HOW can I disable tabkey in C # ?

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just to disable Tab key in all over my windows form application, because when the user hit Tab key validation routine in textbox skipped

What I have tried:

C#

{
            if (e.KeyCode == Keys.Enter)
 
            {
   
            }

           e.Handled = ProcessKeyDown(e.KeyCode);
           SendKeys.Send("{TAB}");
           if (e.KeyCode == Keys.Tab && string.IsNullOrEmpty(textBox1.Text))
          {
              textBox1.Focus();
               return;

Posted 25-Aug-20 4:38am

Member 14922568

Updated 25-Aug-20 6:48am

PIEBALDconsult

v2

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OriginalGriff · Accepted Answer · 2020-08-25T04:48:00

Don't even try to disable TAB - you will annoy more users that you can believe ...

Instead, do the validation when you leave the TextBox - there is an event for just that (or in fact several):
Control.Leave Event (System.Windows.Forms) | Microsoft Docs[^]
Control.LostFocus Event (System.Windows.Forms) | Microsoft Docs[^]
Control.Validating Event (System.Windows.Forms) | Microsoft Docs[^]
have a look and decide which is best - but disabling "standard navigation" controls is never a good idea - users will hate it, and by extension your app and you!