Input Type File Accept Ppt

These six definitions don’t go for all input types or browsers. PowerPoint for Office 365 PowerPoint 2019 PowerPoint 2016 PowerPoint 2013 More Less Content from a PDF file might be what you need for your presentation, but it's not as easy to get content out of a PDF file as it is from many other document types. Thus, the following would redirect the standard input for wc from the keyboard to the file named file1: wc. Create simple slideshows or complex multimedia displays for in-person or online presentations. Turnitin solutions promote academic integrity, streamline grading and feedback, deter plagiarism, and improve student outcomes. This is actually a very subtle change that's very useful as it makes it much easier to send multiple files to the server without using complex uploader controls. Save the file. We recommend that you use the mp3 format as the file size is smaller. how to create input boxes in Access, but I can't seem to find the object to use in Powerpoint which allows the user to type on the slide (as opposed to the pop up box). It is very much like a PRINT statement, but instead of sending the information to the screen, WRITE sends the information to a file. Viewing 6 posts - 1 through 6 (of 6 total) Author Posts July 10, 2014 at 1:32 am #175122 kajalParticipant I was trying to remove choose file(no file chosen), the default result of input type file […]. Thank you for helping us maintain CNET's great community. With input redirection, the operating system causes input to come from the file (e. input[type="file"] に対して accept 属性を指定することで 指定出来るファイルのタイプを絞ることができます. Right-click an email attachment and select "Compare with Workshare" to run a comparison and see every change. Accept the folder it suggests. accept only *. input file类型,文件类型的限制 直接限制input type='file'的文件类型限制,通过accept属性进行设定,多个类型用逗号分隔开, 因为accept是html5的新特性,所以火狐和IE的支持就显得单薄了,. 100% free, secure and easy to use! Convertio — advanced online tool that solving any problems with any files. PDFill: PDF Form Filler Adobe PDF form is an electronic-based form, resembling a traditional paper form that can collect data from a user and then send that data via email or the Web. Form, and the "input type="file" accept="image/*"" works perfectly - it will open up a dialog with various options. m4a extension are container files that store audio data. The Microsoft Windows “Choose File to Upload” window should be open and you should be able to locate whatever files you want to upload using the standard Windows keystrokes. Handle keyboard input. К полю для отправки файла (). Microchip Technology Inc. The input element represents a list of selected files, each file consisting of a file name, a file type, and a file body (the contents of the file). A description of HTML 4's INPUT element for form input. Placing a restraint on an HTML upload field is accomplished by using a hidden input field with the name attribute set to MAX_FILE_SIZE. When a user uploads the file and clicks on Submit button, then first page of the uploaded file is converted into image file and shown on the browser without postback. Adding a file display list to a multi-file upload HTML control by Raymond Camden on September 10, 2013 | Comments I'm working on something a bit interesting with a multi-file upload control, but while that is in development, I thought I'd share a quick tip about working with multi-file upload controls in general. Open the presentation you want to import text into and run this macro. txt for tab-separated data and *. Note: The accept attribute can only be used with. For more extensive information about any of these commands, use the man command as described below. A truly unlimited file sharing service. Display label for the control, or NULL for no label. C provides standard functions scanf() and printf(), for performing formatted input and output. ezelcreative. The great advantage of ASP is possibility to respond to user queries or data submitted from HTML forms. java The -g command line option is optional, but we recommend using it as it makes debugging easier. Select a file or scan a document. This means you can open and edit presentations from others, and then save them right from WPS Office knowing others will be able open them without any issues. Windows Command Prompt The command prompt is simply a window that by default displays the current directory, or in windows term a folder, that you are in and has a blinking cursor ready for you to. ) Note: The only source files available for download are files that have been uploaded. The C-130, while an outstanding aircraft, does have operational limitations that should be considered by Army combat developers, materiel developers, planners, analysts, and decision-makers. You can only upload files of type 3GP, 3GPP, MP4, MOV, AVI, MPG, MPEG or RM. It is very similar to the. Fast, flexible and pragmatic, PHP powers everything from your blog to the most popular websites in the world. c : power or energy put into a machine or system for storage, conversion in kind, or conversion of characteristics usually with the intent of sizable recovery in the form of output. It’s quick and simple to use, with no hidden costs, registration or email required. Note: sometimes changing the extension of the OpenOffice. ) Note: The only source files available for download are files that have been uploaded. The following code example demonstrates how to use the Accept property to restrict the user from selecting any file other than an image file. The markup discussed so far, the old familiar INPUT file element with the extra accept attribute, serves well the purpose of letting mobile users to upload a picture that is already saved to the local gallery or to snap a new one. a sample value or a short description of the expected format). table inet filter { chain input { # this chain serves as a dispatcher type filter hook input priority 0; iif lo accept # always accept loopback iifname enp2s0 jump input_enp2s0 iifname enp3s0 jump input_enp3s0 reject with icmp type port-unreachable # refuse traffic from all other interfaces } chain input_enp2s0 { # rules applicable to public. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. PowerPoint cannot insert a video from the selected file. The C-130's operational limitations are real and should be considered when designing equipment and planning operations. In response to an issue request to update the libraries, I have done so with the new v1. The short hint is displayed in the input field before the user enters a value. « input type=reset input type=hidden » ⓘ input type = file – file upload control # T The input element with a type attribute whose value is " file " represents a list of file items, each consisting of a file name, a file type, and a file body (the contents of the file). Examples include retrieving just the file name or the file extension. In this tutorial, you will learn to use scanf() function to take input from the user, and printf() function to display output to the user with the help of examples. According to the official website, VLC does support MP4 files. Upload, send and receive any type of file up to a massive 5GB, with unlimited file bandwidth. cs" are shown. Try out with both, like select a. EUROTHERM 7100A PDF - Buy Eurotherm Power Controller, Analogue Input, A A Series of single phase Power controllers are for use with all load types. Summary: Use SendKeys to provide input to graphical applications with Windows PowerShell. type The MIME type reported by the browser (for example, text/plain), or empty string if the browser didn't know. PowerPoint Sound Clips. The following program (a revision of a previous example) prompts the user for both the names of the input file and the output file. However, other versions of PowerPoint still cannot insert and play MP4 files. jQuery get File Name, Type: This article explains how to get the file name, file size (in bytes), file type (Text/PDF/CSS files) and total selected file counts in jQuery before uploading it to the server. When you upload a presentation file, we will store the original and then break it up into individual slides within the VoiceThread. The way this html code works depends on the browser engine. accept="image/*" can allow Only Images to upload. When type is not supported, the fallback is that the input accepts files of any type. These types introduce a level of abstraction over the raw data. Join over 5. It is common to place all of the data items for one object on the same line and separate each item with some special character, called a delimiter. Now, make sure your forms are accessible, and pretty. site2preview. Object type that identifies a stream and contains the information needed to control it, including a pointer to its buffer, its position indicator and all its state indicators. Password input controls This is also a single-line text input but it masks the character as soon as a user enters it. “24Slides helps us get PowerPoints on-brand, and improve overall design in a timeframe that is often “overnight”. One is click on font box in top left and select one of following font “Mangal, Devnagri (देवनागरी)”. Maybe the implementation is wrong, but since I don't know what the correct mimetype for a "wsq" file is, I don't know how to test that. The Android system shows an on-screen keyboard—known as a soft input method —when a text field in your UI receives focus. The system supports both whole sentence input pattern and word input pattern. Help make the web just work! Identifying a root cause helps us resolve issues more quickly. The Path Class introduces the cornerstone class of the java. , accessions or gi's). Once your file uploads, right-click it, point to “Open With” on the context menu, and then select “Google Slides. These include static and dynamic webpages, Web applications, and files referenced by webpages. The PowerPoint file can now be edited and saved as an Impress file or a PowerPoint file. Below is a quick review of bullets, check boxes, text fields, and input fields and using them to build a form to retrieve some personal information about our user. Click the Office Button (PPT 2007) or File (PPT 2010) and click Save As. Click on the Text Box button (circled in red above). org to create a new empty file of the same type as the damaged one and save it. 2) it works perfect aswell in both android browser and chrome. Content on this page is licensed under the Creative Common Attribution 3. Upload files recursively within folders using webkitdirectory. The extension method will attempt to guess the file's extension based on its contents. Two-Dimensional Arrays • Arrays that we have consider up to now are one-dimensional arrays, a single line of elements. Unless the multiple attribute is set, there must be no more than one file in the list of selected files. When type is not supported, the fallback is that the input accepts files of any type. PDF, Word, Excel, Text, CSV, HTML, JPG, TIF for example. Chapter 12 - File Operations 1 Starting Out with C++, 3rd Edition 2. The example is going to: Ask the user for a color in a JSP - in our example it will be "Home. In that time, we have served more than two million users and host more than 14 million files in our private datacenter. Bootstrap example of Input File - Popover Preview Image using HTML, Javascript, jQuery, and CSS. Input Specifications for a Character. styling file input; get the name(s) of files, since we aren’t depending on the original input to tell us what our user has uploaded; bonus: read and display the text content of file. Display label for the control, or NULL for no label. I have an app that loads a webpage. Any media on the web. The other part of the IO type, in this case (), is the type of the return value of the action; that is, the type of what it gives back to the program (as opposed to what it does outside the program). Cool and practical a script it is!. Accent codes is a handy reference chart of ascii alt codes for accents. PPT, PDF, DOC file types uploading issue. การเซตให้คอมเครื่องแม่ แชร์เน็ต ให้เครื่องลูกหลายๆเครื่อง (แบบที่ 3 Kerio ยุ่งยากหน่อย แต่ประโยชน์มาก). Click somewhere else on the worksheet then check that you have. Learn the data types in R--including scalars, vectors (numerical, character, logical), matrices, data frames, and lists. Many tube amplifiers can accept different types of output tubes. Tube swaps allow the end user to find the tube type and model that not only blends with their system, but also their personal taste. PDF files can be easily printed but not easily modified. input type="file"でaccept属性を指定する 以下のサイトによると、HTMLの仕様ではaccept属性を指定すると、特定の拡張子を持つファイルだけを許可するという意味になるようです。 input要素に type="file" を指定すると、ファイルアップロードコントロールになります。. The input function allows you to ask a user to type some sort of information into the program and to save that information into a variable that the program can process. Explorer lets you decide whether you'll accept or refuse cookies the first time you visit a site, then remembers your answer the next time you visit there. Finally, we need to CLOSE the file, to let QBASIC know that we are done. type="text" defines these instances as a single-line input field to accept text. We recommend that you use the mp3 format as the file size is smaller. Originally based on. Question Types To add a question, drag and drop it onto the survey from the BUILDER section of the sidebar in the Design Survey section. csv (***not include all file) when browse dialog. Skype file sharing: file types, size, and time limits Back to search results You can send, receive, or view any type of file over Skype, but there are size limits on the files you can send. File Input/Output in C. c to accept characters instead of integers. 原理是用js获取input file的图像流,然后赋给img标签的src属性,然后再设置这个img的css,就能得到你要的效果了。 这里只写js代码,其他的你应该会了吧?. We let you use a free and simple online file converter that works with a wide range of file types. The syntax of a URL is fairly intricate. The defines a file-select field and a "Browse" button for file uploads. Justin Mecham is excited to note that input type="file" multiple is implemented in a browser, namely Safari 4. Ask if any have prior experience. 100% Compatible With Microsoft ® PowerPoint PRESENTATION supports both PPT and PPTX files. Some device will not even support the HTML5 standard (work-in-progress) input/image/camera element. PDF, Word, Excel, Text, CSV, HTML, JPG, TIF for example. Input Devices Posted by Chirag Jain So as of now i cant provide you the password or the Presentation file itself. Now you have created a folder. 2 Starting Out with C++, 3rd Edition 3. QSS: If you customize statements and reports with QuickBooks Statement Writer, QuickBooks saves your settings in a file with a. For older versions of PowerPoint you will need to use the wav format. The input element, having the "file" value in its type attribute, represents a control to select a list of one or more files to be uploaded to the server. Open the presentation you want to import text into and run this macro. Sublime Text is a sophisticated text editor for code, markup and prose. Accept = ". Click the "File" menu and select "PowerPoint" Options. If you run it under Electron, it does not appear. This cataloging helps the browser open the file with the appropriate extension or plugin. This code uses the same prompt method to get a user's name, but then it displays the information in an "input" element with the type set as "text. This is due to the average hourly wages in the field in China reaching US$3. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. txt Tack the current process list onto the end of the file processes. In this part of the Ruby tutorial, we will talk about input & output operations in Ruby. If you need to type in a foreign language on your computer, you can do so by changing the input language (i. On the website, we used html5 file input i. New to Oracle Community? Be sure to check out our FAQ and read through the Community Guidelines. 2) it works perfect aswell in both android browser and chrome. HTML5 File input has accept attribute and also multiple attribute. If strict is false, and you provide a file extension in the attribute accept, the extension overrides the blocked extension list in the server or application settings. One reason you can't block the upload is that (barring "chunked" transmissions), the data is actually part of the total form upload data packet,. The Input Function The input function is used to ask the user of the program (not the programmer) a question, and then wait for a typed response. NET Web API asynchronously using the Task-based pattern introduced in. Here we're using the -m switch to load a module (state). Online Pinyin Input Method is based on the Hànyǔ Pīnyīn romanization. DXF file is structured in several sections. I have worked around it by saving any new Powerpoint presentatons in Compatability mode (effectively turning it into a 2003 version), but that defeats the purpose of havng Powerpoint 2010 in the first place. Here's how to terminate an employee in the Philippines the legal way. Now you have created a folder. This new streamlined viewing experience will enable instant viewing of Word and PowerPoint files. zip file) on User's local system without user being redirected to an URL or a prompt asking him/her to click a button to download the this zip file. and a file called foo. File Operations introduces concepts common to many of the file I/O methods. Audio File Formats. Peripheral device, also known as peripheral, computer peripheral,input-output device, or input/output device, any of various devices (including sensors) used to enter information and instructions into a computer for storage or processing and to deliver the processed data to a human operator or, in some cases, a machine controlled by the computer. The type ahead buffer is limited to 255 characters, just like the maximum string length for canonical input processing ( or ). Our InputBox method is defined in a custom class Tmp. Explain Different type of Access Methods by Dinesh Thakur Category: Memory In computing, an access method is a program or a hardware mechanism that moves data between the computer and an outlying device such as a hard disk (or other form of storage) or a display terminal. The easy way to compress your PowerPoint files First, simply choose an image (any one will do) to edit with PowerPoint Picture Tools (all you have to do is double-click the image to open this view). I've been looking into using html 5 to take a picture from my webapp and upload the image to the database using php - this is now working correctly. This new streamlined viewing experience will enable instant viewing of Word and PowerPoint files. Using Windows Pen Input and Ink Features If you are using Windows 8, Windows 7, or Windows Vista, you can add handwritten input and convert it to text. Image files can be quite large, and larger file types mean more disk usage and slower downloads. These are described in 3) below. A hashset containing the hash values of all files known to be a part of a given operating system, for example, could form a set of known good files, and could be ignored in an investigation for malware or other suspicious file, whereas as hash library of known child pornographic images could form a set of known bad files and be the target of. Net MVC Razor. NFA is the industrywide, self-regulatory organization for the U. Those source files are then compiled into. Preparation: This shape is used to depict a step that involves preparation, such as setting up your equipment or even a process. Please note that animations, links, and transitions are not preserved in VoiceThread. Many tube amplifiers can accept different types of output tubes. An input plugin enables a specific source of events to be read by Logstash. Run the app, extension, or other file type. Create simple slideshows or complex multimedia displays for in-person or online presentations. The now becomes effectively invisible, and the styles input/image shines through, but you can still click on the "Browse" button. For those without html5 you'll just need to let them upload any file they want and check the extension (or file type) after it has been uploaded to decide if you want to keep the file. If the button is positioned on top of the image, the user appears to click on the image and gets the normal file selection window. Filters make it easier for the user to open a valid file. Comparisons and advocacy. Content on this page is licensed under the Creative Common Attribution 3. Object-oriented programming (OOP) languages are designed to overcome these problems. Interactive API reference for the JavaScript FileReader Object. Actually, it seems that current implementations don't rely on the capture attribute at all, but only on the type and accept attributes: the browser displays a dialog box in which the user can choose where the file has to be taken, and the capture attribute is not taken into consideration. ACCEPT variablename [type] [FORMAT format] [DEFAULT defaultvalue] [PROMPT prompt_text | NOPROMPT] Define variablename , if not already defined, and read a line of input into it. The great advantage of ASP is possibility to respond to user queries or data submitted from HTML forms. The accept attribute, when fully supported, limits the file selection dialog to files with certain MIME types. ” The only thing you have to do is to setup a loop that execute the same cout statement ten times. PDF is a universal file format that preserves the appearance of the original document. 0 license (CC-BY). It displays PDF, PPT, PPTX, PPSX but not PPS. Please review this list before uploading a copy of your work as an electronic file or sending a hard copy via mail. By default,. ProShow Producer supports many files types for both import and output. accept only *. In this tutorial I'll show you how to retrieve data from an external txt file and incorporate it into your program in a useful way. Disable preview of content for all file types and instead show file type icons. iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT This is the rule that does most of the work, and again we are adding (-A) it to the INPUT chain. element with our file upload control using reset() method Remove newly added. At the heart of the JAMstack are static site generators (SSGs) that store your data as flat files: Markdown, YAML, JSON, HTML, and so on. If you want to edit a file of this type, open it and then use File > Save a Copy to save the file as a. Go to your desktop, and right-click on the background. If you selected only. Form Processing with PHP One of the best features of PHP is possibility to respond to user queries or data submitted from HTML forms. Note: If an exception is thrown inside a finally block, and it is not caught, then that finally block is interrupted just like the try-block and catch-block is. Introduction to Unix commands Following is a very brief introduction to some useful Unix commands, including examples of how to use each command. Accept the folder it suggests. Here we go, here's the good stuff. How To Handle File Uploads With PHP. In this article I will explain with an example, how to create HTML Fileupload element () using Html Helper and Model in ASP. Question Types To add a question, drag and drop it onto the survey from the BUILDER section of the sidebar in the Design Survey section. The basic unit of OOP is a class, which encapsulates both the static attributes and dynamic behaviors within a "box", and specifies the public interface for using these boxes. Aside from the sample files written specifically for this talk and web site, the other files contain examples of what you can do with TeX. It can be used both for keeping tabs on friends, and as a highly effective business tool for marketing and connecting with customers. I have used python 3. The "accept" method uses the HTML5 files API and its type attribute. Using the File API, which was added to the DOM in HTML5, it's now possible for web content to ask the user to select local files and then read the contents of those files. The system supports both whole sentence input pattern and word input pattern. For more information on setting up this type of file upload, please see the following documentation: Form Question Types - File Upload. Tip: For : to select multiple files, hold down the CTRL or SHIFT key while selecting. To compile a Java source code file Foo. HTML makes this quite easy with its Capture Image:. accept(): POSIX. Learn the data types in R--including scalars, vectors (numerical, character, logical), matrices, data frames, and lists. >> - Append output from a command to an existing file on disk. Blob - Allows for slicing a file into byte ranges. Preparation: This shape is used to depict a step that involves preparation, such as setting up your equipment or even a process. comこちらの問題 につづいてもうひとつ問題にぶつかりました。 やりたかったこと Androidからローカルの画像ファイルをアップロードするフォームをつくりたい できれば、画像以外のファイルは上がらないようにしたい さらにできればjpgとpngしか上がらないようにしたい さらにさ…. To allow this feature there are certain conventions required with regard to the input of identifiers (e. Thank you for helping us maintain CNET's great community. Identifying file types by file extension is common for many developers and for many people may be simpler than identifying files by mime type. 2 Starting Out with C++, 3rd Edition 3. Using VBA input box without an equal sign before it is useless because we would lose whatever is typed into it by the user. The IRS will accept this as notice that you want an extension. This example shows how you can set custom icons for the following file types: docx, xlsx, pptx, jpg, pdf, zip. These types can include applications, sounds, video, text, and many others. qss extension. These are described in 3) below. TIMEOUT - Delay processing of a batch file/command. Maybe the implementation is wrong, but since I don't know what the correct mimetype for a "wsq" file is, I don't know how to test that. The best known file descriptors are stdin , stdout and stderr , with file descriptor numbers 0, 1 and 2, respectively. In the setup(), SD. Equivalent PowerShell: MessageBox - Display a message box. Redirection simply means capturing output from a file, command, program, script, or even code block within a script (see Example 3-1 and Example 3-2) and sending it as input to another file, command, program, or script. For styling, simple solution is to use label. The differences lie in the aligning of the equations and referencing. Please note that animations, links, and transitions are not preserved in VoiceThread. The best known file descriptors are stdin , stdout and stderr , with file descriptor numbers 0, 1 and 2, respectively. The system uses Latin alphabets to denote the initial and final of the character. Displayed as 0 or 1 in MDB Viewer. (It is critical that you do not overwrite the PPT filename extension with a PPC extension; if you do, the file can become unusable. DXF files are structured in a manner that allows the files to be read by a normal text editor. In addition to. iptables is an application that allows users to configure specific rules that will be enforced by the kernel’s netfilter framework. C Input/Output: printf() and scanf(). clcillinois. 7 release has not been updated for about 2 years although it seems quite reliable for me. Supported file formats in ACDSee Photo Studio Ultimate, Photo Studio Professional, Photo Studio Home, and Photo Editor. The defines a file-select field and a "Browse" button for file uploads. In a form, the file value of the type attribute allows you to define an input element for file uploads. So, a browse form is supposed to filter all but two categories: "All files" and "Custom files (*. In PowerPoint for the web, you can open these types of files for editing:. How to create voice-over narration for your PowerPoint Presentation in Microsoft Office Professional 2010 Instructional Technology Training Video Tutorial by: Dawn Dubriel www. Create and edit web-based documents, spreadsheets, and presentations. GoToWebinar will manage your registrants for you and send email reminders to them before the. File sharing network. Because a given file type may be identified in more than one manner, it's useful to provide a thorough set of type specifiers when you need files of a given format. Reset newly added. that is less than 800 pages. In this tutorial, you will learn to use scanf() function to take input from the user, and printf() function to display output to the user with the help of examples. In this case, Twitter is allowing the user to upload common image formats. x or Bootstrap 3. org to create a new empty file of the same type as the damaged one and save it. In this guide, you will learn how to insert a Flash (SWF) file into a PowerPoint presentation in two different ways. It can be forged, so it's crappy security anyway. wlmp at all. In the setup(), open a new file with SD. All code belongs to the poster and no license is enforced. Form, and the "input type="file" accept="image/*"" works perfectly - it will open up a dialog with various options. So anyone of you please let me know how to pass the input to the input box? Regards, Harsha. Using the File API, which was added to the DOM in HTML5, it's now possible for web content to ask the user to select local files and then read the contents of those files. File uploads should be validated on the server. The file input type creates a field through which users can upload files from their local computer or network. An array index is an integer indicating a position in an array. Go to your desktop, and right-click on the background. that is less than 800 pages. The mouse cursor turns into a crosshair, which is a drawing tool. The best 2019 ocean number of family group actions Go to cinema. a : advice, opinion, comment. Имя MIME-типа в любом регистре, несколько значений перечисляются через запятую. Different regions of the world use different systems. 2) it works perfect aswell in both android browser and chrome. Under Windows, select Run from the Windows Start menu, or open a shell under Linux, *BSD, or Mac OS X platforms. QSS: If you customize statements and reports with QuickBooks Statement Writer, QuickBooks saves your settings in a file with a. Python str. The Android system shows an on-screen keyboard—known as a soft input method —when a text field in your UI receives focus. PDF is a universal file format that preserves the appearance of the original document. This, of course, is the nasty situation where to keep your position, you wind up buying stuff, which then fills up your garage, and you become “That Guy”. Schematic diagram R-format instruction datapath, adapted from [Maf01]. When finished, click the DONE button. The EPS file format supports transparency, linked files and thumbnail imaging of documents. PPT, PPTX, Keynote, ODP, and PDF are all supported presentation file types. I was recently playing around with batch scripts (*. • Black-box testing technique to analyse combinations of input conditions • Identify causes and effects in specification ↓↓ inputs outputs current state new state • Make Boolean Graph linking causes and effects • Annotate impossible combinations of causes and effects • Develop decision table from graph with in each column. To provide the best user experience, you can specify characteristics about the type of input you expect (such as whether it's a phone number or email address) and how the input method should behave. In this article I will explain both Client Side and Server Side validation of files using their extensions. how to filter only. The best you can do is to discard the uploaded data if you disapprove of it. jpg file to a. As @mparizeau reported, @JoeHealy's post is talking about HTTP Accept header, which is not what the question is about. Equivalent PowerShell: MessageBox - Display a message box.