是否有可以根据句柄画矩形的功能？

[rwerplus]

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[flaot]

说的应该是窗口句柄吧 使用接口GetClientRect获取窗口在桌面的位置及大小 然后用win32API创建自定义透明窗口，在窗口中用GDI函数画矩形