StringLengthW

#include <Windows.h>

SIZE_T StringLengthW(_In_ LPCWSTR String)
{
	LPCWSTR String2;

	for (String2 = String; *String2; ++String2);

	return (String2 - String);
}

INT main(VOID)
{
	WCHAR String1[] = L"I like cats a lot";
	SIZE_T Length = 0;

	Length = StringLengthW(String1);

  return ERROR_SUCCESS;
}