[uCommand] HELP_CONTEXTMENU [Action] Displays the Help menu for the selected window, then displays the topic for the selected control in a pop-up window. [dwData] 
Address of an array of DWORD pairs. The first DWORD in each pair is the control identifier, and the second is the context identifier for the topic. The array must be terminated by a pair of zeros {0,0}. If you do not want to add help to a particular control, set its context identifier to -1.