CommonULong64 OverflowException

Posted By bikemike on 08/10/2007 9:26 AM

All "bashing" aside, your help has been invaluable and I cannot thank you enough! Below is the final function that resolved the issue:

Public Shared Function Build64(ByVal value As Object) As UInt64
        Return (Convert.ToUInt64(value.high) << 32) Or (Convert.ToUInt64((value.low >> 16) And &HFFFF) << 16) Or Convert.ToUInt64(value.low And &HFFFF)
End Function

Hopefully this will help others in the VB world with the same problem...

Mike, looks basically good, but you have one problem... You're word-swapping the low DWORD and not the high DWORD. They both need it because of the way the CPU stores DWORDS. Just do the top in 16 bit chunks just like you did the bottom, and this should be good for any value.

Don.