Thanks for this help dantay9 & DaleHohm .that is why i love auto it .....
now complete code is
#include <IE.au3>
$oIE = _IECreate("http://widelec.org/zdjecie,siedziba-blizzarda,3211.html")
$oH1 = _IETagnameGetCollection($oIE, "h1", 1)
$a =_IEPropertyGet($oH1, "innertext")
MsgBox(4096, "Test", $a, 10)
#include <INet.au3>
#Include <string.au3>
$Source = _INetGetSource("http://widelec.org/zdjecie,siedziba-blizzarda,3211.html")
$Between = _StringBetween($Source, '<h1 class="detail">', '</h1>')
MsgBox(0, "Result", $Between[0])