//声明:
GetCursorPos(
  var lpPoint: TPoint {POINT 结构指针, 接收鼠标指针的屏幕坐标}
): BOOL;


//举例:
var
  pt: TPoint;
begin
  GetCursorPos(pt);
  ShowMessage(Format('ScreenX: %d; ScreenY: %d', [pt.X, pt.Y]));
end;