To use a bitmap or other graphics in the client space of MDI forms,the only trick is getting the hWnd for that window so that you can useGDI functions on

When you’re using VB’s built-in database functionality, you’re likelyto get a corrupted database sooner or later. Use this code to open yourdatabases and automatically repair any corrupt ones: On Local

Most professional applications have an Undo menu option under the Editmenu. If you want to have an undo feature for every text box, you may thinkyou need to create a

It is sometimes useful to determine the amount of Windows resourcesavailable. You can show percentage of free resources in an about box, forexample, or to detect memory leaks in a

VB strips comments out in the final .EXE file, so use as many commentsas you need.

Ever wanted to add a “Search for Help on…” item in themenu bar? Here’s the secret: ‘Declares and Constant for Help Menu Declare Function WinHelp% Lib “User” _ (ByVal hWnd%,

Question: Is there a way to target dynamicly created html from a form in one frame to another using perl? Answer: Sure thing.

VB4 not only allows you to create OLE Automation servers, butto debug the server and the calling application simultaneously.If you want to create a remote OLE server, set the Instancingproperty

From the days of VB3, you no doubt recall the pain of retrievinganswers from a dialog form that you displayed from another form.The use of Globals was about the only

Writing add-ins for Visual Basic 4.0 can be challenging, rewarding,and tricky. If you are not careful writing add-ins, you can causeVB to do strange things and even abort. Although I’m

VB4 provides lots of new capabilities to use objects. Unfortunately,all of them require the object to be set beforehand, which isn’talways feasible. VB provides no way to see if an

APILOD16.EXE and APILOD32.EXE access the file WIN32API.TXT toallow the programmer to paste the TYPE declarations needed tocall the Win32 API. The file WIN32API.TXT incorrectly allots a LONG field to eachbit

Because setting the MousePointer property for a form only changesthe shape and does not prevent the application from acceptinguser input from the mouse or keyboard, I have developed this tip.The

Tired of loading icons or bitmaps or creating many images withthe several styles of pictures in form modules that blow up yourapplication and slow it down in VB3? If so,

When I replaced the Apex dbGrid, with the free upgrade, TDBGridS1.OCX,I got complaints about the behavior of the grids when I enteredor edited data in TDBGrid Standard. The cell pointer

Avoid “Couldn’t update; currently locked by user ‘name’ onmachine ‘machine’ ” error in VB4 when two or more applicationsaccess the same MS Access database table. For the given table, a

If you can’t think of anything nice to say about somebody, getto know them better.

When you use some custom controls like QuickPak Professional byCrescent it’s impossible to use the shortcut “Ctrl+V”for “Paste.” “Ctrl+V” allows you to pastetwo times the text of the clipboard. You

When I work with VB under Windows 95, I’ll often do somethingwith a program that causes Windows 95 to be unstable. Normally,I would shut down Windows 95 and restart to

This seemingly undocumented SQL table qualification syntax mightbe useful to access an external table by using the ‘IN’ keyword.I had used this ability before, but kept having trouble with joins(probably

To change the item’s location by dragging the mouse in a listbox, follow this tip: Sub List1_MouseDown (Button As _ Integer, Shift As Integer, X As _ Single, Y As

While the TreeView control with its associated Node objects isa far cry better than the VB3 Outline control, it lacks a methodfor sequentially traversing the tree, as if you were

A program originally written using the Borland C++ Compiler hastwo problems in Visual Basic 3.0, Standard Edition. This programuses trigonometry to calculate the distance between two points,when you know their

To highlight the row containing the active cell in a bound DBGrid,add the record set’s current bookmark to the grid’s SelBookmarkscollection: Private Sub DBGrid_RowColChange _ (LastRow As Variant, ByVal LastCol

The 32-bit API is much richer than the 16-bit API. However, theGetDriveType still reports networked CD drives as just a DRIVE_REMOTE(i.e., a networked drive). While true, it is not particularlyhelpful.

One of the trickier parts of handling date values is dealing withleap years. Everyone knows that every fourth year is a leap yearin which February has 29 days instead of

To prevent users from launching multiple instances of your application,check the PrevInstance property of VB’s App object; if the propertyis True, the program is already running. To activate the previousinstance,

A severe bug in VB4 appears when using the Databound Grid withmodal forms. Create 3 forms: form1, form2 and form3. Put a buttoncommand1 on each of the forms. In the

In VB4, each control array is its own collection and thereforehas a Count property. This was not the case in version 3. It isnow possible to loop through all of