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Help file usage
Step-1: From SDK Help browse to Developer Library » Tools and Utilities » Context-sensitive help guide
step-2:Using this guide create your application related .hlp and .hlp.hrh file
step-3: place this .hlp file c:\system\help folder.
step-3: In your appUi class declared the function
CArrayFix<TCoeHelpContext>* HelpContextL() const
step-4: In your HandleCommandL() method under help menuitem use this code.
CArrayFix<TCoeHelpContext>* buf = CCoeAppUi::AppHelpContextL();
step-5: code for HelpContextL() method
CArrayFix<TCoeHelpContext>* CMYAPPUI::HelpContextL() const
TUid KUidHelpExampleApp; // this is the uid of your .hlp file.
CArrayFixFlat<TCoeHelpContext>* array =
//KContext1 is the help context,you get this value from your .hlp.hrh
step-5: include it in your .pkg file