/// <summary> /// 开启显示图片叠加控制 /// </summary> /// <param name="hWnd">显示图片的窗口句柄</param> /// <param name="dwUserData"></param> /// <returns>返回操作标示句柄</returns> public UInt32 Pdo_Open(IntPtr hWnd, UInt32 dwUserData) { MyLog4Net.ILogExtension.DebugWithDebugView(MyLog4Net.Container.Instance.Log, "IVXSDKProtocol Pdo_Open hWnd:" + hWnd); m_pfuncMouseEventCb = OnPDOMouseOptNtfCB; UInt32 phPdoHandle = 0; UInt32 retVal = IVXSDKProtocol.Pdo_Open(hWnd, null, dwUserData, out phPdoHandle); //if (0 != retVal) //{ // // 调用失败,抛异常 // CheckError(); //} MyLog4Net.ILogExtension.DebugWithDebugView(MyLog4Net.Container.Instance.Log, "IVXSDKProtocol Pdo_Open ret:" + retVal); return(phPdoHandle); }