Question

I have complex UserControl (grid, edit controls for grid, etc…) and I want handle CTRL+C keyboard shortcut, however I don’t want disable a native functions by edit controls (textboxes, comboboxes, etc…). If the CTRL+C is not handled by other inner controls I want handle it by myself (copy whole row(s) from grid, etc…).

I tried override WndProc method in UserControl and check for WM_COPY and WM_COPYDATA, but it doesn’t work. It works only on final target control (TextBox for example).

Answer 1

You can do this by overriding ProcessCmdKey(). Check if a text box has the focus. For example:

    protected override bool ProcessCmdKey(ref Message msg, Keys keyData) {
        if (keyData == (Keys.Control | Keys.C)) {
            var box = this.ActiveControl as TextBoxBase;
            if (box == null) {
                // Do your stuff
                MessageBox.Show("Copy!");
                return true;
            }
        }
        return base.ProcessCmdKey(ref msg, keyData);
    }