I'm try to get the keypad subtract key to work the same way as the main
minus key on columns in a winform datagrid. To do this, I've overridden the
DataGrid's ProcessKeyPreview method. In the method, I change the params to
ones that come in when the minus key (above the main keyboard) is in the
message. But, for some reason this doesn't work. I thought that with the
Message being passed by reference, I could make any changes I needed to on
it.
protected unsafe override bool ProcessKeyPreview(ref Message m) {
if (m.WParam.ToInt32() == 109) {
m.WParam = new IntPtr(189);
m.LParam = new IntPtr(786433);
m.Msg = 256;
}
return base.ProcessKeyPreview(ref m);
}
BTW, I'm setting the LParam and Msg temporarily, just until I get it
working. Then I do plan on ORing with the correct flags in the LParam.
If there is a better way, I would like to know it, as with this method, I
have to allow unsafe code. But, why doesn't this work?
Thanks,
Erick
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