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IOCTL_STORAGE_EJECTION_CONTROL IOCTL (winioctl.h)

Enables or disables the mechanism that ejects media. Disabling the mechanism locks the drive.

To perform this operation, call the DeviceIoControl function with the following parameters.

BOOL DeviceIoControl(
 (HANDLE) hDevice, // handle to device
 IOCTL_STORAGE_EJECTION_CONTROL, // dwIoControlCode
 (LPVOID) lpInBuffer, // input buffer
 (DWORD) nInBufferSize, // size of input buffer
 NULL, // lpOutBuffer
 0, // nOutBufferSize
 (LPDWORD) lpBytesReturned, // number of bytes returned
 (LPOVERLAPPED) lpOverlapped // OVERLAPPED structure
);

Remarks

The driver tracks IOCTL_STORAGE_EJECTION_CONTROL requests by caller. It ignores requests to enable the ejection mechanism unless it has received a request to disable the ejection mechanism from the same caller. This prevents other callers from unlocking the drive.

Requirements

Requirement Value
Minimum supported client Windows XP
Minimum supported server Windows Server 2003
Header winioctl.h (include Windows.h)

See also

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