[vtkusers] Build examples under Win32

[Pat McCormack]

Hi
I just downloaded VTK and used CMake to generate project files for VS6.
However the Examples don't build (I have turned them on in CMakeLists.txt).
everything else builds just fine and the tests run OK.

CMakelists.txt in the Examples subdir looks kinda sparse to me just
IF (VTK_USE_PARALLEL)
   SUBDIRS(ParallelProcessing)
ENDIF (VTK_USE_PARALLEL)
How does CMake infer from this that it ought to recurse into these
subdirectories?
TIA
Pat McCormack