Change standard F4-Help

Hello guys,

I'm writing a little report for training & event.

I have standard the objecttype on that screen & an objectid. If i click on the f4-button, i get the standard F4 help, with too much information... I only need 5 different objecttypes but the standard F4 help gives me more than 100.

When i tried to write my own F4 help for that field, and i used the command :

at selection-screen on value-request for pchotype.

then i get an errormessage : <i>The addition "ON VALUE REQUEST FOR" is not allowed with database-specific PARAMETERS or SELECT-OPTIONS.</i>

Does anyone has a solution for this?

Kind regards,

Tom