WNDCLASS Structure

WNDCLASS Structure:

Typedef Struct

{

 UINT Style;

 WNDPROC IpfnWndProc;

int cbClassExtra;

int cbWndExtra;

HInstance hInstance;

HIcon hIcon;

HCursor hCursor;

HBRUSH hbrBackground;

LPCTSTR LpszMenuName;

LPCTSTR LpszClassName;

} WNDClass, *pWNDClass;

·        The first property of the class is defined as the class style such as CS_HREDRAW, CS_VREDRAW.

·        This set the window procedure for window class to WndProc. This window procedure will process all message to all window.

·        The next fields are reserve some extra space in the class structure and the window structure.

·        HInstance create the instance of the program.

·        HIcon set an icon for all windows created based on this window class.

·        HCursor sets a cursor for all windows.

·        HBRUSH specify the background color of the client area.

·        LpszMenuName specify the window class menu.

·        LpszClassName specify the class name for program.