making pictures in memory.



  
  I've seen you can put an xpm into a pixmap on creation of the pixmap. 
Can you reset the pixmap with a new xpm, without having to free and
re-create the pixmap?
  
  and
  
  What is the concept of GdkImage; can you write to one directly a pixel
at a time without going through gdk_draw_line, etc.?
  
  John  
  

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