>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
>

Thanks, in regards to that issue, yes, it does allows to define UInteger with HEX values.