怎样让对话框程序“不失去”焦点？

Question

我在一个对话框程序中用mouse_event向另一个程序模拟鼠标单击后，焦点就失去了，转到被单击的程序上了，我想让焦点回到原来的对话框程序上，该怎么做？
POINT Point;
GetCursorPos(&Point); //模拟鼠标拖动
SetCursorPos(point1.x, point1.y);
mouse_event(MOUSEEVENTF_LEFTDOWN,0,0,0,0);
mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0); SetCursorPos(Point.x, Point.y);在函数的末尾放SetFocus()不起作用呀