beep.cpp

武安河书第一版（vxd）Windows 驱动例子

// BEEP.cpp - main module for VxD BEEP

#define DEVICE_MAIN
#include "beep.h"
Declare_Virtual_Device(BEEP)
#undef DEVICE_MAIN

int x;

BOOL BeepDevice::OnSysDynamicDeviceInit()
{
	x=_inp(0x61);
	_outp(0x61,x|3);
	BeepTimeOut* pBeeper = new BeepTimeOut(500); 
	pBeeper->Set();
	return TRUE;
}

BOOL BeepDevice::OnSysDynamicDeviceExit()
{
	return TRUE;
}

VOID BeepTimeOut:: handler(VMHANDLE hVM, THREADHANDLE th, PCLIENT_STRUCT pRegs,
		DWORD lag)
{
	_outp(0x61,x);
}