TN028: Context-sensitive help support

authoritive information on context-sensitive help support for C++ application.

1. TN033: DLL Version of MFC
2. TN028: Context-Sensitive Help Support
3. CWinApp Class
4. Understanding Context-Sensitive Help

CWinApp::HtmlHelp function is the major method to use HTML help:

definition: Call this member function to invoke the HTMLHelp application.

virtual void HtmlHelp( DWORD_PTR dwData, UINT nCmd = 0x000F);

5. HtmlHelpA function

this link lists all items on htmlhelp.h information. can review more times.

6. HH_HELP_CONTEXT command

Displays a help topic based on a mapped topic ID.

If a window type is not specified, a default window type is used. If the window type or default window type is open, the help topic replaces the current topic in the window.