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enable/disable  tab function in vb.net form

Posted on 2009-05-01
Medium Priority
Last Modified: 2013-11-26

I want to go thru a form with multiple textboxs and edit the fields as I go. Using the txtbox1.keydown and txtbox1.keypress I seem to be able yo captue the [Enter] key, validate the data and either move to the next txtbox2 if good or display an error message and re-focus on the current txtbox1.  The problem is these methods do not seem to trap the [Tab] key - which then bypasses my edits.  Using the following code I am able to capture the tab key, validate the data but I cannot suppress the key and re focus on the current txtbox...

Any way to not tab here?
Protected Overrides Function ProcessCmdKey(ByRef msg As Message, _
                           ByVal keyData As Keys) As Boolean
        Const WM_KEYDOWN As Integer = &H100
        Const WM_SYSKEYDOWN As Integer = &H104
        If ((msg.Msg = WM_KEYDOWN) Or (msg.Msg = WM_SYSKEYDOWN)) Then
            Select Case (keyData)
                Case Keys.Tab
                    'MsgBox("Tab Key Captured in the " + Me.ActiveControl.Name + " control!")
                    'I can do something based on the active control
                    Select Case Me.ActiveControl.Name
                          case TxtBox1
                               if not  validatedata1() then
                                   DON'T PROCESS TAB KEY!!!  ?????
                               end if
                    end select

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Question by:norway77

Expert Comment

ID: 24283283
DON'T PROCESS TAB KEY!!!  ????? = return true

simple as that

:) cheers
LVL 15

Accepted Solution

oobayly earned 2000 total points
ID: 24296599
How about using the Validating event for the control.

If you don't like the input in the textbox, then just set the Cancel property in the CancelEventArgs to true. This prevents focus from being set to another control.

Author Comment

ID: 24309245
that worked great.

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