Docking Pane : Dialog Panel Minimized not working

Hi 

I have created a dialog box application having two panel such as follows:-

CXTPDockingPane* pwndPane1 = m_paneManager.CreatePane(IDR_PANE1, XTP_DPI(CRect(0, 0, 263, 320)), xtpPaneDockMiniWnd);

 CXTPDockingPane* pwndPane2 = m_paneManager.CreatePane(IDR_PANE2, XTP_DPI(CRect(0, 0, 200, 320)), xtpPaneDockRight, pwndPane1); 

when I click on pane1, it should be minimized and clicking the mimize tab will open it back, similar to outlook bar panel style.

But its not working for me.

I changed the  code:-

Using the above code, I am able to achive outlook style panel,

but now both the panel won't fit in the dialog box and there is some additional space left on the right side of panel 2

I try to increase the size of panel 1 or panel 2 , but it is keeping the space on the right side always

I would like to add two panel in the dialog based and match it with the style of outlook panel, where clicking on any auto hide, make that panel minimized and appear as iamge showed below

and panel 2 occupy whole screen 

Please suggest me the right approach to do so?