RE: Bug or Feature? CancelButton vs Escape Key

Hi Terry,

Sorry for let you wait.

Yes, after performing some research, I found that some customers had
reported the similar issue as a bug. The problem lies in that the ESC key
causes the validating from Button.PerformClick method, while clicking
button will trigger the validating through Control.WmSetFocus internal
method. So it seems that Button.PerformClick method does not check
Button.CauseValidation correctly internally.

Please refer to the bug link below for more information:
"CausesValidation has no effect on Button when PerformClick is called. "
http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?Feedbac
kID=116242

To workaround this problem, you may intercept the ESC key explicitly and
set AutoValidate property to AutoValidate.Disable to disable the
validating, sample code snippet is listed below:

Protected Overrides Function ProcessDialogKey(ByVal keyData As
System.Windows.Forms.Keys) As Boolean
Dim cancel As Button = CType(Me.CancelButton, Button)
If keyData = Keys.Escape Then
Me.AutoValidate = Windows.Forms.AutoValidate.Disable
cancel.PerformClick()
Me.AutoValidate = Windows.Forms.AutoValidate.Inherit
Return True
End If
Return MyBase.ProcessDialogKey(keyData)
End Function

Thank you for reporting this bug and sorry for introducing any
inconvinience to you.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
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