typedef struct _UNICODE_STRING { USHORT Length; USHORT MaximumLength; PWSTR Buffer; } UNICODE_STRING *PUNICODE_STRING;
The UNICODE_STRING structure is used to define UNICODE strings.
The STRING structure is used to pass UNICODE strings.
If the string is NULL terminated, Length does not include the trailing NULL.
The MaximumLength is used to indicate the length of Buffer so that if the string is passed to a conversion routine such as RtlUnicodeStringToAnsiString the returned string does not exceed the buffer size.
OEM_STRING, ANSI_STRING, RtlAnsiStringToUnicodeSize , RtlAnsiStringToUnicodeString, RtlFreeAnsiString, RtlInitAnsiString, RtlUnicodeStringToAnsiString