VOID
RtlUpperString(
  IN  PSTRING DestinationString,
  IN  PSTRING SourceString
  );

Routine Description:

    The RtlUpperString function copies the SourceString to the
    DestinationString, converting it to upper case.  The MaximumLength
    and Buffer fields of DestinationString are not modified by this
    function.

    The number of bytes copied from the SourceString is either the
    Length of SourceString or the MaximumLength of DestinationString,
    whichever is smaller.

Arguments:

    DestinationString - Pointer to the destination string.

    SourceString - Pointer to the source string.

Return Value:

    None.