在Windows资源浏览器中，可在DVD/CD光驱图标上单击鼠标右键，选择"弹出"来打开光驱仓门，你可能也发现了，菜单中并没有"关闭"命令来关闭光驱。下面，就让我们用程序来控制打开、关闭光驱。
程序的主要工作部分为CD_OpenClose(BOOL bOpen, TCHAR cDrive)函数：
| //cDrive是光驱盘符，或者0x01为默认驱动器。 //例如： //CD_OpenCloseDrive(TRUE, 'G'); //打开光驱G: //CD_OpenCloseDrive(FALSE, 'G'); //关闭光驱G: //CD_OpenCloseDrive(TRUE, 1); //打开第一个逻辑光驱 void CD_OpenCloseDrive(BOOL bOpenDrive, TCHAR cDrive) { MCI_OPEN_ParmS op; MCI_STATUS_ParmS st; DWord flags; TCHAR szDriveName[4]; strcpy(szDriveName, "X:"); ::ZeroMemory(&op, sizeof(MCI_OPEN_ParmS)); op.lpstrDeviceType = (LPCSTR) MCI_DEVTYPE_CD_AUDIO; if(cDrive > 1) { szDriveName[0] = cDrive; op.lpstrElementName = szDriveName; flags = MCI_OPEN_TYPE MCI_OPEN_TYPE_ID MCI_OPEN_ELEMENT MCI_OPEN_SHAREABLE; } else flags = MCI_OPEN_TYPE MCI_OPEN_TYPE_ID MCI_OPEN_SHAREABLE; if (!mciSendCommand(0,MCI_OPEN,flags,(unsigned long)&op)) { st.dwItem = MCI_STATUS_READY; if(bOpenDrive) mciSendCommand(op.wDeviceID,MCI_SET,MCI_SET_DOOR_OPEN,0); else mciSendCommand(op.wDeviceID,MCI_SET,MCI_SET_DOOR_CLOSED,0); mciSendCommand(op.wDeviceID,MCI_CLOSE,MCI_WAIT,0); } } 为了方便对多个光驱进行操作，添加了下面这个函数，其会调用上面的CD_OpenCloseDrive()函数： void CD_OpenCloseAllDrives(BOOL bOpenDrives) { //判定所有光驱，并逐个打开或关闭。 int nPos = 0; UINT nCount = 0; TCHAR szDrive[4]; strcpy(szDrive, "?:\\"); DWORD dwDriveList = ::GetLogicalDrives (); while (dwDriveList) { if (dwDriveList & 1) { szDrive[0] = 0x41 + nPos; if(::GetDriveType(szDrive) == DRIVE_CDROM) CD_OpenCloseDrive(bOpenDrives, szDrive[0]); } dwDriveList >>= 1; nPos++; } } |