1 wxWindow: Mother of all visible GUI objects

     2 wxFrame: A wm window (not a simple wxWindow) resizable by the user, with a title bar

     3 wxDialog: Similar to wxFrame, but can be modal.

     4 wxPanel: A wxWindow where the controls (other wxWindows) are placed. Like a

     5 Dialog placeable *not only* in a new wm window.

     6 

     7 Sizers

     8 ==========

     9 Any wxWindow can have a sizer: wxWindow::SetSizer().

    10 

    11 Features:

    12 - Border: pixels around each internal control

    13 - Minimal Size: set by each internal control

    14 - Alignment:

    15 - Stretch factor: (specified as 'proportion' to some sizers)

    16   - 0 : always minimum space for each control.

    17   - >1 : proportional size related to the sum of all control stretch factors.