Retrieving Cursor Position from Screen.

Hi,

Dealing with a screen and window subfile.
The program gets the USER IDs from a file when F4 is pressed on the screen.
Right now, the program is working fine. It pops up the list of USER IDs when
F4 is pressed on the screen.
The problem I am facing is, I want this window to be popped up only when the
cursor is within the range of particular field.


 The Screen is :


     Send CSV file in CCMAIL folder
     ------------------------------



   Enter Fiscal Year :      99

   Enter Period      :      99-

   Enter USER ID to  :      OOOOOOOO  F4 to get the list
   get the mail




                                                     F3: Exit

Here, I want the window to be popped up only if the cursor is at USER ID
field, for which I will have to get the cursor position (row/column). Right
now, program pops up window irrespective of the cursor position i.e. u press
F4 anywhere on the screen, window will pop up.

Does anybody know how to get these row, column values and how to handle them
in RPG?
The one I tried was RTNCSRLOC, but couldnt get much out of it.



Thanks and Regards,
Gauri.