#ifndef _NTRTL_H
// Heap parameters.
typedef
_Function_class_(RTL_HEAP_COMMIT_ROUTINE)
NTSTATUS
NTAPI
RTL_HEAP_COMMIT_ROUTINE(
_In_ PVOID Base,
_Inout_ PVOID* CommitAddress,
_Inout_ PSIZE_T CommitSize
);
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This callback function is documented in Windows Driver Kit.