Just commited gtk3 widgetset (alpha status) r41811 ... You can use it by uncommenting USEGTK3ALPHA in lcl/interfaces/gtk3/gtk3defines.inc. Most of gtk3 handles are implemented (not all props), but eg. form,buttons,edits,memo,listbox,combobox,spinedit,panel,groupbox ...lot of things is missing. TODO is in README.txt in gtk3 subdir. zeljko