```cmake
# VTK version number components.
set(VTK_MAJOR_VERSION 6)
set(VTK_MINOR_VERSION 3)
set(VTK_BUILD_VERSION 0)
```

Increment version to VTK 7.0.0
user
```cmake
# VTK version number components.
set(VTK_MAJOR_VERSION 7)
set(VTK_MINOR_VERSION 0)
set(VTK_BUILD_VERSION 0)
```
assistant