> For the complete documentation index, see [llms.txt](https://pinvokeisalive.gitbook.io/pinvoke/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pinvokeisalive.gitbook.io/pinvoke/desktopfunctions/ole32/cocreateguid.md).

# CoCreateGuid

### C# Signature:

```cs
[DllImport("ole32.dll", ExactSpelling=true, PreserveSig=false)]
static extern int CoCreateGuid ( out Guid guid );
```

### Sample Code:

```cs
Guid guid;
CoCreateGuid ( out guid );
string guid_s = guid.ToString();
// or:
Marshal.ThrowExceptionForHR ( CoCreateGuid ( out guid ) , new IntPtr ( -1 ) );
guid_s = guid.ToString();
```

### Alternative Managed API:

```cs
System.Guid.NewGuid()
```