hi, all I am reading 2 CMakeList.txt files coming from the examples (SimpleView, Events) in vtk (Examples/GUI/Qt/). I am using Qt3.3. There is the following command in one of the CMakeList.txt QT_WRAP_UI(qtevents UI_HDRS UI_SRCS GUI.ui) Where can I find the reference for the key words "UI_HDRS" and "UI_SRCS"? Thanks ahead. zl2k