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I have a button on my application which is needed to enabled/disabled based on cd/dvd tray position. If the tray is opened the button should be disable, else enabled. Somebody please help me on that.
Posted 8-Apr-13 0:50am
WinAppy1.3K

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Solution 1

There is no Windows API function to get the open/close state for the tray of optical drives. You can use DeviceIoCtl() to check if such a drive has a media inserted indicating that the tray is actually closed.
 
To get notifications when the tray is closed or opened with inserted media, add a WM_DEVICECHANGE handler to your application and act upon DBT_DEVICEARRIVAL and DBT_DEVICEREMOVECOMPLETE. See How to receive notification of CD-ROM insertion or removal[^] in the MSDN.
 
If you really need to know the state of the tray when no media is inserted, you must directly ask the drive by calling DeviceIoCtl() with IOCTL_SCSI_PASSTHROUGH providing the required SCSI command descriptor blocks (send a Request Sense Command and check the returned Key Code Qualifier for the Not Ready - Tray open/close errors).
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0 OriginalGriff 8,284
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2 DamithSL 5,614
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