Avoiding Copy and Paste Functions in a Text Box

Copy (Ctrl+C) and Paste (Crtl+V) functions are already included in a text-box control, but what if you want to avoid these functions? You might suppose that you can handle Ctrl key combinations with the KeyDown event, but Crtl+C and Ctrl+V are not detected in the KeyDown event. The answer is to capture these key combinations in the KeyPress event. Type this line in the KeyPress event of the text box:

 
If keycode = 3 or keycode = 22 _
        then keycode = 0
' Where keycode = 3 is the combination 
' of Ctrl+C and keycode = 22 is 
' Ctrl+V.