title: Read and value from registry and concatenate and finally assign to a variable in wix bootstrapper
body: <p>I want to launch the application immediately after the installation.
  My code is as follows</p>
  
  <pre><code>   &lt;Variable Name="LaunchTarget" Value="C:\ProgramFiles\MySetup\MyExe.exe" /&gt;
  </code></pre>
  
  <p>If the user change the installation directory during installation then this code won't work.</p>
  
  <p>My idea is to keep the directory in a registry key during installation (like <code>C:\ProgramFile\UserGiverName</code>) and in the bootstrapper program want to read this value and add the exe name with this registry key value then assign that value to the <code>LaunchTarget</code> variable..</p>
  
  <p>Welcome to any good suggestion regarding this</p>