How to: Parse a Stream from a Binary Property to Read the TZREG Structure

This topic shows how to read the TZREG structure from the persisted format stored in the binary property PidLidTimeZoneStruct.

TZREG* BinToTZREG(ULONG cbReg, LPBYTE lpbReg)  
{ 
    if (!lpbReg) return NULL;  
 
    // Update this if parsing code is changed. 
    if (cbReg < 3*sizeof(long) + 2*sizeof(WORD) + 2*sizeof(SYSTEMTIME)) return NULL; 
 
    TZREG tzReg = {0}; 
    LPBYTE lpPtr = lpbReg; 
 
    tzReg.lBias = *((long*)lpPtr); 
    lpPtr += sizeof(long); 
    tzReg.lStandardBias = *((long*)lpPtr); 
    lpPtr += sizeof(long); 
    tzReg.lDaylightBias = *((long*)lpPtr); 
    lpPtr += sizeof(long); 
    lpPtr += sizeof(WORD);// reserved 
 
    tzReg.stStandardDate = *((SYSTEMTIME*)lpPtr); 
    lpPtr += sizeof(SYSTEMTIME); 
    lpPtr += sizeof(WORD);// reserved 
    tzReg.stDaylightDate = *((SYSTEMTIME*)lpPtr); 
    lpPtr += sizeof(SYSTEMTIME); 
 
    TZREG* ptzReg = NULL; 
    ptzReg = new TZREG; 
    if (ptzReg) 
    { 
        *ptzReg = tzReg; 
    } 
 
    return ptzReg; 
} 

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