title: How to execute the custom action in silent mode in wix?
body: <p>I am trying to execute the custom action at the time of uninstall the installer in wix.It is working perfectly but it is showing the splash screen of cmd prompt at the time of custom action.Latter I tried with CAQuietExec but it is unable to uininstall the installer and giving error.
  (CAQuietExec: Error 0x80070057: failed to get command line data).</p>
  
  <p>The command that I am using is :</p>
  
  <pre><code>&lt;Fragment&gt;
  &lt;Property Id="ModifyOutlookRegInitSign_14" Value="&amp;quot;[SystemFolder]reg.exe&amp;quot; ADD &amp;quot;HKCU\SOFTWARE\Microsoft\Office\14.0\Outlook\Security&amp;quot; /v InitSign /t REG_DWORD /d 0 /f"/&gt;
      &lt;CustomAction Id="ModifyOutlookRegInitSign_14" BinaryKey="WixCA" DllEntry="CAQuietExec"
                  Execute="deferred" Return="check" /&gt;
      &lt;InstallExecuteSequence&gt;
        &lt;Custom Action="ModifyOutlookRegInitSign_14" Before="InstallFinalize"&gt;&lt;/Custom&gt;
      &lt;/InstallExecuteSequence&gt;
  
    &lt;/Fragment&gt;
  </code></pre>