Having some trouble to use MOIS

IIRC you have to use the handle of the Form instead of the Panel:
mInputMgr = MOIS.InputManager.CreateInputSystem((uint)myForm.Handle);


Any other input methods?

You can use the Key* and Mouse* events of the Panel.

If you don't need joystick input, there's no need to use Mois in a WinForms application.