RTF character set to codepage?

[SiliconJaltz]

Hi,

I'm trying to convert some RTF text to Unicode UTF-16.

The characters I'm converting are double byte Japanese.
The character set is fcharset128 which should be codepage 932.
I am looking for a way to ask .NET given a character set for it to return the correct codepage or encoding.

How do I map the character set 128 to the correct codepage?

With other languages RTF gives the codepage, so its a simple matter of retrieving the encoding..e.g. normal codepage for english is 1252, so nSourceCodePage = 1252.

 Encoding srcEncoding = Encoding.GetEncoding(nSourceCodePage);
               InBytes = new byte[2];
               InBytes[0] = nFirstDoubleByte;
               InBytes[1] = (byte)node.Parameter;
//and convert to Unicode
              Encoding unicodeEncoding = Encoding.GetEncoding(1200);
              byte[] outputBytes = UnicodeEncoding.Convert(srcEncoding, unicodeEncoding, InBytes);
             string unicodestring = System.Text.Encoding.Unicode.GetString(outputBytes);

Any help appreciated.
John