OdbcCommand Parameter

["Luca Beretta" <luca(dot)beretta(at)dataelco(dot)it>]

hi to all,
i'm using C# to write an application based on postgresql 8.0 beta 2 (win32),
and i'm experiencing a problem using .NET Framework OdbcCommand class:
i need to pass some OdbcParameter, but i don't know how kind of name i need
to use for pgsql SQL sentence; with MS SQL Server i call them @param1
@param2, ecc

but if i do this with pgsql odbc 7.05.00.02 i get this error

[OdbcException: ERROR [HY000] ERROR:  operator does not exist: @@ character
varying]

i think it depends by parameters names, so tried @@param,$param,%param but i
get always
the same exception.

which is the right mode ?
 
thanks a lot