How can i launch manual runner through workflow?

Hi all,

i have a task, for which i need to create a button which when clicked will run manual runner for given test instance.

i know there is already a button to run with manual runner. But for functionality i am working requires an another button with same feature.

So please if somebody can tell me how can i launch Manual runner through workflow. i have tried.

Actions.Action("act_run").Execute = true

but no luck :( . , i have tried to search for it in OTA guide as well didn't get anything, so please if somebody can let me know how can i launch manual runner through Script.

Thanks in advance.