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How to display Error Line Number in VB
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| Total Hit (2841) |
In VB you can display error line number. Its little tedious job but it works fine. you have assign numbers to lines where you want to track error line number. These line numbers should be unique within function or sub.
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How to Encode/Decode URL using API
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| Total Hit (5468) |
Sometimes you might need to Encode/Decode URL programatically. This article will show you how easy it is using 2 undocumented APIs.
Encoding URL means convert any unusual character into escape code (e.g. space will be replaced by %20).
Decoding URL means convert escape code into actaul charac
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Extract and Play individual record stored in WMF/EMF file
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| Total Hit (7134) |
A metafile is a collection of structures that store a picture in a device-independent format. Device independence is the one feature that sets metafiles apart from bitmaps. Unlike a bitmap, a metafile guarantees device independence. There is a drawback to metafiles however, they are generally drawn
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Rotating Image using PlgBlt API (Win 9x/ME not supported)
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| Total Hit (8417) |
- Create a standard exe project
- Place two picture box and one timer control onth form1
- Assign some image (relatively small image would do betetr) to Picture1.
- Add the following code in form1
«code LangId=1»Private Declare Function PlgBlt Lib "GDI32.dll" (ByVal hDCDest As Long, _
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Working with Region API
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| Total Hit (4663) |
A region is a rectangle, polygon, or ellipse (or a combination of two or more of these shapes) that can be filled, painted, inverted, framed, and used to perform hit testing (testing for the cursor location).
From this article you will learn
- Creating regions of different shapes (i.e rectangl
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Working with AVI Files - Part 3 (Working With Frames, AVI to BMP)
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| Total Hit (26017) |
In my previous 2 articles «a href='CodeDetail.aspx?CodeId=3612'»«b»Part-1 (Opening and Closing AVI file)«/b»«/a» and «a href='CodeDetail.aspx?CodeId=3613'»«b»Part-2 (Working with AVI Streams)«/b»«/a» you learned that how to open and close AVI file and Stream we also learned how to get basic informat
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How to bring window to the front in Windows 2000/ME ?
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| Total Hit (4477) |
Have you ever tried to use SetForegroundWindow function in Windows 2000/ME ? In windows 9x its very easy to set foreground window, just pass window handle to SetForegroundWindow and done... But in Windows 2000 and ME microsoft has changed the process for setting foreground window. In windows 2000 an
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Working with AVI Files - Part 1 (Opening and Closing AVI file)
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| Total Hit (22346) |
This series of articles will show you step by step approach for working with AVI files in VB using Win32 API. In this article series we will go through following tutorials.
Other articles in this series
«b»«a href='CodeDetail.aspx?CodeId=3612'»Working with AVI Files - Part 1 (Opening and Closi
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Working with the PivotTable Component's Object Model
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| Total Hit (2334) |
The PivotTable List control is represented in the object model by the PivotTable object. You use the DataSource property to specify the source of the data to be displayed in the control. Typically, this property setting will consist of an ADO data source or another one of the Office Web Component co
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The status of shift keys
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| Total Hit (2988) |
Visual Basic lets you test the state of the Shift, Alt and Ctrl keys only within the KeyUp, KeyDown and all the mouse-related event procedures. If you want to test the state of these keys from within another routine, you can resort to the following functions:
«Code LangId=1»
Private Declare Fun
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Create a simple Windows inspector
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| Total Hit (4319) |
It takes only a handful of lines of code to create Windows inspector program, that is, an utility that lets you display the handle, the class name and the contents (Text or Caption) of the window under the mouse cursor.
To create such a program, create a small form, add a Label1 control and a Tim
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Use Objptr function to quickly locate an object in a Collection
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| Total Hit (3228) |
One of the simplest and most effective uses of the ObjPtr function is to provide a key for quickly locating an object in a Collection. Let's suppose you have a collection of objects that don't have a property that can be used as a key to retrieve them in a collection. You can work around this by usi
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Don't stop timers when a MsgBox is active
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| Total Hit (2173) |
Not all developers know that Timer controls in compiled VB5 and VB6 applications aren't stopped by MsgBox statement, so the Timer's Timer event procedure is regularly executed even when the message box is being displayed on the screen.
However, inside interpreted applications under all VB version
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Checking for Media Availability Using DeviceIoControl
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| Total Hit (1460) |
This is the DeviceIoControl method for determining if a given drive has media present. The nice thing about this call is that it does not need to spin up the disk - the call returns instantly. The only lag might be if a new disk was inserted and the call was made while the OS was spinning up the dri
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How to Set a Flat ListView Header Style
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| Total Hit (1331) |
There may be occasions where a flat-looking listview column header suits the design of your application more that the standard default button-style. By obtaining the handle to the header portion of the listview, and toggling its HDS_BUTTON style bits, the header takes on a flat appearance. Setting
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Definitions of the ListView API Members
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| Total Hit (1122) |
This method is intended for Visual Basic 5 or Visual Basic 6 where the Common Control library used is the MSComCtl 5 version (comctl32.ocx). Because the VB6-specific mscomctl.ocx (Common Controls 6) is a complete implementation of comctl32.dll and not reliant on the version of comctl32.dll installed
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Substituting a ListView for a Combo's Dropdown List
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| Total Hit (1163) |
Once the methods to trap the display of a combo's default dropdown list had been coded, substituting another control in place of the dropdown list is as easy as modifying the basic routine to point to the new control. Based on the code listed above, the only changes needed to support a listview cont
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Using the cNewMenu DLL to Create Start Menu/ICQ Style Pop-up Menus
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| Total Hit (1804) |
The PopupMenu ActiveX DLL let's you create an unlimited number of cool-looking pop-up menus in your application, but what to do in the unlikely event that even that's not cool enough for you? The new version gives you this control too. The OwnerDraw property, which applies to each menu item allows y
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Using CBT Hooks to Centre API Dialogs
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| Total Hit (2171) |
Windows sometimes places Common Dialogs and Message Boxes at the "wrong" position on the screen. Whilst there are some ways of working around this for Common Dialogs, a more general solution which applies to any Windows dialog is to use a CBT (Computer-Based Training) Windows Hook. These Hooks provi
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Secrets of FTP
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| Total Hit (2674) |
Read our practical introduction to the File Transfer Protocol for Visual Basic developers. You'll find out how to retrieve listings of FTP directories, download and upload files, and how to resume broken file transfer. FTP Quick Reference will help you to learn all the FTP commands and server reply
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