利用::ClientToScreen将RECT转换为屏幕坐标

typedef struct tagPOINT {
LONG x;
LONG y;
} POINT, *PPOINT;

typedef struct _RECT {
LONG left;
LONG top;
LONG right;
LONG bottom;
} RECT, *PRECT;

BOOL ClientToScreen(
_In_     HWND hWnd,
_Inout_  LPPOINT lpPoint
);

//利用::ClientToScreen将RECT转换为屏幕坐标

RECT rctDest;

::GetClientRect(hWnd,&rctDest);

::ClientToScreen(hWnd, (LPPOINT)&rctDest.left);

::ClientToScreen(hWnd,
(LPPOINT)&rctDest.right);