The STYLESTRUCT structure contains the window styles for a window.
typedef struct tagSTYLESTRUCT { // ss
DWORD styleOld;
DWORD styleNew;
} STYLESTRUCT, * LPSTYLESTRUCT;
Windows NT: Requires version 3.5 or later.
Windows: Requires Windows 95 or later.
Windows CE: Requires version 1.0 or later.
Header: Declared in winuser.h.
Windows Overview, Window Structures, WM_STYLECHANGED, WM_STYLECHANGING