Reverse the String without using StrReverse

Dim i
Dim iStrLen
Dim strOut
Dim strTmp
Dim strMyString
strString=("Please enter the string to be reversed:")
iStrLen = Len(strString)
For i = 0 To Len(strString) - 1
         strOut = Mid(strString, iStrLen - i, 1)
         strTmp = strTmp & strOut
Next
strMyString = strTmp
msgbox strMyString