Logon Property: RFCWithDialog 

Purpose

Enables supports RFC with SAP GUI (3.0C or later).

Returns

type Long.

Description

Set this property to a non-zero value when you want to start the SAPGUI before making RFC calls. The running SAPGUI allows you to call RFC functions that display SAP screens.

You can only use this property for connecting against R/3 Systems with Release 3.0C or later.