title: CMake problem: could not find any instance of Visual Studio
body: <p><strong>What I want to do</strong></p>
  
  <p>I got a source SDK file folder which contains all the files needed to create a project (or .sln), including a CMakeLists. And then I tried to use CMake to build a solution file. And this image below is the guide for how to get this SDK started.</p>
  
  <p><a href="https://i.stack.imgur.com/r8yhh.png" rel="noreferrer">SDK instruction guide</a></p>
  
  <p><strong>What I did</strong></p>
  
  <ol>
  <li><p>Open Visual Studio 2019 (The CMake module have been installed).</p></li>
  <li><p>Open the SDK file folder with VS2019.</p></li>
  <li><p>Click "Tools" and open Visual Studio 2019 Developer Command Prompt v16.4.2.</p></li>
  <li><p>Type:</p>
  
  <pre><code>mkdir build
  cd build
  cmake -G"Visual Studio 15 2017 Win64" ..
  </code></pre></li>
  </ol>
  
  <p><strong>Problem</strong></p>
  
  <p>And I met the problem below:</p>
  
  <pre><code>CMake Error at CMakeLists.txt:2 (project):
    Generator 
  
  Visual Studio 15 2017 Win64
  
    could not find any instance of Visual Studio.
  
  -- Configuring incomplete, errors occurred!
  See also "C:/Users/admin/Desktop/StructureSDK-CrossPlatform-0.7.3-ROS/build/CMakeFiles/CMakeOutput.log".
  </code></pre>