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| Using GTK+ on WindowsUsing GTK+ on Windows — Windows-specific aspects of using GTK+ | 
The Windows port of GTK+ is an implementation of GDK (and therefore GTK+) on top of the Win32 API.
The Windows GDK backend can be influenced with some additional command line arguments.
--sync. 
Don't batch GDI requests. This is a useful option for 
debugging, but it will slow down the performance considerably.
--no-wintab, 
       --ignore-wintab. 
Don't use the Wintab API for tablet support. This is the default.
--use-wintab. 
Use the Wintab API for tablet support, if GTK+ has been compiled 
with the --with-wintab option.
--max-colors . 
In 256 color mode, restrict the size of the color palette to 
the specified number of colors.
number
The Win32 GDK backend can be influenced with some additional environment variables.
GDK_IGNORE_WINTAB. 
If this variable is set, GTK+ doesn't use 
the Wintab API for tablet support. This is the default.
GDK_USE_WINTAB. 
If this variable is set, GTK+ uses the Wintab API for 
tablet support, if GTK+ has been compiled with the 
--with-wintab option.
GDK_WIN32_MAX_COLORS. 
Specifies the size of the color palette used
in 256 color mode.
G_WIN32_PRETEND_WIN9X. 
Only use the Windows 9x API.
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