> For the complete documentation index, see [llms.txt](https://docs.9proxy.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.9proxy.com/developers/sdk/sdk-native-c/functions/setenableproxyauth.md).

# SetEnableProxyAuth

Enable or disable proxy authentication.

```c
int SetEnableProxyAuth(int enable)
```

***

## Parameters

* **enable**: 1 to enable authentication, 0 to disable.

## Return Value

* int: 0 if success.

## Example

```c
// example

SetEnableProxyAuth(1);

```