title: How do I set a minimum window size in wxWidgets?
body: <p>This is the hierarchy of widgets I've got:</p>
  
  <p>Frame > wxBoxSizer > wxPanel > wxBoxSizer > wxFlexGridSizer (2 columns, 9 rows), with assorted form fields and buttons inside.</p>
  
  <p>The first BoxSizer is to place the panel in, and the second is to make a border around the FlexGrid.</p>
  
  <p>Everything looks nice, and the frame can expand properly if the window is enlarged, but it also can be resized to almost nothing, hiding all form elements.</p>
  
  <p>How do I force the minimum size for the window to the one suggested by the FlexGridSizer by default (all form elements visible and having their minimal possible sizes)?</p>