change position of say, get and button

[plantenkennis]

Hello,

If one resizes the window I want to be able to place the labels (say), get, buttons and browse on another position. How is this possible. I tried with SetPos(), but that did not do the trick.
Also I want to be able to change the size (height and width) of a browse when the main window is resized. Is there a command for this?