Adjacent buttons representing in C++/VC++ function call:

nAja[(Current Button no)].nUpper <---  Upper button number

nAja[(Current Button no)].nLower <---  Lower button number

nAja[(Current Button no)].nLeft  <---  Left button number

nAja[(Current Button no)].nRight <---  Right button number

Adjacent buttons representing in XML:

<Adjacent>Top=(top button no),Bottom=(bottom button no),Left=(left button no),Right=(right button no)</Adjacent>