Invokes the default window procedure associated with this window.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The following code example demonstrates intercepting operating system window messages in a window procedure. The example creates a class that inherits from NativeWindow to accomplish this.
The MyNativeWindowListener class hooks into the window procedure of the form passed into the constructor, and overrides the method to intercept the WM_ACTIVATEAPP window message. The class demonstrates the use of the AssignHandle and ReleaseHandle methods to identify the window handle the NativeWindow will use. The handle is assigned based upon the Control.HandleCreated and Control.HandleDestroyed events. When the WM_ACTIVATEAPP window message is received, the class calls the form1 ApplicationActivated method.