How to create callable object which implements GP interface

Hi experts ,
I am very new to GP . I want to create a simple process , in which employee send an request to HR and then HR approves it. for this I am using two process and two callable object . I can create simple WD java project , but how we can call it , and where can i define input and out put , I dont know .
I have also gone through a PDF which talks about this same thing but i dont know why its adding a dc in projeact and adding dependencies .
can anyone tell me what is mainly required to convert a simple wd java application to a callable wd java appliaction .
Thanks in advance
Abhay

Hi,
There are only 2 zip files you need to extract.
Location to Extract gp_api_nw04s.zip=>C:\Program Files\SAP\IDE\IDE70\eclipse\plugins\com.sap.tc.ap_2.0.0\comp\CAF\DCs\sap.com\caf\eu\gp
Location to Extract gp_TopLevelDcs.zip=>C:\Program Files\SAP\IDE\IDE70\eclipse\plugins\com.sap.tc.ap_2.0.0\comp\CAF\SCs\sap.com\CAF\_comp\TopLevelDCs
Very simple.
Then in your DC project expand the tree of your previously created DC and
navigate to DC MetaData->DC Definition ->Used DCs
Right click on the node Used DCs and click on Add Used DC
Add both the api's separetely,
Choose caf/eu/gp/api -> DC MetaData -> Public Parts -> external
Choose caf/eu/gp/api/wd -> DC MetaData -> Public Parts -> GPWebDynproCO.
For Dependency Type select Build Time, Deploy Time, and Run Time for both.
Finally ,
Define Web Dynpro References for your DC
a. Right click on your DC b. Click Properties
Select entry Web Dynpro References
a. Select tab page Library References
b. Choose Add
c. Enter the reference cafeugp~api
Now your project is ready for GP development.
Hope it help you...
Award points if it helps you...
Regards,
Nirmal Sivakumar G

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