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IOCTL_DISK_GET_PARTITION_INFO info  Overview  Group

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 a nonzero value.

If the operation fails, DeviceIoControl returns zero. 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 

See also:


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