Unfortunately the Windows messages aren't defined anywhere in .NET; you'll have to pull the values out from the appropriate header file from the Platform SDK. HTH, James Sonork: Hasaki "I left there in the morning with their God tucked underneath my arm their half-assed smiles and the book of rules. So I asked this God a question and by way of firm reply, He said - I'm not the kind you have to wind up on Sundays." "Wind Up" from Aqualung, Jethro Tull 1971

you can try variant_t vtNull; vtNull.ChangeType(VT_NULL); and pass that. There is no constructor to make a variant NULL from the start. Also make sure the size parameter is 200 as your varchar is defined with a length of 200. :cool: