In Zoho Creator, I understand there’s a concept of running a workflow *while* a form is being populated. So you could execute code as the user populares fields, before submission. 

In Zoho CRM Task creation, I want to do something similar. I have exhausted what the Layout and Validation rules can do though…

My need is this: based on a custom “Task Type” drop down selection (required field) I want trigger a Deluge function to auto-populate the system required Subject field in Task based on the Task Type selection. But to do that, I need to execute code *while* the task Is being created, not after it is created. Layout rules only let me show fields. Validation rules only let me check a value and show an error. I need to pre populate a value at form fill time to dynamically give a custom subject line. Does that make sense?

Is this possible in native Zoho CRM Tasks, similar to how it seems Zoho Creator runtime form workflows would allow?