---
name: "RtlComputeCrc32"
section: "3w"
platform: "linux"
package: "libwine-dev"
version: "1.4.1-4"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/RtlComputeCrc32"
---

# RtlComputeCrc32(3w)

## NAME

**RtlComputeCrc32** (NTDLL.@)

## SYNOPSIS

DWORD RtlComputeCrc32\
  (\
   DWORD       *dwInitial*,\
   const BYTE\* *pData*,\
   INT         *iLen*\
  )

## DESCRIPTION

Calculate the **CRC32** checksum of a block of bytes.

## PARAMS

*dwInitial* **\[In\]**  Initial **CRC** value.

*pData* **\[In\]**  Data block.

*iLen* **\[In\]**  Length of the byte block.

## RETURNS

The cumulative **CRC32** of *dwInitial* and *iLen* bytes of the *pData* block.

## IMPLEMENTATION

Declared in **"winternl.h"**.

Implemented in **"dlls/ntdll/rtl.c"**.

Debug channel **"ntdll"**.