The visual development kit (vdk) is a c++ library that wraps the gtk+ toolkit.

the package also includes the vdk component library which contains some useful new components not available in pure gtk+.

programming in vdk is much like programming in vcl and borland c++ builder.

this package contains the debugging static libraries for the vdk c++ library.

the debugging libraries are installed as /usr/lib/libvdk_g.a link specifically with them if you want to debug.