gtkPreviewGetVisual
Returns the visual used by preview widgets. This
function is deprecated, and you should use
gdkRgbGetVisual instead.
WARNING: gtk_preview_get_visual is deprecated and should not be used in newly-written code.
gtkPreviewGetVisual()
[GdkVisual] the visual for previews.
Derived by RGtkGen from GTK+ documentation
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.