Is this still a problem in GTK 2.2.4? gdk_window_set_icon got 
implemented in 2.2.4 (2.2.3 actually).

I'm using V2.2.4 (downloaded from your site on 1st September) and I 
get different results on different versions of windows, but none of 
them are quite right.

I create a pixbuf with gdk_pixbuf_new_from_data() and then pass that 
to gtk_window_set_icon().  It's a 16x16 pixel icon with two colours, 
one is my foreground and should be very light blue (RGB 0xE0E0FF) and 
the other is my background and should be dark blue (RGB 0x0000FF).

On Windows 2000 (SP2), the icon seems to be shown correctly in the 
title bar when my application has focus (although I think that the 
foreground colour is more yellow than light blue) but looks different 
when it doesn't (more of a dark blue foreground on the normal grey 
title bar background colour).  The icon in the task bar is always 
present but the colours are wrong (appears as a dark colour on a 
yellow background, which when should with "Magnifier" with the 
colours inverted looks perfect!).

On Windows XP, the icon in the title bar is present but again with 
the wrong colours (seems to be yellow on green when in focus, but a 
dark red on yellow otherwise, which again when inverted 
with "Magnifier" look perfect).  However, there is never an icon in 
the task bar, just a blank space next to the application title.

So, the original problem still seems to be present under XP at 
least.  Perhaps the colour issue is something I'm doing wrong.

Please attach a minimal but complete sample program...

Created attachment 21034 [details]
Source code for simple test program showing the problem

Created attachment 21035 [details]
Executable built from the above test program (obviously needs DLLs etc.)

The attached program shows the problem I described earlier.  As I 
said, perhaps it's something I'm doing wrong?

Solving this will require some heavy debugging and tracing of what 
happens in gdk-pixbuf and gdk/win32. Won't probably happen soon.

My patch for gdk_window_set_window_list in bug #128762 also appears to
fix this bug.

I believe that the bug is in get_pixmap_and_mask in gtk/gtkwindow.c. 
It uses
gdk_screen_get_system_colormap(gdk_drawable_get_screen(window)) to get
the colormap to pass to
gdk_pixbuf_render_pixmap_and_mask_for_colormap.  I found that using
gdk_drawable_get_colormap(window) worked for me.

The patch for bug #128762 (which was applied) indeed also fixes this 
one, thus resolving as a duplicate.

*** This bug has been marked as a duplicate of 128762 ***