Пересчитать матрицу К размерности m * n так, чтобы поменялись местами первый и последний столбец - VB

Private Sub Command1_Click()
Dim K() As Single, m As Integer, n As Integer
m = InputBox("m")
n = InputBox("n")
ReDim K(1 To m, 1 To n)
For i = 1 To m
    For j = 1 To n
        K(i, j) = InputBox(" K(" & i & "," & j & ")")
        Print K(i, j);
    Next j
    Print
Next i
Print
For i = 1 To m
    For j = 1 To n
        d = K(i, 1):
        K(i, 1) = K(i, n):
        K(i, n) = d
        Print K(i, j);
       Next j
    Print
Next i
End Sub