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A Wrapper Class for NT Services


August 1998/A Wrapper Class for NT Services/Listing 1

Listing 1: Header file for NTService class

#ifndef _ntservice_h_
#define _ntservice_h_

#include <windows.h>

class NTService
{
private:
    bool                    m_isStarted;
    bool                    m_isPaused;

protected:
    char                    m_name[36];
    DWORD                   m_err;

    LPSERVICE_MAIN_FUNCTION mfpSrvMain;
    LPHANDLER_FUNCTION      mfpSrvControl;

    SERVICE_TABLE_ENTRY     mDispatchTable[2];
    SERVICE_STATUS          mStat;
    SERVICE_STATUS_HANDLE   mh_Stat;

public:
//============================================================
//============================================================
//    static ServiceMain( DWORD ac, LPTSTR *av );
//    static ServiceControl( DWORD opCode );
//============================================================
//============================================================
private:
    NTService();                //== prevent a default constructor
    NTService( NTService& );    //== prevent a copy constructor

protected:

    virtual void SetAcceptedControls( DWORD controls );
    virtual void ChangeStatus( DWORD state, 
                     DWORD checkpoint = (DWORD)0, 
                     DWORD waithint = (DWORD)0 );
    
//== the protected functions below this line should be 
//   overridden as needed

    virtual DWORD Init( DWORD argc, LPTSTR* argv );
    virtual int   Run() = 0;
    
    virtual void  InstallAid( void );
    virtual void  UnInstallAid( void );

//== these are the 6 service control actions
    virtual DWORD OnPause( void );
    virtual DWORD OnContinue( void );

    virtual void  OnStop( void );
    virtual void  OnShutdown( void );

    virtual void  OnInquire( void );
    virtual void  OnUserControl( DWORD usercmd );

public:
//== it should not be necessary to overload these public functions
    NTService( const char *name, LPSERVICE_MAIN_FUNCTION, 
        LPHANDLER_FUNCTION );
    virtual       ~NTService( void );

    virtual DWORD Startup( void );
    virtual int   Service( DWORD argc, LPTSTR* argv );    
    virtual void  Control( DWORD opcode );

    virtual bool  IsInstalled( void );
    virtual bool  Install( void );
    virtual bool  UnInstall( void );

    virtual DWORD GetLastError( void );    
    virtual DWORD GetExitCode( void );    
};

inline DWORD NTService::GetExitCode( void )
{
    return mStat.dwWin32ExitCode;
}
#endif
/* End of File */

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