Button position representing in C++/VC++ function call:

nPos[(Current Button no)].nX_0 <---  X₀

nPos[(Current Button no)].nX_1 <---  X₁

nPos[(Current Button no)].nY_0  <---  Y₀

nPos[(Current Button no)].nY_1 <---  Y₁

Button position representing in XML:

<Pos>Left=(X₀ value),Right=(X₁ value),Top=(Y₀ value),Bottom=(Y₁ value)</Pos>