Invokes the default window procedure associated with this window.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Typically, you only call the method when you are intercepting window messages and would like the default window procedure to handle the message. should not be called to send a window message to the window; call the Win32 SendMessage function instead.
It is an error to call when the Handle property is 0.Notes to Inheritors
Override this method in a derived class to implement generalized custom message handling for a specific native window or .NET Windows Forms Control. Custom processing can be performed before, after, or instead of a call to the base class implementation of this method, which performs standard message processing.