---
description: Initializes a UNICODE_STRING structure without importing from NTDLL
---

# RtlInitUnicodeString

```
VOID RtlInitUnicodeString(_Inout_ PUNICODE_STRING DestinationString, _In_ PCWSTR SourceString)
{
	SIZE_T DestSize;

	if (SourceString)
	{
		DestSize = StringLengthW(SourceString) * sizeof(WCHAR);
		DestinationString->Length = (USHORT)DestSize;
		DestinationString->MaximumLength = (USHORT)DestSize + sizeof(WCHAR);
	}
	else
	{
		DestinationString->Length = 0;
		DestinationString->MaximumLength = 0;
	}

	DestinationString->Buffer = (PWCHAR)SourceString;
}
```

