Marc,
Try:

SQLSetProp(0, 'DispLogin', 3)      && prevent ODBC login dialog if we cannot connect
SQLSetProp(0, 'DispWarnings', .f.) && prevent ODBC error messages

HTH
>In my application, I use the command SqlStringConnect() to access
>a SQL Server database. However, when the connection failed, I get
>a window to enter UserId and Password. Is it possible to NOT display
>that window?