###CMakeLists.txt
```cmake
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

if(POLICY CMP0020)
  cmake_policy(SET CMP0020 NEW)
  cmake_policy(SET CMP0071 NEW)
endif()

PROJECT(XXX)

find_package(VTK COMPONENTS
  ZZZ
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping XXX: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")

if(vtkGUISupportQt_LOADED OR TARGET VTK::GUISupportQt)
  if (VTK_VERSION VERSION_LESS "8.90.0")
    # Instruct CMake to run moc automatically when needed.
    set(CMAKE_AUTOMOC ON)
  else()
     # Instruct CMake to run moc automatically when needed.
    set(CMAKE_AUTOMOC ON)
    set(CMAKE_AUTOUIC ON)
  endif()
  # We have ui files, this will bring in the macro: qt5_wrap_ui
  find_package(Qt5Widgets REQUIRED QUIET)
else()
  message(STATUS "GuiSupportQt not found.")
  return()
endif()

include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})

file(GLOB UI_FILES *.ui)
file(GLOB QT_WRAP *.h)
file(GLOB CXX_FILES *.cxx)

qt5_wrap_ui(UISrcs ${UI_FILES})

if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  # CMAKE_AUTOMOC in ON so the MOC headers will be automatically wrapped.
  add_executable(XXX MACOSX_BUNDLE
    ${CXX_FILES} ${UISrcs} ${QT_WRAP})
  qt5_use_modules(XXX Core Gui)
  target_link_libraries(XXX ${VTK_LIBRARIES})
else()
  # CMAKE_AUTOMOC in ON so the MOC headers will be automatically wrapped.
  add_executable(XXX MACOSX_BUNDLE
    ${CXX_FILES} ${UISrcs} ${QT_WRAP})
  qt5_use_modules(XXX Core Gui)
  target_link_libraries(XXX ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS XXX
    MODULES ${VTK_LIBRARIES}
  )
endif()
```

###Download and Build XXX
Click [here to download XXX](https://github.com/lorensen/VTKWikiExamplesTarballs/raw/master/XXX.tar) and its *CMakeLists.txt* file.
Once the tarball *XXX.tar* has been downloaded and extracted,
```
 cd XXX/build
```
This example requires Qt and VTK.

If VTK and Qt are installed:
```
 cmake ..
```
If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
```
 cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
```
If Qt is not found on your system, you will need to tell CMake where to find qmake:
```
cmake -DQT_QMAKE_EXECUTABLE:FILEPATH=/usr/something/qmake  ..
```

Build the project:
```
make
```
and run it:
```
./XXX
```
!!! note "WINDOWS USERS"
    Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time. You may also need to add a Qt related path.
