Call a function module from the R/3 system using the SAP Function Control and display the data in a table using the Table View Control.

The application shall

• be written in Visual Basic and use ActiveX Controls.
• call function module RFC_CUSTOMER_GET to display the customer data from the R/3 system.
• provide a view on table CUSTOMER_T and display R/3 data in a formatted table.

In this unit you will learn how to

• program a simple graphical interface in VB for calling a function module.
• refer to object variables.
• log on to and off from the SAP system using the Function Control.
• prepare import parameters for passing values.
• execute simple function calls using the Function Control.
• display R/3 data in a table using the Table View Control.
• assign program steps to the components in the R/3 architecture.

The Function Control is an OCX control that allows external VB applications to remotely call the R/3 system. It is based on the OLE Automation technology and allows you to handle parameters, data transfer, and function calls very comfortably.

The Function Control acts as container for a collective object and for the specific function objects. To use the Control, you must first create a collective object using the VB statement CreateObject. To connect to the R/3 system, you need a connection object. You can get this object either via the Logon Control or directly as a property of the newly created collective object. You get any further objects, such as the specific function objects, from the underlying object hierarchy by calling methods or properties.

or