The Xfce Foundation Classes (XFC) is a set of well integrated C++ classes
for developing Xfce applications on UNIX-like operating systems.

XFC combines the power of GTK+ and the power of C++ into a state-of-the-art
application development framework for the Xfce Desktop Environment.  XFC
judiciously uses C++ language features to avoid layering on too much extra
C++ complexity.  Its API is easy to understand and use, and should feel
immediately familiar to most GTK+ programmers.

WWW: http://xfc.xfce.org/