CLSID与BSTR类型的互相转换

CLSID   m_clsid; 
BSTR   bstrGLSID;   
::StringFromCLSID(m_clsid,&bstrGLSID); 

::CLSIDFromString(bstrGLSID,&m_clsid);

CString strCLSID;

strCLSID=bstrGLSID;

bstrGLSID=strCLSID.AllocSysString();