title: How can I show a bitmap in wxGrid header cell?
body: <p>Using wxPython I want to render a bitmap only in the upper left grid corner cell of a <code>wxGrid</code>, but have no idea how to do this.  </p>
  
  <p>I get the Window-Object of the left upper grid corner cell with</p>
  
  <pre><code>mywindow = self.someGrid.GetGridCornerLabelWindow()
  </code></pre>
  
  <p>But now I cannot set a bitmap to these Window-Object. Can anybody help me?</p>