Displaying custom messages in BDC session instead of using SM35
I have a query regarding BDC session as this is the first time I am working on a BDC requirement. Now I do know that to check messages (error or success) using BDC session method, we need to go to SM35. Now in my requirement, the user has to upload the data from excel and after executing the BDC program, needs to see the error or success messages after the data has been uploaded. So, he/she does not not need to go to SM35 for the messages to be displayed.
So if I am using the session method (not call transaction!) to upload large volumes of data, how can I display the messages in the bdc program to the user without he/she going to SM35 ? Moreover the messages must be customized messages and not the ones used in the SM35 log for the purpose of simplicity.