Dear @mLipok, I have just successfully connected to a Firebird database using ADO.UDF http://firebirdsql.org/pdfmanual/Firebird-2.5-QuickStart.pdf   Func _Example_Firebird() ;http://firebirdsql.org/pdfmanual/Firebird-2.5-QuickStart.pdf Local $sDSN = 'Firebird' ; Default Local $sDatabase = @ScriptDir & '\firebird\showDB_ado.fdb' ; db name Local $sServer = 'localhost' ; Server IP Local $sPort = '3050' ; Port Local $sUser = 'sysdba'