public function OpenDSN
Prototype:
function OpenDSN(DSN, username, password)
Parameters
DSN
string containing the DSN
username
the username to use (as string)
password
the password to use (as string)
Description:
This function tries to connect to system or user DSN. If you want to use an ODBC connection string, you should also check
Open.
Return value:
Returns null if the connection fails or the connection handle if the connection is successful.