Gets a specified property item (piece of meta data) from an Image object
#include <GDIPlus.au3>
_GDIPlus_ImageGetPropertyItem ( $hImage, $iPropID )
| $hImage | A pointer to an image object. | 
| $iPropID | An identifier of the property item to be retrieved. | 
| Success: | Array containing the values of the property item: [0] - number of values [1] - value 1 [2] - value 2 [n] - value n  | 
| Failure: | Sets the @error flag to non-zero, @extended may contain GPSTATUS error code ($GDIP_ERR* see GPIPlusConstants.au3). | 
_GDIPlus_ImageGetPropertyIdList
Search GdipGetPropertyItem in MSDN Library.
#include <Array.au3>
#include <GDIPlus.au3>
Example()
Func Example()
    _GDIPlus_Startup()
    ; X64 running support
    Local $sWow64 = ""
    If @AutoItX64 Then $sWow64 = "\Wow6432Node"
    Local $hImage = _GDIPlus_ImageLoadFromFile(RegRead("HKLM\SOFTWARE" & $sWow64 & "\AutoIt v3\AutoIt", "InstallDir") & "\Examples\GUI\Torus.png")
    If @error Then
        _GDIPlus_Shutdown()
        MsgBox(16, "", "An error has occured - unable to load image!", 30)
        Return False
    EndIf
    Local $aPropID = _GDIPlus_ImageGetPropertyIdList($hImage)
    _ArrayDisplay($aPropID)
    Local $aValues
    For $i = 1 To $aPropID[0][0]
        $aValues = _GDIPlus_ImageGetPropertyItem($hImage, $aPropID[$i][0])
        _ArrayDisplay($aValues, $aPropID[$i][1])
    Next
    _GDIPlus_ImageDispose($hImage)
    _GDIPlus_Shutdown()
EndFunc   ;==>Example