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How to get image size?

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does someone know how to get size of an jpg image?

I only found a Dll function for bmp images, but cant get it to work.

Thats my try for bmp:

Global $x
Global $y
$info = _ImageGetInfo ("C:\Dokumente und Einstellungen\Administrator\Eigene Dateien\test\test.bmp")
MsgBox(0,"test", $info)

Func _ImageGetInfo ($path)
    $dll = DllOpen("comctl32.dll")
    $handle = DllCall($dll, "int", "ImageList_LoadImage", "none", "", "string", $path, "int", 0, "int", 1, "int", "CLR_NONE", "int", "IMAGE_BITMAP", "int", "LR_LOADFROMFILE")
    $dllstrx = DllStructCreate("int")
    $dllstry = DllStructCreate("int")
    $size = DllCall($dll, "int", "ImageList_GetIconSize", "int", $handle, "ptr", DllStructGetPtr($dllstrx), "ptr",  DllStructGetPtr($dllstry))
    $result = DllStructGetData($dllstrx, 1)
    Return $result

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