INTEGER TN, dNx, dNy, TBX, TBY, TNX, TNY, II, iBase
TN = W2_myTileList(bi)
dNx = exch2_mydnx(TN)
dNy = exch2_mydny(TN)
TBX = exch2_tbasex(TN)
TBY = exch2_tbasey(TN)
TNX = exch2_tnx(TN)
TNY = exch2_tny(TN)