IOCTL_DISK_GET_PARTITION_INFO

The IOCTL_DISK_GET_PARTITION_INFO DeviceIoControl operation returns information about the type, size, and nature of a disk partition.

dwIoControlCode = IOCTL_DISK_GET_PARTITION_INFO ; // operation code

lpInBuffer = NULL; // address of input buffer; not used; must be NULL

nInBufferSize = 0; // size of input buffer; not used; must be zero

lpOutBuffer; // address of output buffer

nOutBufferSize; // size of output buffer

lpBytesReturned; // address of actual bytes of output

Parameters

lpInBuffer

Points to an input buffer. Not used with this operation. Set to NULL.

nInBufferSize

Specifies the size, in bytes, of the buffer pointed to by lpInBuffer. Not used with this operation. Set to zero.

lpOutBuffer

Points to a buffer that will receive a PARTITION_INFORMATION data structure.

nOutBufferSize

Specifies the size, in bytes, of the buffer pointed to by lpOutBuffer, which must be large enough to contain a PARTITION_INFORMATION data structure.

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

This device I/O control operation is for disk devices. Floppy disk drivers, however, do not need to handle this operation.

See Also

DeviceIoControl, IOCTL_DISK_SET_PARTITION_INFO, PARTITION_INFORMATION

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