Pass multiple selection to CJI3 by ABAP programming

Hello All,

I am now writing a ABAP dialog program (via SE80), In the program, user is allowed to select multiple WBS in the grid and then click a button to call SAP standard transaction CJI3. What I want to do is auto. fill in the multiple WBS into multiple selection of CJI3.

I have search some forum and the solutions are using parameter ID, but parameter ID can only handle single value.  May I ask how to pass multiple selection to CJI3 by ABAP programming?

Many Thanks for your advise.

Sunny