if( i == 0 )
- memcpy( &lpSpData->dwReserved1, returnBuffer, sizeof(lpSpData->dwReserved1) );
+ sscanf(returnBuffer, "%x", &lpSpData->dwReserved1);

Couldnt you use:
strcpy(lpSpData->dwReserved1,returnBuffer);

Sorry for only replying now; Your solution is equivalent, except that it is looks more complicated

regards,

Joris

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