Read Unicode(Japanese, Chinese) emails from outlook into VB as a string

I am trying to Read Outlook object and get Message Body as a string.

Dim MailItem as new Outlook.mailItem
Dim temp as String
temp = StrConv(MailItem.Body, vbUnicode)

I always get '?' when it comes to read any Chinese Messages.

I tried to use ChrW$(&H5B8B) as a trial too but even that function returns '?'.

Any help ????