Dr. Dobb's Journal January 1997
class CPage : public CPropertyPage {
// ...
virtual void OnHelp();
DECLARE_MESSAGE_MAP()
};
BEGIN_MESSAGE_MAP(CPage, CPropertyPage)
ON_COMMAND(ID_HELP, OnHelp)
// ...
END_MESSAGE_MAP()
void CPage::OnHelp()
{
theApp.WinHelp(CPage::IDD + 0x20000, HELP_CONTEXT);
}