// dispmprt.h

PVOID DlLockBuffer(
  PVOID             DeviceHandle,
  PVOID             BaseAddress,
  ULONG             Length,
  VP_LOCK_OPERATION Operation
);
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Windows Driver Kit DDI reference (nf-dispmprt-dllockbuffer)

DlLockBuffer function

Description

Probes the specified buffer, makes the buffer's memory pages resident in memory, and locks the physical pages mapped by the virtual address range.

Parameters

`DeviceHandle`

A handle that represents a display adapter.

`BaseAddress`

Specifies the virtual address of the buffer to be locked.

`Length`

Specifies the length in bytes of the buffer to be locked.

`Operation`

Specifies the type of operation for which the caller wants the access rights probed and the pages locked.

Return value

This function returns PVOID.

DlLockBuffer - NtDoc