onKeyPress event do not work if a textbox in form has autocomplete?

I have a form with keypreview true. OnKeyPress (if key is escape) I was closing the form.

Later I set autocomplete with the first text box in form. Autocomplete is working but OnKeyPress event is not working now. If cursor is not in text box having auto-complete OnKeyPress works and still close the form on escape key.

Please guide how I开发者_如何学Python can have both ? Autocomplete with closing form on escape.

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In your application you should not use form events for closing (because any control on your form can handle OnKeyPress by it's own and swallow it), you should register the hotkey.

[DllImport("user32.dll")]
private static extern bool RegisterHotKey (int hwnd, int id, int fsModifiers, int vk);

[DllImport("user32.dll")]
private static extern bool UnregisterHotKey (int hwnd, int id);

Refer to here or to here