dimension definition

[lower To] upper

Array dimension. If lower is omitted then the lower bound is zero or one depending on the Option Base setting. (The lower bound of an array element in a Type definition is not affected by the Option Base setting.) upper must be at least as big as lower. 

Dim A(100 To 200) '101 values
NOTE: For ReDim the lower and upper may be any valid expression. Otherwise, lower and upper must be constant expressions.