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

Example()

Func Example()
        ; Create GUI
        Local $hGUI = GUICreate("GDI+", 800, 340)
        GUISetState(@SW_SHOW)

        _GDIPlus_Startup()
        Local $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hGUI)
        _GDIPlus_GraphicsClear($hGraphic, 0xFFFFFFFF)

        Local $hPen = _GDIPlus_PenCreate(0xFF0000FF)
        Local $hBrush = _GDIPlus_BrushCreateSolid(0xFFFF0000)

        Local $hFormat = _GDIPlus_StringFormatCreate()
        Local $hFamily = _GDIPlus_FontFamilyCreate("Arial")
        Local $hFont = _GDIPlus_FontCreate($hFamily, 96, 0)

        Local $sString = ChrW(0x1EF2) & ChrW(0x1EF3)

        Local $iPosX = 50
        Local $iPosY = 50
        Local $aStrDim = _MeasureString($hGraphic, $sString, $hFont, $hFormat, $hFamily)

        _GDIPlus_GraphicsDrawString($hGraphic, "MeasureString", $iPosX, $iPosY - 30)
        _GDIPlus_GraphicsDrawLine($hGraphic, $iPosX, $iPosY - 5, $iPosX, $iPosY + 5, $hPen)
        _GDIPlus_GraphicsDrawLine($hGraphic, $iPosX - 5, $iPosY, $iPosX + 5, $iPosY, $hPen)
        Local $tLayout = _GDIPlus_RectFCreate($iPosX, $iPosY, $aStrDim[4], $aStrDim[5])
        _GDIPlus_GraphicsDrawRect($hGraphic, $iPosX, $iPosY, $aStrDim[4], $aStrDim[5], $hPen)
        _GDIPlus_GraphicsDrawStringEx($hGraphic, $sString, $hFont, $tLayout, $hFormat, $hBrush)

        $iPosX = 300
        _GDIPlus_GraphicsDrawString($hGraphic, "MeasureCharacterRanges", $iPosX, $iPosY - 30)
        _GDIPlus_GraphicsDrawLine($hGraphic, $iPosX, $iPosY - 5, $iPosX, $iPosY + 5, $hPen)
        _GDIPlus_GraphicsDrawLine($hGraphic, $iPosX - 5, $iPosY, $iPosX + 5, $iPosY, $hPen)
        _GDIPlus_GraphicsDrawRect($hGraphic, $iPosX + $aStrDim[0], $iPosY + $aStrDim[1], $aStrDim[2], $aStrDim[3], $hPen)
        DllStructSetData($tLayout, "X", $iPosX)
        _GDIPlus_GraphicsDrawStringEx($hGraphic, $sString, $hFont, $tLayout, $hFormat, $hBrush)

        $iPosX = 550
        _GDIPlus_GraphicsDrawString($hGraphic, "CellAscent / CellDescent", $iPosX, $iPosY - 30)
        _GDIPlus_GraphicsDrawLine($hGraphic, $iPosX, $iPosY - 5, $iPosX, $iPosY + 5, $hPen)
        _GDIPlus_GraphicsDrawLine($hGraphic, $iPosX - 5, $iPosY, $iPosX + 5, $iPosY, $hPen)
        _GDIPlus_GraphicsDrawRect($hGraphic, $iPosX + $aStrDim[0], $iPosY + $aStrDim[1], $aStrDim[2], $aStrDim[7], $hPen)
        _GDIPlus_GraphicsDrawRect($hGraphic, $iPosX + $aStrDim[0], $iPosY + $aStrDim[1] + $aStrDim[7], $aStrDim[2], $aStrDim[8], $hPen)
        DllStructSetData($tLayout, "X", $iPosX)
        _GDIPlus_GraphicsDrawStringEx($hGraphic, $sString, $hFont, $tLayout, $hFormat, $hBrush)

        $sString = "fontsize goes crazy"
        $iPosX = 50
        $iPosY = 300

        Local $sChar
        For $i = 0 To StringLen($sString)

                $sChar = StringLeft($sString, 1)
                $sString = StringTrimLeft($sString, 1)

                If $sChar = " " Then
                        $aStrDim = _MeasureString($hGraphic, "_", $hFont, $hFormat, $hFamily)
                        $iPosX += $aStrDim[2]
                        ContinueLoop
                EndIf

                _GDIPlus_FontDispose($hFont)
                $hFont = _GDIPlus_FontCreate($hFamily, Random(12, 48), 0)
                $aStrDim = _MeasureString($hGraphic, $sChar, $hFont, $hFormat, $hFamily)

                $tLayout = _GDIPlus_RectFCreate($iPosX - $aStrDim[0], $iPosY - $aStrDim[1] - $aStrDim[7], $aStrDim[4], $aStrDim[5])
                _GDIPlus_GraphicsDrawStringEx($hGraphic, $sChar, $hFont, $tLayout, $hFormat, $hBrush)

                $iPosX += $aStrDim[2]
        Next

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

        ; Clean up resources
        _GDIPlus_FontDispose($hFont)
        _GDIPlus_FontFamilyDispose($hFamily)
        _GDIPlus_StringFormatDispose($hFormat)
        _GDIPlus_BrushDispose($hBrush)
        _GDIPlus_PenDispose($hPen)
        _GDIPlus_GraphicsDispose($hGraphic)
        _GDIPlus_Shutdown()
EndFunc   ;==>Example

Func _MeasureString($hGraphics, $sString, $hFont, $hFormat, $hFamily, $iStyle = 0)
        Local $tLayout = _GDIPlus_RectFCreate()
        Local $aInfo = _GDIPlus_GraphicsMeasureString($hGraphics, $sString, $hFont, $tLayout, $hFormat)

        Local $aRanges[2][2] = [[1]]
        $aRanges[1][1] = StringLen($sString)
        _GDIPlus_StringFormatSetMeasurableCharacterRanges($hFormat, $aRanges)
        Local $aRegion = _GDIPlus_GraphicsMeasureCharacterRanges($hGraphics, $sString, $hFont, $aInfo[0], $hFormat)
        Local $aBounds = _GDIPlus_RegionGetBounds($aRegion[1], $hGraphics)
        _GDIPlus_RegionDispose($aRegion[1])

        Local $iFontHeight = _GDIPlus_FontGetHeight($hFont, $hGraphics)
        Local $iLineSpacing = _GDIPlus_FontFamilyGetLineSpacing($hFamily, $iStyle)
        Local $iAscent = $iFontHeight / $iLineSpacing * _GDIPlus_FontFamilyGetCellAscent($hFamily, $iStyle)
        Local $iDescent = $iFontHeight / $iLineSpacing * _GDIPlus_FontFamilyGetCellDescent($hFamily, $iStyle)

        Local $aDim[9]
        $aDim[0] = $aBounds[0]
        $aDim[1] = $aBounds[1]
        $aDim[2] = $aBounds[2]
        $aDim[3] = $aBounds[3]
        $aDim[4] = DllStructGetData($aInfo[0], "Width")
        $aDim[5] = DllStructGetData($aInfo[0], "Height")
        $aDim[6] = $iFontHeight
        $aDim[7] = $iAscent
        $aDim[8] = $iDescent

        Return $aDim
EndFunc   ;==>_MeasureString