Trigger BPM process from Web Dynpro application

Hello All,

I have a simple business process with two ui activities. I am able to start the process from NWA -> Process Repository.

But, I need to start the process from the application. Here is the requirement:

User opens the application. ON completion, the BPM process for approval needs to be triggered. How do i access/obtain process?

If I need to call a particular task in process, How do i do that?

Kindly assist.

Thank you.

Regards,

Sharath