How to convert Unicode characters to ANSI using AutoIt?

[fubar99]

I still have problems with _INetSmtpMail(), but this is because of this code found inside INet.au3:

$s_Send[4] = "From:" & $s_FromName & "<" & $s_FromAddress & ">" & @CRLF & _
            "To:" & "<" & $s_ToAddress & ">" & @CRLF & _
            "Subject:" & $s_Subject & @CRLF & _
            "Mime-Version: 1.0" & @CRLF & _
            "Date: " & _DateDayOfWeek(@WDAY, 1) & ", " & @MDAY & " " & _DateToMonth(@MON, 1) & " " & @YEAR & " " & @HOUR & ":" & @MIN & ":" & @SEC & $bias & @CRLF & _
            "Content-Type: text/plain; charset=US-ASCII" & @CRLF & _
            @CRLF

The solution so far is this:

Local $str = "My name is \u0393\u03A1\u0397"
Local $utfStr = Execute("'" & StringRegExpReplace($str, "(\\u([[:xdigit:]]{4}))","' & ChrW(0x$2) & '") & "'")
Local $ansiStr = _WinAPI_WideCharToMultiByte($utfStr)
MsgBox(64,"Unicode2Ansi", $utfStr & @CRLF & $ansiStr)
Exit

I want to thank all for your time.

If anyone is able to suggest a better email sending UDF, please do!