#include <GDIPlus.au3>
#include <GUIConstantsEx.au3>

Example()

Func Example()
        Local $iW, $iH, $hGUI, $hGraphic, $hBrush, $hPen, $hPath, $hPath_Clone, $hMatrix

        ; Create GUI
        $iW = 600
        $iH = 600
        $hGUI = GUICreate("GDI+", $iW, $iH)
        GUISetState(@SW_SHOW)

        _GDIPlus_Startup()
        $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hGUI) ;Create a graphics object from a window handle
        _GDIPlus_GraphicsSetSmoothingMode($hGraphic, $GDIP_SMOOTHINGMODE_HIGHQUALITY) ;Sets the graphics object rendering quality (antialiasing)
        _GDIPlus_GraphicsClear($hGraphic, 0xFFFFFFFF)

        $hBrush = _GDIPlus_BrushCreateSolid(0x7F8800AA)
        $hPen = _GDIPlus_PenCreate(0xFF8800AA, 2)

        $hPath = _GDIPlus_PathCreate() ;Create new path object

        ;spiral as a sequence of lines
        Local $iXOld = 0, $iYOld = 0, $iX, $iY, $iAngle = 0, $iRadius = 0
        For $i = 0 To 200
                $iX = Cos($iAngle) * $iRadius
                $iY = Sin($iAngle) * $iRadius
                $iAngle += 0.1
                $iRadius = $iAngle ^ 2 / 2
                _GDIPlus_PathAddLine($hPath, $iXOld, $iYOld, $iX, $iY)
                $iXOld = $iX
                $iYOld = $iY
        Next

        $hPath_Clone = _GDIPlus_PathClone($hPath)
        _GDIPlus_PathReverse($hPath_Clone) ;reverse path => end point of path = start point of cloned path

        $hMatrix = _GDIPlus_MatrixCreate()
        _GDIPlus_MatrixScale($hMatrix, 1.5, 1.5)
        _GDIPlus_PathTransform($hPath_Clone, $hMatrix) ;zoom cloned path

        _GDIPlus_PathAddPath($hPath, $hPath_Clone) ;add scaled/reversed path to original path

        _GDIPlus_MatrixSetElements($hMatrix, 1, 0, 0, 1, 0, 0) ;reset matrix
        _GDIPlus_MatrixTranslate($hMatrix, $iW / 2, $iH / 2, True)
        _GDIPlus_PathTransform($hPath, $hMatrix) ;move path to center of window

        _GDIPlus_GraphicsFillPath($hGraphic, $hPath, $hBrush) ;Fill path to graphics handle (GUI)
        _GDIPlus_GraphicsDrawPath($hGraphic, $hPath, $hPen) ;Draw path to graphics handle (GUI)

        ; Loop until the user exits.
        Do
        Until GUIGetMsg() = $GUI_EVENT_CLOSE

        ; Clean up resources
        _GDIPlus_MatrixDispose($hMatrix)
        _GDIPlus_PathDispose($hPath)
        _GDIPlus_PathDispose($hPath_Clone)
        _GDIPlus_BrushDispose($hBrush)
        _GDIPlus_PenDispose($hPen)
        _GDIPlus_GraphicsDispose($hGraphic)
        _GDIPlus_Shutdown()
EndFunc   ;==>Example