WebDynpro for ABAP F4-help for KAGRU like PERFORM f4_groups in KSB1

Hello,
I must realize a search-help in a WebDynpro-Component which looks like the F4-help in the transaction KSB1 for field KAGRU.
In the report RKAEP000 it looks like this.
AT SELECTION-SCREEN ON VALUE-REQUEST FOR koagr.
PERFORM f4_groups USING    'KSTAR'
                             gs_tka01-ktopl
                    CHANGING koagr.
But in WebDynpro the Function   'K_GROUP_SELECT' wil generate a short dump.
Has anybody an idea, how to make this in WebDynpro?
Greetings

How are you trying to use the search help? You can set up value help in the component itself. Go to the component controller context of your web dynpro component. Select the context node attribute for which you would like to have value help. Now go down to the properties. Next to "Input Help Mode" select "Automatic". If your node attributes were brought in from a table (SAP or custom), then if there is an existing search help it will automatically be brought up now next to "Determined Input Help". Save your changes and activate.
If a search help is not brought in when you change the input help mode to automatic, then you can still create your own method to provide the search help. In this case you will need to create your method in the controller of the view where the user will be entering a value for the field. The method type should be "Method". Make sure to call your search help method within the method WDDOINIT of the view. In the search help method you will need to navigate to your mode, select the values for the field, and then set the attribute value set using those values. You will have to look into K_GROUP_SELECT to see where it is getting the values for KAGRU. I don't think you can call K_GROUP_SELECT directly because it creates a pop-up.
A third option is to use an OVS (object value selector) component. Please see this document for help with OVS:
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/cf40cf90-0201-0010-4a85-e5a207b900d8
I hope this helps.
- April King

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