Spreading the ALV-grid over the whole length of the screen

Hello,

I want, that the ALV-Grid I am displaying fills the whole screen, from left to right. I am using a custom container control but set the width of the dynpro and custom container manually. I want that the ALV-grid and dynpro automatically fill the whole space of the screen, from left to right. Is there a possibility to do this dynamically, e.x. with the splitter control? Thanks.

Regards, Lars.