set as frame's tool-, menu- and statusbar respectively.
+wxMDIParentFrame
+----------------
+
+Supports same attributes and children nodes as wxFrame. Additionally, children
+may be of the wxMDIChildFrame type.
+
+
+wxMDIChildFrame
+---------------
+
+Supports same attributes and children nodes as wxFrame.
+
+
wxScrolledWindow
----------------
pos Position -1,-1