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

# \_strupr(3w)

## NAME

**\_strupr** (NTDLL.@)

## SYNOPSIS

LPSTR \_strupr\
  (\
   LPSTR *str*\
  )

## DESCRIPTION

Convert a string to upper case.

## PARAMS

*str* **\[In/Out\]**  String to convert.

## RETURNS

*str*. There is no error return, if *str* is **NULL** or invalid, this function will crash.

## IMPLEMENTATION

Declared in **"tchar.h"**.

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