>if there is a possibility to remove object from specific line on the form and replace by other objects on the same line.
>I know it sound bit strange
>thank you for your help
>Regards

Why not use pageframe with no tabs and change displayed page?
You can use RemoveObject and AddObject methods of the form if you insist on removing.
To get object on specific line of the form, you can use SYS(1270) - Object Location function.
HTH