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IOCTL_STORAGE_MEDIA_REMOVAL
The IOCTL_STORAGE_MEDIA_REMOVAL DeviceIoControl operation enables or disables the mechanism that ejects media, for those
devices possessing that locking capability.
dwIoControlCode = IOCTL_STORAGE_MEDIA_REMOVAL; // operation code
lpInBuffer; // address of input buffer
nInBufferSize; // size of input buffer
lpOutBuffer = NULL; // address of output buffer; not used; must be NULL
nOutBufferSize = 0; // size of output buffer; not used; must be zero
lpBytesReturned; // address of actual bytes of output
Parameters
lpInBuffer
Points to a buffer that contains a PREVENT_MEDIA_REMOVAL data structure.
A TRUE value for that structure's PreventMediaRemoval member specifies that media removal is prevented (the device is locked). A
FALSE value specifies that media removal is allowed.
nInBufferSize
Specifies the size, in bytes, of the buffer pointed to by lpInBuffer, which must be large enough to contain a PREVENT_MEDIA_REMOVAL data structure.
lpOutBuffer
Points to an output buffer. Not used with this operation. Set to NULL.
nOutBufferSize
Specifies the size, in bytes, of the buffer pointed to by lpOutBuffer. Not used with this operation. Set to zero.
lpBytesReturned
Points to a DWORD that receives the actual size, in bytes, of the data stored into lpOutBuffer.
Return Values
If the operation succeeds, DeviceIoControl returns TRUE.
If the operation fails, DeviceIoControl returns FALSE. To get extended error information, call GetLastError.
Remarks
The IOCTL_STORAGE_MEDIA_REMOVAL operation is valid only for devices that support removable media.
See Also
DeviceIoControl, IOCTL_STORAGE_EJECT_MEDIA, IOCTL_STORAGE_LOAD_MEDIA, PREVENT_MEDIA_REMOVAL
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