How to set a charset for BHO

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C++

Windows

I have a BHO for IE. The text is shown properly in Windows XP but not in Windows7.

how can I set a character encoding for BHO? what interface should I investigate for that? :)

thanks in advance!

[Edit After Rejeesh.T.S answer]
I there is no Chinese, Japanese etc... the text is in Russian.
There is a CStatic control in BHO. For that control I create a font:

<br />
m_font.CreateFont(size,0,0,0,weight,FALSE,FALSE,0,RUSSIAN_CHARSET,OUT_DEFAULT_PRECIS,CLIP_DEFAULT_PRECIS,DEFAULT_QUALITY,DEFAULT_PITCH,name);<br />
m_Static.SetFont( &m_font );<br />

I do want to mention, that this works WELL in Windows XP, IE8. The problem with character set presents ONLY in windows7, IE8.
So I think, that changing (somehow) the encoding of BHO will help. But I ddon't know how to do this! :)
[End of edit]