Vensim DSS ships with a template Venapp that is a very good starting point for developing your own Venapp. Only a small amount of this template is actually model specific. The files to support this Venapp are contained in the venapp\template subdirectory of the sample models directory. This is normally c:\Documents and Settings\All Users\Vensim\models\sample\venapp\template (Windows XP), c:\Users\Public\Vensim\models\sample\venapp\template (Windows Vista/7) or /Users/Shared/Vensim/models/sample/venapp/template (Macintosh).
