>>>>>>>>>(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 :-{
>>>>>
>>>>>Well, you know more vb than I do -
>>>>I know VB just well enough to work with it where it maps pretty straightforwardly to C# and that's about it.
>>>>>I just googled my way through
>>>>And I was too lazy :-}
>>>
>>>
>>>I just had the impression you were not in favour of unsigned types ;)
>>
>>As in my post to Michel this AM - for the case in point I just think Int32 is preferable ....
>
>
>Yeah, I read that post
>
>The data is the same, it's just the way looking at it that differs
>
>Michel did not want negative numbers, hence the suggestion to use unsigned
>
>And thinking about it - there must be a reason why unsigned was invented

I assume simply so that you can store a larger positive number is a 32 bit structure.
BTW, did you read the link that John referenced earlier....