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

# SwapPlong(3w)

## NAME

**SwapPlong** (MAPI32.47)

## SYNOPSIS

VOID SwapPlong\
  (\
   PULONG *lpData*,\
   ULONG  *ulLen*\
  )

## DESCRIPTION

Swap the bytes in a **ULONG** array.

## PARAMS

*lpData* **\[Out\]**  Array to swap bytes in.

*ulLen* **\[In\]**  Number of **ULONG** element to swap the bytes of.

## RETURNS

Nothing.

## IMPLEMENTATION

Not declared in a Wine header. The function is either undocumented, or missing from Wine.

Implemented in **"dlls/mapi32/util.c"**.

Debug channel **"mapi"**.