Calling an Executable program in a Web dynpro

Hi
We would like to change the initial screen of one of our functionalities (kilometre claims), but the info after you submit the selection info does not need to change. We have an executable program with the detail of the screen.
I created a new Web dynpro application with the select options that must be entered; if you then click on a Submit button, I would like to call the current executable program, but I am not sure how I must do this.
Example:
To call a method, I always use: Call method ZCL_WD_PA=>ZHRPA_UPDATE_IT9004, but I am not sure how to call an executable program and with info is needed.
Could anyone please assist?
Regards
Debbie

Hi
We have a functionality via Employee Self-Service (Portal ECC6) where an employee can view their Kilometre claimsin a Report format.
To get the info to be displayed, someone else created a Program via the GUi SE38 (Attribute is an Executable program). The front screen (selection screen) where the dates for which you would like to run the report for, needs to be changed. It is not a nice screen to look at. On that same screen which I would like to change, is a submit button. If you click on that, it shows info and that info must not be changed at all.
So I will also have a submit button on my new Web dynpro functionality where I am building hopefully a nicer selection screen. I will also have a Submit button and I wanted to add something when clicking on this submit button to call the existing program that will show the info selected.
Regards
Debbie

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Hello
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dummy TYPE c,
rmzhl(8) TYPE c, " LIKE rihafvr-rmzhl,
ernam LIKE rihafvr-ernam,
aufnr LIKE rihafvr-aufnr,
vornr LIKE rihafvr-vornr,
aueru LIKE rihafvr-aueru,
ltxa1 LIKE rihafvr-ltxa1,
grund LIKE rihafvr-grund,
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DATA i_iw47 LIKE TABLE OF wa_iw47.
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DATA: BEGIN OF wa,
 name(3000) TYPE c,
 END OF wa,
 itab LIKE TABLE OF wa.
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 TABLES
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 text
--> p1 text
<-- p2 text
FORM iw47_back_header.
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w_event = c_event.
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TARGET_INSTANCE = ' '
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 eventid_does_not_exist = 2
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 OTHERS = 5.
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Add exception check
IF sy-subrc NE 0.
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 'RC = ' sy-subrc.
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[code]
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