i found answers of my question.
first, i down CHM files about C++ and added to help file.
second, i set combind.chm as defualt and F1.
and to change shortcut key for F1 to CTRL+F1 , i change help key from F1 to CTRL+F1 by shortcut keys
nut my problem is ,couldn't run helpFile by F1 , CTRL+F1 and Locate in .. in context menu.
anybody know my problem where is? i quit from C::B and test twice but no replay.