CWinApp::SetHelpMode
Visual Studio 2012
Sets the application's help type.
void SetHelpMode( AFX_HELP_TYPE eHelpType );
Sets the application's Help type.
To set your application's Help type to HTMLHelp, you can call EnableHTMLHelp. Once you call EnableHTMLHelp, your application must use HTMLHelp as its help application. If you want to change to use WinHelp, you can call SetHelpMode and set eHelpType to afxWinHelp.