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FillFlexGrid - Routine to fill flexgrid from ADO recordset
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| Total Hit (3591) |
The following routine takes 2 arguments, ADO recordset and flexgrid which you want to fill.
«code LangId=1»
Sub FillFlexgrid(rst As ADODB.Recordset, msfGrid As MSFlexGrid)
Dim cln As Field
With msfGrid
.Rows = 2
.Cols = rst.Fields.Count
'get the number of gri
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Optimize Parametrized Queries With ADO Objects
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| Total Hit (3070) |
When you write Insert statements, it can be difficult to accommodate the possible values end users might enter into a textbox. The most common task is replacing single quotes with double quotes. However, parameterized queries provide two benefits: You do not have to parse data entered by users—excep
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Load, Modify and Save 1, 4, 8, 15 (Bit-fields), 16, 24 and 32-bit Bitmaps using GDI Apis.
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| Total Hit (5082) |
This sample code will show you how to load 1, 4, 8, 15 (Bit-fields), 16, 24 and 32-bit images from disk and modify them into memory and save back to disk.
Just copy/paste the following code into form1 code window. Before you run this example make sure that you modify the ImgPath and SavePath.
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Dynamically Add Controls to a Form with Visual Basic 6.0
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| Total Hit (28470) |
Visual Basic 6.0 allows you to dynamically add control to a form at run- time using the new Add method of the Controls collection. This article shows how to dynamically add intrinsic and ActiveX controls.
«pre»«b»Control«/b» «b»ProgID«/b»
==========================================
CheckB
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Working with Bitmap and DIB
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| Total Hit (15665) |
In this article we will learn basic concept to work with Bitmap and DIB. We will wrap all functionality in a handy class which can give you ability to work with 2D Pixel array of Bitmap loaded into the memory.
Before we implement DIB and BMP class lets understand BMP file format which is DIB (Dev
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How to use BeginPath and EndPath to fill open shapes.
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| Total Hit (4316) |
Have you ever tried to fill shapes which are drawn by Polyline or PolyBezier which doesn't draw closed figures. The problem is its not closed figure so you cannot fill using regular fill method which works very well with closed figures. The solution to this problem is BeginPath and EndPath apis
Y
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Working with Arc API (Arc, ArcTo, AngleArc)
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| Total Hit (4943) |
In this article we will explore 3 APIs (Arc, ArcTo and AngleArc).
An arc is a portion or segment of an ellipse, meaning an arc is a non-complete ellipse. Because an arc must confirm to the shape of an ellipse, it is defined as it fits in a rectangle and can be illustrated as follows:
«BR»«P Al
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How to use AnimateWindow API to animate form on Load/Unload events
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| Total Hit (7046) |
The AnimateWindow function enables you to produce special effects when showing or hiding windows. There are three types of animation: roll, slide, and alpha-blended fade.
«b»Step-By-Step Example«/b»
- Create a standard exe project
- Add a new form called Form2 (Form1 is added by default)
- A
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How to modify (Add/Remove) System Menu using API ?
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| Total Hit (12077) |
In this article you will learn how to modify system menu (control menu). You will also learn how to handle event of newly added menu item.
To modify system menu first you have to call GetSystemMenu api to get handle of system menu and then you can all other menu APIs (i.e. GetMenuItemCount, Appen
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How to disable form's Close button (X)?
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| Total Hit (5002) |
To modify an item in the Visual Basic Control menu (also known as the System menu), you need to use the SetMenuItemInfo API function. You can use ModifyMenuItem or EnablemenuItem api, both functions work. However it appears that Visual Basic re-enables the menu item whose ID is SC_CLOSE. This is why
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How To Start a Process as Another User from Visual Basic
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| Total Hit (6832) |
This article shows you how to programmatically start a process as another user from Microsoft Visual Basic. To do this, you can use the LogonUser and CreateProcessAsUser Win32 APIs on a computer that is running Microsoft Windows NT 4.0, or you can use the CreateProcessWithLogonW Win32 API on a compu
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How To Use High-Level Access Control APIs from Visual Basic
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| Total Hit (4559) |
The Win32 API provides two sets of APIs for working with security descriptors (SDs) and access control lists (ACLs). Low-level as well as high-level access control API sets provide an interface for working with SDs and ACLs. For Microsoft Windows 2000 and MIcrosoft Windows XP, the high-level access
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Handling NTFS Permissions Part-2 (handling user object permissions)
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| Total Hit (11225) |
The Win32 Application Programming Interface (API) provides two sets of APIs for working with security descriptors and access control lists (ACLs): low-level and high-level. This series of articles provide a complete set of Microsoft Visual Basic code samples that use low-level access control APIs to
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Handling NTFS Permissions Part-4 (handling registry key permissions)
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| Total Hit (7816) |
The Win32 Application Programming Interface (API) provides two sets of APIs for working with security descriptors and access control lists (ACLs): low-level and high-level. This series of articles provide a complete set of Microsoft Visual Basic code samples that use low-level access control APIs to
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Handling NTFS Permissions Part-5 (handling printer permissions)
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| Total Hit (11036) |
The Win32 Application Programming Interface (API) provides two sets of APIs for working with security descriptors and access control lists (ACLs): low-level and high-level. This series of articles provide a complete set of Microsoft Visual Basic code samples that use low-level access control APIs to
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How to use Named Pipes in a Visual Basic 32-bit Program ?
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| Total Hit (11490) |
Visual Basic can create applications that communicate to other processes by means of Named Pipes. The Named Pipe must be created on Windows 2000 or Windows NT; however, you can read from and write to that pipe from any 32-bit platform.
This article demonstrates Client/Server communication using a
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How to force a window to be a ForeGround Window on Win 9x/NT both ?
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| Total Hit (8840) |
Microsoft changed the rules with Win98 and Windows 2000 . The SetForegroundWindow API can no longer be used directly to take focus away from another application. Here is the code to implement ForceForeGround window functionality.
Here I have used VB function that uses AttachThreadInput together w
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How To Call CLSID And ProgID Related COM APIs in Visual Basic
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| Total Hit (5498) |
This article demonstrates how to use a set of related Component Object Model (COM) APIs that retrieve and manipulate CLSIDs and ProgIDs. The following APIs are discussed:
«UL»«LI»CLSIDFromProgID: To retrieve the CLSID of a COM object with a given ProgID.
«LI»StringFromCLSID: To convert a CLSID s
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Retrive and set Auxiliary devices volume info.
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| Total Hit (3679) |
This code will loop through all Aux devices and set volume to 50%. You might have problem under NT/Win 2000 using auxXXXXXX APIs. Microsft recommands to use mixerXXXXX APIs. auxXXXXXX APIs are old school APIs. But for example purpose we have used auxXXXXXX APIs here.
«code LangId=1»Private Const
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Working with AVI Files - Part 3 (Working With Frames, AVI to BMP)
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| Total Hit (25482) |
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 load BMP file into memory and perform rotation on it ?
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| Total Hit (8739) |
Bitmap rotation is a graphic effect that Visual Basic does not natively offer. This article shows how to rotate a given image in 90-degree increments. It allows you to rotate any image 0, 90, 180 or 270 degrees. With a little work, the code can be modified to rotate to any angle, but that is beyond
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How to set default printer programatically on Win 9x/NT ?
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| Total Hit (4439) |
This article shows how to programmatically set which printer is the system default printer. Not all applications or components can select a specific printer to use. This often makes it necessary to change the default printer for the system so that the application or component will use the desired pr
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Get CPU name using low level machine instructions (Assembly!) in VB!
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| Total Hit (4030) |
Here is the most advanced technique probably you have ever seen in VB. Haven't you been told by the "experts" that you can't do low level programming stuff in VB which you can do in C/C++/ASM ? But here I shall prove them wrong. This little code will demonstrate how to execute low level Machine inst
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