When set to False, the existing .hhp or .hpj files will not be overwritten when building the Help target.

Type	Applies To
Boolean	Help Target (HTML Help) Help Target (WinHelp)

Location

•      Click the Project Icon.

•      Select the Help Targets item from the left pane Tree View.

•      Select the Help target you wish to modify.

•      The property is located under the Build group in the Properties Pane.