The latest version of the systemtray spec (http://standards.freedesktop.org/systemtray-spec/systemtray-spec-latest.html) documents how to do transparent icons: you have to use the ParentRelative window background.
The latest version of the systemtray spec (http:// standards. freedesktop. org/systemtray- spec/systemtray -spec-latest. html) documents how to do transparent icons: you have to use the ParentRelative window background.