C#海康威视热成像NET_DVR_GetSTDAbility参数等代码段

            NET_DVR_STD_ABILITY myNET_DVR_STD_ABILITY = new NET_DVR_STD_ABILITY();
            int XML_ABILITY_OUT_LEN =2 * 1024 * 1024;
            IntPtr pOutBuf = Marshal.AllocHGlobal(XML_ABILITY_OUT_LEN);
           
            char* aChar = (char*)System.Runtime.InteropServices.Marshal.StringToHGlobalAnsi(1+"").ToPointer();
            myNET_DVR_STD_ABILITY.lpCondBuffer =(IntPtr)aChar; 
            myNET_DVR_STD_ABILITY.dwCondSize = sizeof(int);
         
            myNET_DVR_STD_ABILITY.lpOutBuffer = pOutBuf;
            myNET_DVR_STD_ABILITY.dwOutSize =XML_ABILITY_OUT_LEN;
            myNET_DVR_STD_ABILITY.lpStatusBuffer = pOutBuf;
            myNET_DVR_STD_ABILITY.dwStatusSize = XML_ABILITY_OUT_LEN;
            bool bitResult = CHCNetSDK.NET_DVR_GetSTDAbility(m_lUserID, 3621, ref myNET_DVR_STD_ABILITY);
            if (!bitResult)
            {
                uint nError = CHCNetSDK.NET_DVR_GetLastError();
            }

            string strResult = Marshal.PtrToStringAnsi(pOutBuf, XML_ABILITY_OUT_LEN);