VB6.0自定义函数求助

Question

Function SSWR(x As String, n As Integer) As Double
If Mid(x, InStr(x, ".") + n, 1) >= 5 Then
x = Left(x, InStr(x, ".") + n - 1) + (1 / (1 * 10 ^ (n - 1)))
Else
x = Left(x, InStr(x, ".") + n - 1)
End If
End Function
写的个自定义函数对小数进行四舍五入，不知道对不对，x代表小数，n表示保留位数
但是在调用时弹出来的怎么是0，不知道怎么回事，求高手解答？？

Answer 1

Private Sub Form_Load()
MsgBox SSWR("1.123456", 6)
End Sub

Function SSWR(x As String, n As Integer) As Double
If Mid(x, InStr(x, ".") + n, 1) >= 5 Then
x = Left(x, InStr(x, ".") + n - 1) + (1 / (1 * 10 ^ (n - 1)))
Else
x = Left(x, InStr(x, ".") + n)
End If
SSWR = x
End Function

Answer 2

函数没返回值追问

该怎么改呢

追答

在End Function前加入：
SSWR=val(x)