# FoldStringW

```csharp
[DllImport("Kernel32.dll")][return: MarshalAs(UnmanagedType.U4)]
public static extern uint FoldStringW(
   uint dwMapFlags,
   string lpSrcStr,
   int cchSrc,
   StringBuilder lpDestStr,
   int cchDest
);
```

Microsoft documentation: [Link](https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-foldstringw)