kind=defined
names=helpstring
visibility=public

--- helpstring

Returns help string of OLE method. If the help string is not
found, then the method returns nil.

   tobj = WIN32OLE_TYPE.new('Microsoft Internet Controls', 'IWebBrowser')
   method = WIN32OLE_METHOD.new(tobj, 'Navigate')
   puts method.helpstring # => Navigates to a URL or file.

