beeper.h

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/*
 * BEEPER.H
 * Beeper Automation Object #1 Chapter 14
 *
 * Classes that implement the Beeper object.
 *
 * Copyright (c)1993-1995 Microsoft Corporation, All Right Reserved
 *
 * Kraig Brockschmidt, Microsoft
 * Internet  :  [e-mail]
 * Compuserve:  >INTERNET:[e-mail]
 */


#ifndef _BEEPER_H_
#define _BEEPER_H_

#define INC_AUTOMATION
#define CHAPTER14
#include <inole.h>
#include <malloc.h>

//Help context ID for exceptions
#define HID_SOUND_PROPERTY_LIMITATIONS  0x1E100


//English method, property, and exception strings
#define IDS_0_MIN                   16
#define IDS_0_EXCEPTIONSOURCE       (IDS_0_MIN)
#define IDS_0_EXCEPTIONINVALIDSOUND (IDS_0_MIN+1)
#define IDS_0_SOUND                 (IDS_0_MIN+2)
#define IDS_0_BEEP                  (IDS_0_MIN+3)

#define IDS_0_NAMESMIN              (IDS_0_MIN+2)

//German method, property, and exception strings
#define IDS_7_MIN                   32
#define IDS_7_EXCEPTIONSOURCE       (IDS_7_MIN)
#define IDS_7_EXCEPTIONINVALIDSOUND (IDS_7_MIN+1)
#define IDS_7_SOUND                 (IDS_7_MIN+2)
#define IDS_7_BEEP                  (IDS_7_MIN+3)

#define IDS_7_NAMESMIN              (IDS_7_MIN+2)

//Number of names in GetIDsOfNames
#define CNAMES                      2

//Forward class declarations for friend statements
class CImpIDispatch;
typedef CImpIDispatch *PCImpIDispatch;


class CBeeper : public IUnknown
    {
    friend CImpIDispatch;

    protected:
        ULONG           m_cRef;             //Object reference count
        LPUNKNOWN       m_pUnkOuter;        //Controlling unknown
        PFNDESTROYED    m_pfnDestroy;       //To call on closure

        long            m_lSound;           //Type of sound
        PCImpIDispatch  m_pImpIDispatch;    //Our IDispatch
        LPTSTR          m_pszScratch;       //For GetIDsOfNames

    public:
        CBeeper(LPUNKNOWN, PFNDESTROYED);
        ~CBeeper(void);

        BOOL Init(void);

        //Non-delegating object IUnknown
        STDMETHODIMP         QueryInterface(REFIID, PPVOID);
        STDMETHODIMP_(ULONG) AddRef(void);
        STDMETHODIMP_(ULONG) Release(void);
    };

typedef CBeeper *PCBeeper;


//DISPIDs for our dispinterface
enum
    {
    PROPERTY_SOUND=0,
    METHOD_BEEP
    };


/*
 * IDispatch interface implementations for the Beeper.
 */

class CImpIDispatch : public IDispatch
    {
    public:
        ULONG           m_cRef;

    private:
        PCBeeper        m_pObj;
        LPUNKNOWN       m_pUnkOuter;

    public:
        CImpIDispatch(PCBeeper, LPUNKNOWN);
        ~CImpIDispatch(void);

        //IUnknown members that delegate to m_pUnkOuter.
        STDMETHODIMP         QueryInterface(REFIID, PPVOID);
        STDMETHODIMP_(ULONG) AddRef(void);
        STDMETHODIMP_(ULONG) Release(void);

        //IDispatch members
        STDMETHODIMP GetTypeInfoCount(UINT *);
        STDMETHODIMP GetTypeInfo(UINT, LCID, ITypeInfo **);
        STDMETHODIMP GetIDsOfNames(REFIID, OLECHAR **, UINT, LCID
            , DISPID *);
        STDMETHODIMP Invoke(DISPID, REFIID, LCID, WORD
            , DISPPARAMS *, VARIANT *, EXCEPINFO *, UINT *);
    };



//Exceptions we can throw from IDispatch::Invoke
enum
    {
    EXCEPTION_NONE=0,
    EXCEPTION_INVALIDSOUND=1000
    };


//Exception filling function for the EXCEPINFO structure.
HRESULT STDAPICALLTYPE FillException(EXCEPINFO *);

#endif //_BEEPER_H_