Winform suddenly does not respond to KeyEvent

Winform suddenly does not respond to KeyEvent

The KeyEvent of WINFORM is valid at the beginning.

After using some controls to set its MouseEvent, Winform suddenly does not respond to KeyEvent !!

Follow these steps:

1. Set Form. KeyPreview to True first. KeyPreview is used to determine whether the Keyboard Events of the controls on the form have been registered with the form. After I set the preceding settings, the Form KeyEvent is active again.

If not, press 2.

2. You need to reload this function protected override bool ProcessDialogKey (Keys keyData)

References:

Http://m.myexception.cn/c-sharp/78949.html