>>>(1) The short way is to cast the return result to UInteger, and change the return type of GetCrc32() to UInteger
>>
>>This line cannot be changed to UInteger:
>>
>>

>>        Dim lnCRC32Result As Integer = &HFFFFFFFF
>>

>>
>>It would give an error: "Constant expression not representable in type 'UInteger"
>
>Yes, it seems vb interpretes those as signed
>
>http://msdn.microsoft.com/en-us/library/s9cz43ek.aspx
>
>Append the type to the constant. U and I
>

>    Dim lnCRC32Result As UInteger = &HFFFFFFFFUI
>

There you go! Thx, didn't know that syntax existed :-{