Background pixmap problem...

[Leo Reiter <ler sansgarbage com>]

I would like to know how I can make a shaped window with a pixmap.  I
have rendered the
pixmap already, and I load it from disk with
gdk_pixmap_create_from_xpm().

Then, I do a gdk_window_set_back_pixmap on the window, and do a
gdk_window_shape_combine_mask() with its mask.  I also tried
gtk_widget_shape_combine_mask(), but have had the same results - a
square box is
rendered using the default background color, with no pixmap and no
shape.  I tried adding
a gtk_widget_set_app_paintable() call, which allows me to render the
pixmap, but it does
not shape the window.

Are there any caveats to doing this?  Should I use a specific color for
the transparent
parts of the pixmap?  (I've tried black, white, and gray, with no luck.)

Any help would be appreciated.

Thanks,

Leo Reiter