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August 21, 1997

VB Assist Quick Tips

Using the AutoSave feature in the VBAssist Options box automaticallysaves changes made to your project after a defined time interval. To temporarily bypass VBAssist’s Control Lock feature, hold down theCtrl

Editing Grid Cells

Grids provide a nice way to present certain types of spreadsheet information.Unfortunately, the grid in VB does not allow editing. With just a littlebit of code you can simulate editing

Setting Tab Stops in List Boxes

To quickly set tab stops in list boxes, use the SendMessage API call.The units used are called Dialog Base Units, which average out to aboutfour per character. Some experimentation is

Use the Controls Collection

If you need to reference every control on a form, using the Controlscollection will be faster than referencing every control directly. Forexample, if you have four command buttons on a

Preventing “Invalid Use of Null” Errors

If your app uses database or other functions that can return Null variants,your app will crash sooner or later with that dreaded “Invalid Useof Null” error. Preventing it is simple: