Create a very long file name with ANSI API

createfile.c

#include <windows.h>

main(int argc, char *argv[])
{
	char *filename = "あいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえおあいうえお.txt";
	HANDLE h;

	h = CreateFileA(filename, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, NULL);
	printf("handle:%p, length:%d\n", h, strlen(filename));
	CloseHandle(h);
}

The length of filename is:

• 404 bytes in CP932
• 204 characters in UTF-16LE
• (604 bytes in UTF-8)

It is obvious that the length is longer then MAX_PATH (=260) bytes, but CreateFileA does create the file.
Why CreateFileA can handle a filename which is longer than MAX_PATH bytes?