title: Disabling "Next" button In InstallScript
body: <p>Using InstallShield - InstallScript project:</p>
  
  <p>I made a custom dialog for browsing for a file.</p>
  
  <p>On the dialog initialization I want to disable the "Next" button.</p>
  
  <p>I am successful in disabling other buttons on this dialog except for any of the buttons of the install wizard: Cancel, Next and Back.</p>
  
  <p>I used the functions _WinSubEnableControl or EnableWindow.</p>