ABAP: create Popup for Input in selection Table for longer strings

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Hello,

I am new in ABAP programming.

I have created an application with SE38, in this application I call a table from an selection-screen. I pass a variable which I got from the selection-screen and call data from an InfoProvider that I have created.

Now in this table the user has to enter some data into certain fields.

There is a character field with a length of 60. This is not enough.

I know that it is possible to have an InfoObject with attributes and split a string into the attributes to transport string with a longer length than 60.

But my inputfield in the table doesn't give me the possiblity to enter data that is longer.

So I am asking here if it is possible to access that field and call an inputfield somehow?

I need an inputfield where I can enter data that is longer than 60 characters (maybe about 600) and after submitting it has to be splittet into several hidden fields. After saving of the table I will call a process-chain which will transfer the data from the table back into the InfoProvider.

If you need any more informations about my application please let me know, I don't know if my question is clear enough..

Regards

Martin