Hiding a control without whitespace

Hi,

I am designing a windows form application, in that i have to hide a textbox and groupbox control based on the seleced item of a combo box. i used the "Visible" property as below:

Textbox1.Visible = false;

Groupbox1.Visible = false;

It hides the textbox and groupbox but the space occupied by them is get remained. Is there any way to hide the controls without having the white space.