最近一直都纳闷为什么每次reset窗口的时候，就会在ID3DXEffect->end（）的地方crash掉。今天才知道原因哦。还是感谢下同事的积极配合和帮助哦。

在reset设备之前，一定要ID3DXEffect->OnLostDevice();SDK里有这么一段话

This method should be called whenever the device is lost or before the user calls IDirect3DDevice9::Reset. Even if the device was not actually lost, ID3DXEffect::OnLostDevice is responsible for freeing stateblocks and other resources that may need to be released before resetting the device.

然后再reset设备；最后再调用ID3DXEffect->OnResetDevice（）接口哦。