private static string getErrorMsg(uint errorCode)        {             string errorMsg = null;            switch (errorCode)            {                 case 0x80040200: //VFW_E_INVALIDMEDIATYPE                    errorMsg = "An invalid media type was specified";                    break;                case 0x80040201: //VFW_E_INVALIDSUBTYPE                    errorMsg = "An invalid media subtype was specified";                    break;                case 0x80040202: //VFW_E_NEED_OWNER                    errorMsg = "This object can only be created as an aggregated object";                    break;                case 0x80040203: //VFW_E_ENUM_OUT_OF_SYNC                    errorMsg = "The enumerator has become invalid";                    break;                case 0x80040204: //VFW_E_ALREADY_CONNECTED                    errorMsg = "At least one of the pins involved in the operation is already connected";                    break;                case 0x80040205: //VFW_E_FILTER_ACTIVE                    errorMsg = "This operation cannot be performed because the filter is active";                    break;                case 0x80040206: //VFW_E_NO_TYPES                    errorMsg = "One of the specified pins supports no media types";                    break;                case 0x80040207: //VFW_E_NO_ACCEPTABLE_TYPES                    errorMsg = "There is no common media type between these pins";                    break;                case 0x80040208: //VFW_E_INVALID_DIRECTION                    errorMsg = "Two pins of the same direction cannot be connected together";                    break;                case 0x80040209: //VFW_E_NOT_CONNECTED                    errorMsg = "The operation cannot be performed because the pins are not connected";                    break;                case 0x80040210: //VFW_E_NO_ALLOCATOR                    errorMsg = "No sample buffer allocator is available";                    break;                case 0x80040211: //VFW_E_NOT_COMMITTED                    errorMsg = "Cannot allocate a sample when the allocator is not active";                    break;                case 0x80040212: //VFW_E_SIZENOTSET                    errorMsg = "Cannot allocate memory because no size has been set";                    break;                case 0x80040213: //VFW_E_NO_CLOCK                    errorMsg = "Cannot lock for synchronization because no clock has been defined";                    break;                case 0x80040214: //VFW_E_NO_SINK                    errorMsg = "Quality messages could not be sent because no quality sink has been defined";                    break;                case 0x80040215: //VFW_E_NO_INTERFACE                    errorMsg = "A required interface h