BEEPER.H

/* 
 * 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  :  kraigb@microsoft.com 
 * Compuserve:  >INTERNET:kraigb@microsoft.com 
 */ 
 
 
#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_