Hi tssivakumar,
You will have to add a textbox on your approver view (Multi-Line) and on the Submit you will have to write the comments to a SmartObject.
My suggestion here would be to create a SmartObject as follows:
Name: MyWorkflowComments
Fields:
ID (Autonumber)
Comment (Memo)
ExpenseID (Number) **NOTE: This field name should be something to identify the current Process, in case of a Leave Request you will make this a LeaveRequestID, etc
SubmittedBy (Text)
SubmittedDate (DateTime)
Then on the Submit Rule, before you action your workflow, run the SmartObject Create method and set the following values:
ID: No value - This is autonumber
Comment: The Comment text box
ExpenseID: This is the field to identify the current process or item
SubmittedBy: The current user that submitted the comment
SubmittedDate: Current Date and Time
-Jean