windows-server-2003/shell/ext/mlang/detcbase.h

class CINetCodeDetector
{
public:
    CINetCodeDetector() {}
    virtual ~CINetCodeDetector() {}
    int DetectStringA(LPCSTR lpSrcStr, int cchSrc);

protected:
    virtual BOOL DetectChar(UCHAR tc) = 0;
    virtual BOOL CleanUp() = 0;
    virtual int GetDetectedCodeSet() = 0;
};