HR_INFOTYPE_OPERATION - How Maintain Text for IT0015

Hi

I am using the FM HR_INFOTYPE_OPERATION to change the lock indicator on an Additional Payments record (infotype 0015) which works fine. There is a requirement to also add some text to the record via Maintain text. In structure p0015 there is a field ITXEX (Text exists for infotype flag) but the actual text is not stored in the structure.

Is it possible to use this FM HR_INFOTYPE_OPERATION to add maintain text to IT0015?

Thanks for your help in advance.

Daniel