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並前往https://www.coder.work/article/6355077

需要帮助以在构建图的上下文中找到与VCL TpaintBox.Canvas ...

Handle); //WindowFromDC retreive HWND from HDC hr:= pIVMRWindowlessCtrl.SetVideoClippingWindow(pWnd); // set the bounds of the video to the preview window ...

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