[delphi-programming] Regarding Context Sensitive Help----Please help me.

[mayurdhale]

Hi,
  I am using
    Application.HelpContext(helpcontext);
  But when helpcontext is not available in helpfile then it gives a 
error.
    Windows Help:
    The Topic does'nt exist.COntact your application vendor for an 
updated helpfile(129).


   Now I need to avoid these message dialog for display in application 
and show another help page which is set in case when helpcontext is not 
available.
  
   Please help.