Accessing SAP GUI for JAVA from a java code

Hello Friends

We have written a JAVA code using SAP JCo (Java Connectors) which calls a standard BAPI which calls a transaction screen in SAP.

But when we execute the code, the screen does not come. We are using SAP GUI for JAVA jar file.

How can we access the transaction screen using SAP GUI for JAVA using this Java code??

kindly guide....

Best Regards