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 | void lockcd(){
	m_hCD = CreateFile ("\\\\.\\E:", GENERIC_READ,
                     FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,
                     OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,NULL);
	PREVENT_MEDIA_REMOVAL pmrLockCDROM;
	pmrLockCDROM.PreventMediaRemoval = TRUE;
	DWORD   dwNotUsed;
	DeviceIoControl (m_hCD, IOCTL_STORAGE_MEDIA_REMOVAL,
		&pmrLockCDROM, sizeof(pmrLockCDROM), NULL,
				   0, &dwNotUsed, NULL);
	return TRUE;
}
void Unlock(){
	if (INVALID_HANDLE_VALUE == m_hCD) return FALSE;
	PREVENT_MEDIA_REMOVAL pmrLockCDROM;
	pmrLockCDROM.PreventMediaRemoval = FALSE;
	DWORD   dwNotUsed;
	DeviceIoControl (m_hCD, IOCTL_STORAGE_MEDIA_REMOVAL,
		  &pmrLockCDROM, sizeof(pmrLockCDROM), NULL,
				   0, &dwNotUsed, NULL);
	CloseHandle (m_hCD);
	return TRUE;
} | 
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