Maintaining Plug-Ins and Opening a Structure: BAPIs 
Prerequisites
You have created a form in Visual Basic and have launched the
SAPforms Designer as an add-in and are in the main window. The form controls are shown in the table displayed in the bottom control.
The procedure described below is the same if you are using the
Procedure
The SAPforms RFC Logon - System Selection dialog box is then displayed.
You can find out which R/3 Systems you are already logged on to on the tab page Recent. You can also select an existing logon.
The interface description of the BAPI is exported from R/3 and displayed as a tree in the top control of the main SAPforms Designer window.

You do not need to maintain the plug-ins on a separate screen for this form application. You have already declared the
The value in the SAPforms Plug-In box is set by default according to the form development environment you are using. If you are using the stand-alone version of the SAPforms Designer, you must also maintain this plug-in.
Result
You can now
define the binding.