Multiple panes uniform resize

[mRadziwon]

Hi all!

Recently I have faced an issue with resizing panes. I have a layout as in image below:

In green I have marked panes which should resize only horizonatally (splitters stick to top and bottom respectively), in blue the ones which should resize only vertically, and in cyan "free boxes".

My problem is that I cannot obtain soltion, where both cyan boxer remain equal widths (marked in red). Always one is resizingmore than the other.  Is my approach wrong?  Maybe there is a way to programatically set size of panes?

[Artem.SPb · Accepted solution]

You can set splitter position.
And panel size take from Panel->Bounds

[mRadziwon]

Thanks a lot!

Splitter position property is  the "global" position relative to window frame, or to whatever was set in splitter sizing? 

[Artem.SPb]

global