comdef.h

本源码是vc环境下的usb程序

/***
* comdef.h - Native C++ compiler COM support - main definitions header
*
*       Copyright (C) 1996-1999 Microsoft Corporation
*       All rights reserved.
*
****/

#if !defined(_INC_COMDEF)
#define _INC_COMDEF

#if _MSC_VER > 1000
#pragma once
#endif

#ifndef  __cplusplus
#error Native Compiler support only available in C++ compiler
#endif

#include <ole2.h>
#include <olectl.h>

#include <comutil.h>

#if _MSC_VER >= 1200
#pragma warning(push)
#endif
#pragma warning(disable: 4244)
#pragma warning(disable: 4290)

#pragma comment(lib, "comsupp.lib")

#pragma comment(lib, "user32.lib")
#pragma comment(lib, "ole32.lib")
#pragma comment(lib, "oleaut32.lib")

class _com_error;

void __stdcall
        _com_raise_error(HRESULT hr, IErrorInfo* perrinfo = 0) throw(_com_error);

void __stdcall
        _com_issue_error(HRESULT) throw(_com_error);
void __stdcall
        _com_issue_errorex(HRESULT, IUnknown*, REFIID) throw(_com_error);

HRESULT __stdcall
        _com_dispatch_propget(IDispatch*, DISPID, VARTYPE, void*) throw(_com_error);
HRESULT __cdecl
        _com_dispatch_propput(IDispatch*, DISPID, VARTYPE, ...) throw(_com_error);
HRESULT __cdecl
        _com_dispatch_method(IDispatch*, DISPID, WORD, VARTYPE, void*,
                                                 const wchar_t*, ...) throw(_com_error);

HRESULT __stdcall
        _com_dispatch_raw_propget(IDispatch*, DISPID, VARTYPE, void*) throw();
HRESULT __cdecl
        _com_dispatch_raw_propput(IDispatch*, DISPID, VARTYPE, ...) throw();
HRESULT __cdecl
        _com_dispatch_raw_method(IDispatch*, DISPID, WORD, VARTYPE, void*,
                                                         const wchar_t*, ...) throw();

class _com_error {
public:
        // Constructors
        //
        _com_error(HRESULT hr,
               IErrorInfo* perrinfo = NULL,
               bool fAddRef = false) throw();
        _com_error(const _com_error& that) throw();

        // Destructor
        //
        virtual ~_com_error() throw();

        // Assignment operator
        //
        _com_error& operator=(const _com_error& that) throw();

        // Accessors
        //
        HRESULT Error() const throw();
        WORD WCode() const throw();
        IErrorInfo * ErrorInfo() const throw();

        // IErrorInfo method accessors
        //
        _bstr_t Description() const throw(_com_error);
        DWORD HelpContext() const throw();
        _bstr_t HelpFile() const throw(_com_error);
        _bstr_t Source() const throw(_com_error);
        GUID GUID() const throw();

        // FormatMessage accessors
        const TCHAR * ErrorMessage() const throw();

        // EXCEPINFO.wCode <-> HRESULT mappers
        static HRESULT WCodeToHRESULT(WORD wCode) throw();
        static WORD HRESULTToWCode(HRESULT hr) throw();

private:
        enum {
                WCODE_HRESULT_FIRST = MAKE_HRESULT(SEVERITY_ERROR, FACILITY_ITF, 0x200),
                WCODE_HRESULT_LAST = MAKE_HRESULT(SEVERITY_ERROR, FACILITY_ITF+1, 0) - 1
        };
        const HRESULT                   m_hresult;
        IErrorInfo *                    m_perrinfo;
        mutable TCHAR *                 m_pszMsg;
};

inline _com_error::_com_error(HRESULT hr,
                              IErrorInfo* perrinfo,
                              bool fAddRef) throw()
        : m_hresult(hr), m_perrinfo(perrinfo), m_pszMsg(NULL)
{
        if (m_perrinfo != NULL && fAddRef) {
                m_perrinfo->AddRef();
        }
}

inline _com_error::_com_error(const _com_error& that) throw()
        : m_hresult(that.m_hresult), m_perrinfo(that.m_perrinfo), m_pszMsg(NULL)
{
        if (m_perrinfo != NULL) {
                m_perrinfo->AddRef();
        }
}

inline _com_error::~_com_error() throw()
{
        if (m_perrinfo != NULL) {
                m_perrinfo->Release();
        }
        if (m_pszMsg != NULL) {
                LocalFree((HLOCAL)m_pszMsg);
        }
}

inline _com_error& _com_error::operator=(const _com_error& that) throw()
{
        if (this != &that) {
                this->_com_error::~_com_error();
                this->_com_error::_com_error(that);
        }
        return *this;
}

inline HRESULT _com_error::Error() const throw()
{
        return m_hresult;
}

inline WORD _com_error::WCode() const throw()
{
        return HRESULTToWCode(m_hresult);
}

inline IErrorInfo * _com_error::ErrorInfo() const throw()
{
        if (m_perrinfo != NULL) {
                m_perrinfo->AddRef();
        }
        return m_perrinfo;
}

inline _bstr_t _com_error::Description() const throw(_com_error)
{
        BSTR bstr = NULL;
        if (m_perrinfo != NULL) {
                m_perrinfo->GetDescription(&bstr);
        }
        return _bstr_t(bstr, false);
}

inline DWORD _com_error::HelpContext() const throw()
{
        DWORD dwHelpContext = 0;
        if (m_perrinfo != NULL) {
                m_perrinfo->GetHelpContext(&dwHelpContext);
        }
        return dwHelpContext;
}

inline _bstr_t _com_error::HelpFile() const throw(_com_error)
{
        BSTR bstr = NULL;
        if (m_perrinfo != NULL) {
                m_perrinfo->GetHelpFile(&bstr);
        }
        return _bstr_t(bstr, false);
}

inline _bstr_t _com_error::Source() const throw(_com_error)
{
        BSTR bstr = NULL;
        if (m_perrinfo != NULL) {
                m_perrinfo->GetSource(&bstr);
        }
        return _bstr_t(bstr, false);
}

inline _GUID _com_error::GUID() const throw()
{
        _GUID guid;
        memcpy(&guid, &__uuidof(NULL), sizeof(_GUID));
        if (m_perrinfo != NULL) {
                m_perrinfo->GetGUID(&guid);
        }
        return guid;