ReDim (BASIC command) Purpose Changes the number of elements in an array. Using this command on an existing array will replace the old array dimension with the new one. Syntax ReDim VarName As VarType ReDim Preserve VarName As VarType ReDim VarName (ArrayUpperBound) As VarType ReDim VarName (ArrayLowerBound To ArrayUpperBound) As VarType ReDim VarName1 As VarType, Varname2 As VarType... Preserve Keeps existing values in an array. If you don't include this keyword, the array is erased as if Erase had been used on it. For an explanation of the rest of this syntax, see Dim. Example ReDim Preserve MyArray (MAXVAL+1) As Integer