I have a need to perform a resize of two objects within a form. I already know how to resize the objects if the form is resized; so please don't talk about Form resizing.

What I am looking for is a sizer object which is placed between two objects in order to make one larger and the other smaller.

Treeview = 100 pixels wide
Listview = 100 pixels wide


Treeview Sizer ListView
100 3 100


Resize to the left 20

Treeview Sizer ListView
80 3 120