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);