StringCompare

#include <Windows.h>

INT StringCompareW(_In_ LPCWSTR String1, _In_ LPCWSTR String2)
{
	for (; *String1 == *String2; String1++, String2++)
	{
		if (*String1 == '\0')
			return 0;
	}

	return ((*(LPCWSTR)String1 < *(LPCWSTR)String2) ? -1 : +1);
}

INT main(VOID)
{
	WCHAR String1[] = L"Cat";
	WCHAR String2[] = L"Cat";
	WCHAR String3[] = L"Dog";
    
	INT Result = 0;

	Result = StringCompareW(String1, String2); //returns 0, strings equal

	Result = StringCompareW(String1, String3); //returns non-zero, strings not equal

  return ERROR_SUCCESS;
}