Does The Function SQLGetDiagRec Work Properly For Unicode

Hi
I am writing a application using the ODBC Calls to connect to MSSQL Database 2005 SP2.
I am using the Microsoft Visual Studio 6.0 for compilation

I have defined the UNICODE macro in the project settings.
Now when i am trying to connect to MSSQL Database using this call below

retcode = SQLConnect(dbc, (SQLTCHAR*) dsn, SQL_NTS,
(SQLTCHAR*) loginname, SQL_NTS,
(SQLTCHAR*) password, SQL_NTS);

I give a wrong username .
Then i use the function
SQLGetDiagRec to collect the error

void extract_error(char *fn,SQLHANDLE handle, SQLSMALLINT type)
{
SQLINTEGER i = 0;
SQLINTEGER native;
SQLTCHAR state[ 100 ] ;
SQLTCHAR text[256];
SQLSMALLINT len;
SQLRETURN ret;
memset(state,0,sizeof(state));
memset(text,0,sizeof(text));
fprintf(stderr,
"
"
"The driver reported the following diagnostics whilst running "
"%s

",
fn);
do
{
ret = SQLGetDiagRec(type,
handle,
++i,
state,
&native,
text,
sizeof(text),
&len );



if (SQL_SUCCEEDED(ret))
_stprintf(_T("%s:%ld:%ld:%s
"), (const TCHAR *)state, i, native, text);
_stprintf(_T("Error code %s
"),(const TCHAR *)state);
}
while( ret == SQL_SUCCESS );
}



Now if i check the values of "state" and "native" i get it as 0.

If i use non unicode (i.e. remove the UNICODE macro) it works fine.

Best Regards
Manoj