This message is sent during the window creation process.
A pointer to an instance of the class WindowCreate containing the creation parameters for the window.
|true||Window creation is continued.|
|false||Window creation is terminated and the window is destroyed.|
The message is sent after the window is created but prior to it being made visible. It is sent during the execution of the function CreateWindow - Extended; and if false is returned by this message, a null window handle is returned by the function.
This message is sent prior to the message Message::Create being sent.