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Unit 3: Windows Programming
WNDCLASSEX WndCls; Notes
. . .
RegisterClassEx(&WndClsEx);
CreateWindow(. . .);
}
If you are preparing to use the window further in your application, you should recover the
result of the CreateWindow() or the CreateWindowEx() function, which is a handle to the
window that is being generated. To perform this, you can state an HWND variable and initialize
it with the create function. This can be completed as follows:
INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow)
{
HWND hWnd;
WNDCLASSEX WndClsEx;
. . .
RegisterClassEx(&WndClsEx);
hWnd = CreateWindow(. . .);
}
Self Assessment
Fill in the blanks:
10. The WNDLCLASS and the ......................... classes are utilized to initialize the application
window class.
11. To create a window, you can call either the CreateWindow() or the ......................... function.
3.6 Message Processing Function WndProc()
An application-defined function that processes messages sent to a window. The WNDPROC
type defines a pointer to this callback function.
WindowProc is a placeholder for the application-defined function name.
Syntax
LRESULT CALLBACK WindowProc(
__in HWND hwnd,
__in UINT uMsg,
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