Suppress key strokes in UserControl, ProcessKeyPreview

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Marius Horak - 20 Jun 2007 14:45 GMT

ProcessKeyPreview in a UserControl works fine to intercept most of the
keys. But I would like to suppress some keys.

private Keys keyMultiply = Keys.Multiply;

....
....

protected override bool ProcessKeyPreview(ref
System.Windows.Forms.Message msg)
{
if (msg.Msg == WM_KEYDOWN)
{
    if ((Int32)msg.WParam == (Int32)_keyPrintOrder)
    {
        MessageBox.Show("*");
        return true;
    }
}
return base.ProcessKeyPreview(ref msg);
}

When the active control is for example a textbox * will get to it
before MessageBox.Show is being shown. How come? How to suppress keys
in UserControl?

Thanks

MH

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carl.henrik.bache@gmail.com - 27 Jun 2007 10:28 GMT

try handle the KeyDown event.

private void test_KeyDown(object sender,
System.Windows.Forms.KeyEventArgs e)
{
if (e.KeyCode == Keys.Multiply)
e.Handled=true;
}

Calle

:-)

> ProcessKeyPreview in a UserControl works fine to intercept most of the
> keys. But I would like to suppress some keys.
[quoted text clipped - 26 lines]
>
> MH

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