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True) End If End If End Sub End Class You can do as poojavb has stated, but if you are using this textbox for input in a database, you will have to be sure that the user can't submit the changes when the textbox is empty (contains default mask) or it will blow up.
Small, incremental changes to existing controls can be the best way to extend . Small changes are easy to implement and test and can add real value.
The Or Else condition is used to provide logic short-circuiting.
For example, we don't want Accept Mismatch to be called—see lines 26 through 34—unless the Expression is not empty and the Regex. If we use plain old Or, we get the Accept Mismatch dialog every time, which of course is a logic error.
Finally, Accept Mistach displays a message box that informs the user that the input Text failed validation. Text Align End Get Set(By Val value As Horizontal Alignment) My Base. True) End If End Set End Property _ Public Shadows Property Text Align As Horizontal Alignment Get Return My Base. On Key Press(e) If Not Is Decimal Then If Not Asc(e. total amount textbox can be any one the textboxes present on the form. "The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Doing so can cause your application or the operating system to stop responding.