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

# RtlUpperString(3w)

## NAME

**RtlUpperString** (NTDLL.@)

## SYNOPSIS

void RtlUpperString\
  (\
   STRING\*       *dst*,\
   const STRING\* *src*\
  )

## DESCRIPTION

Converts an Ascii string to uppercase.

## PARAMS

*dst* **\[Out\]**  Destination for converted string.

*src* **\[In\]**  Source string to convert.

## RETURNS

Nothing.

## NOTES

For the *src* characters from **'a'** **..** **'z'** it assigns **'A'** **..** **'Z'** to *dst*. All other *src* characters are copied unchanged to *dst*. The locale and multibyte characters are not taken into account (as native **DLL**). The number of character copied is the minimum of *src-\>Length* and the *dst-\>MaximumLength*.

## IMPLEMENTATION

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

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

Debug channel **"ntdll"**.