--- Win32API.new(dllname, proc, import, export)
    DLL dllname ɤAPIؿ proc Υ֥Ȥ
    ޤimport ˤ proc ΰηΥꥹȤ
    export ˤ proc ͤηꤷޤ

    λϰʲʸޤǤ

    * "p" ݥ
    * "n", "l" long 
    * "i" int
    * "v" void

    import  nil ξϰʤȸʤޤޤ
    export  nil ξͤʤ(void)ȸʤ
    ޤ

