How to remove key after KeyPreview

[CBonnkirch]

Hi together,

in the forum, i found lots of samples on how to use the door lib on the device. However, i did not found any sample for removing a key from the queue after "processing" it.

I want to catch and process some special keys (like cursor) in a text box. All other keys should simply pass through.

Thanks
Christof

 

[specci48]

Hello CBonnkirch,

I think you are missing the IgnoreKey method after you have catched your "special" keys.

E.g.

Sub TextBox1_KeyPress (key)
   If key = Chr(46) Or key = "5" Then 
      ' do something other
      TextBox1.IgnoreKey
   End If
End Sub

specci48

 

[agraham]

KeyPress only catches character keys, you need to trap KeyDown to see other keys. See this demo and the following links for the EventArgs fields.

KeyPressEventArgs Class (System.Windows.Forms)

KeyEventArgs Class (System.Windows.Forms)

The demo shows using the Form and KeyPreview but you can also trap KeyDown for a Textbox.

 

[CBonnkirch]

Thanks Agraham,

this was exacly what i was searching for.

Christof