INVHELP.H

HRESULT CreateObject(LPOLESTR pszProgID, IDispatch FAR* FAR* ppdisp); 
HRESULT  
Invoke(LPDISPATCH pdisp,  
    WORD wFlags, 
    LPVARIANT pvRet, 
    EXCEPINFO FAR* pexcepinfo, 
    UINT FAR* pnArgErr,  
    LPOLESTR pszName, 
    LPCTSTR pszFmt,  
    ...);