#ifndef _NTRTL_H

/**
 * The RtlEqualString routine compares two counted strings to determine whether they are equal.
 *
 * \param String1 A pointer to the first counted string.
 * \param String2 A pointer to the second counted string.
 * \param CaseInSensitive If `TRUE`, case is ignored when comparing the strings.
 * \return `TRUE` if the strings are equal, otherwise `FALSE`.
 * \sa https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/ntddk/nf-ntddk-rtlequalstring
 */
_Must_inspect_result_
NTSYSAPI
BOOLEAN
NTAPI
RtlEqualString(
    _In_ PSTRING String1,
    _In_ PSTRING String2,
    _In_ BOOLEAN CaseInSensitive
    );

#endif
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// ntddk.h

NTSYSAPI BOOLEAN RtlEqualString(
  [in] const STRING *String1,
  [in] const STRING *String2,
  [in] BOOLEAN      CaseInSensitive
);
View the official Windows Driver Kit DDI reference