pBuf (PVOID) - input

The address of the buffer where the returned information is placed.

The output data for each function is shown in the following list (all lengths are in bytes):

┌──────────┬──────────┬────────────────────────────────────────┐
│Function  │DataLen   │Returned Information                    │
├──────────┼──────────┼────────────────────────────────────────┤
│ 1        │ 2        │Total number of partitionable disks in  │
│          │          │the system (1-based).                   │
├──────────┼──────────┼────────────────────────────────────────┤
│ 2        │ 2        │Handle for the specified partitionable  │
│          │          │disk for the Category 09h Physical Disk │
│          │          │Control IOCtl Commands.                 │
├──────────┼──────────┼────────────────────────────────────────┤
│ 3        │ 0        │None - pointer must be zero.            │
└──────────┴──────────┴────────────────────────────────────────┘