property AsDoubleWord: Longword;

AsDoubleWord is a LongWord property that represents the IP address or network mask as a unsigned integer value. AsDoubleWord calls SetAll to update the value of the individual bytes in the IP address. 

Use Byte1, Byte2, Byte3, Byte4, AsBinaryString, or AsString to access the value of the IP address in other representations.

AIP.FullAddr := ANetCalc.NetworkAddress.AsDoubleWord AND ANetCalc.NetworkMask.AsDoubleWord;