Just finished converting TDfsSplitter, a netscape look alike splitter, to lazarus. I have tested with Win32, GTK2 and QT Widget sets under win 7 32 bits and it seems to work as expected. The only problem I'm seeing is that on QT it does not have the same color as in the other widget sets. I'm attaching a zip with the original component and my modified pas file. You don't need anything other the uevsXXXXXX.pas unit to use it.
If any one finds any problems leave a post in this thread.