This function disconnects the connection identified by the ConnectionName parameter. All other parameters are ignored.
unsigned int db_string_disconnect( SQLCA * sqlca, char * parms );
"UID=DBA;PWD=sql;DBF=c:\\db\\mydatabase.db"
Non-zero if successful; 0 otherwise.
If no ConnectionName parameter is specified in the string, the unnamed connection is disconnected. This is equivalent to the embedded SQL DISCONNECT statement. The return value is TRUE if a connection was successfully ended. Error information is returned in the SQLCA.
This function shuts down the database if it was started with the AutoStop=yes connection parameter and there are no other connections to the database. It also stops the server if it was started with the AutoStop=yes parameter and there are no other databases running.