Using GTK+ on Windows: GTK+ 2 Reference Manual

Using GTK+ on Windows

Using 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 might be a marginally useful option for debugging.

--no-wintab, --ignore-wintab. Don't use the Wintab API for tablet support.

--use-wintab. Use the Wintab API for tablet support. This is the default.

--max-colors number. In 256 color mode, restrict the size of the color palette to the specified number of colors. This option is obsolete.

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.

GDK_USE_WINTAB. If this variable is set, GTK+ uses the Wintab API for tablet support. This is the default.

GDK_WIN32_MAX_COLORS. Specifies the size of the color palette used in 256 color mode.