VB Function过程求最大公约数和最小公倍数

'Function过程求最大公约数和最小公倍数
Private Function gys(ByVal m%, ByVal n%) As Integer

    Dim r As Integer
    Do '辗转相除法
        r = m Mod n
        If r = 0 Then Exit Do
        m = n
        n = r
    Loop
    gys = n
End Function
Private Sub Command1_Click()
    Dim a%, b%, x%, y%
    a = 16: b = 12
    x = gys(a, b)
    y = (a * b) / x
    Print "最大公约数为：" & x
    Print "最小公倍数为：" & y
End Sub