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Using GTK+ on Windows

Using GTK+ on Windows — Windows-specific aspects of using GTK+

Using GTK+ on Windows

The Windows port of GTK+ is an implementation of GDK (and therefore GTK+) on top of the Win32 API.

Windows-specific commandline options

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 number In 256 color mode, restrict the size of the color palette to the specified number of colors.


Windows-specific environment variables

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.