libxfcegui4-4 | Basic GUI C functions for Xfce4 | Mehr ...
This package contains a library which provides the very basic GUI functions used by the Xfce4 desktop suite. If you intend to run Xfce4, then you need to install this package.
libxfcegui4-dev | Development files for libxfcegui4-4 | Mehr ...
This package contains the headers and the static library for libxfcegui4-4. If you intend to code applications which use some of these functions (probably Xfce4-based applications), then you have to install this package. . The libxfcegui4 Reference Manual is also included and it can be consulted with Devhelp or a web browser.
