Form validating event vb net

Consistent use of these techniques will help make your applications more robust and reliable.

She is on the INETA Speaker’s Bureau, is a well-known speaker at technical conferences, and is a Microsoft Most Valuable Professional (MVP).But in the real world, you need to handle unexpected problems when your code is running.The user might delete a critical file or enter invalid data.The Validate event fires whenever the user attempts to set focus to another field on the same form or when the form unloads from memory while the current field has focus.A programmer can evaluate the state of the data at that point and react to any error in the data either by: Listing 5.4 illustrates the use of the Validate event procedure to perform validation and to decide whether or not to keep focus on the current control.

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