Color & Transparency Control and Saved in Image File.

[Malkey]

For some time now I have been trying to save a multi-colored image to a file with one picked color appearing as transparent.

This is my first success. It manipulates a screen capture. It 's a start.

This script

Pros - This enables maniputation of all individual colors in an image. Like, able to change the alpha channel of a RGB or , change any RGB to any other ARGB (Alpha,Red,Green,Blue). Alpha channel value being the RGB degree of visibility, ranging from 0x00, invisible, to 0xFF, opaque.

Cons - It is painfully slow. The only thing left I can think of to speed the process up is to remove the progress bar.

If anyone knows or can think of a method that is really fast and can change at least one picked color to be transparent when saved to an image file all with AutoIt script, please tell or show. I would really like to know.

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#include <GuiConstantsEx.au3>
#include <GDIPlus.au3>
#include <ScreenCapture.au3>
#include <WinAPI.au3>
#include <WindowsConstants.au3>

; NomadMemory.au3 at
; http://www.autoitscript.com/forum/index.php?s=&showtopic=19329&view=findpost&p=394082

Opt('MustDeclareVars', 1)
Opt("PixelCoordMode", 0)

; Array to make white transparent
;local $aColorAlpha[2] = [1, 0x00FFFFFF]            ; Change Alpha value on one color

; Array to make white transparent & Red almost transparent
Local $aColorAlpha[3] = [2, 0x00FFFFFF, 0x10FF0000] ; Change Alpha value on two colors

; Array to make white to slightly visible yellow
;local $aColorSwap[2][2] = [[1,0],[0xFFFFFF,0x10FFFF00]] ; Swap one color with another

; Array to make white to slightly visible yellow & Black to a fully visible red.
Local $aColorSwap[3][2] = [[2, 0],[0xFFFFFF, 0x10FFFF00], _
                                  [0x000000, 0xFFFF0000]]  ;  Swap two colors

; To get started - Comment and/or uncomment the above arrays and enter into command below.
;ImageColorChange($aColorAlpha, 300, 200)  ; <================= START FUNCTION HERE ======= 
ImageColorChange($aColorSwap, 300, 200)    ; <============ or HERE

ShellExecute(@DesktopDir & "\TestWrite.png")
; Loop until user exits
Do
    Sleep(10)
Until GUIGetMsg() = $GUI_EVENT_CLOSE

FileDelete(@DesktopDir & "\TestWrite.png")

; ==========================================
; Description - Either changes Alpha channel of one or more selected colors ; or
;               Changes one or more colors to other colors.
; Input - $aColor is an array. Either single or two dimensional array.
;             - Single array to change Alpha channel (transparency)
;               $aColorAlpha[0] contains number of colors to be changed.
;               Colors entered are in 0xAARRGGBB format where
;               AA is the new required Alpha value. Range is 00 to FF. 00 is completely invisible.
;               RRGGBB is the color which will have its alpha channel changed. FF0000 is Red.
;
;             - Two dimensional array to swap colors.
;               $aColorSwap[0][0] contains number of colors to be swapped.
;               $aColorSwap[1+n][0] is the color to replace in 0xRRGGBB format.
;               $aColorSwap[1+n][1] is the replacement color in 0xAARRGGBB format.
;        - $iWidth & $iHeight for Width and Height of image
;
Func ImageColorChange(ByRef $aColor, $iWidth = -1, $iHeight = -1)
    Local Const $ULW_ALPHA = 2
    Local $hGUI, $hBitmap, $hGraphic, $hImage, $hGUIFake
    Local $width, $height, $format, $Value, $hBitmap1, $hBitmap3, $hImage2
    Local $hWnd, $hDC, $pSize, $tSize, $pSource, $tSource, $pBlend, $tBlend, $Reslt
    Local $ReadMaterial, $sCLSID, $GuiSizeX, $GuiSizeY, $iOpacity = 255,$dat,$x,$y
    Local $addr,$v_Value,$v_Buffer, $stride, $Scan0, $memOpen
    If $iWidth = -1 Then
        $GuiSizeX = 600
    Else
        $GuiSizeX = $iWidth
    EndIf
    If $iHeight = -1 Then
        $GuiSizeY = 500
    Else
        $GuiSizeY = $iHeight
    EndIf
    ;MsgBox(0,"",UBound($aColor, 2))
    ; Create GUI's
    $hGUI = GUICreate("GDI+", $GuiSizeX, $GuiSizeY, -1, -1, 0, ($WS_EX_LAYERED))
    GUISetState()
    $hGUIFake = GUICreate("GDI+ FAKE", 600, 300, @DesktopWidth / 4, @DesktopHeight / 8)
    GUISetBkColor(0xFFFFB0)
    GUISetState()
    _GDIPlus_Startup()
    
    $hWnd = _WinAPI_GetDC($hGUI)
    $hDC = _WinAPI_CreateCompatibleDC($hWnd)
    $hBitmap = _WinAPI_CreateCompatibleBitmap($hWnd, $GuiSizeX, $GuiSizeY)
    _WinAPI_SelectObject($hDC, $hBitmap)
    $hGraphic = _GDIPlus_GraphicsCreateFromHDC($hDC)
    $hImage = _GDIPlus_BitmapCreateFromHBITMAP($hBitmap)
    _GDIPlus_GraphicsClear($hGraphic, 0x00CC8040)
    ;$iWidth = _GDIPlus_ImageGetWidth ($hImage)
    ;$iHeight = _GDIPlus_ImageGetHeight ($hImage)
    $hBitmap3 = _ScreenCapture_Capture("", 0, 0, $GuiSizeX, $GuiSizeY, False)
    $hImage2 = _GDIPlus_BitmapCreateFromHBITMAP($hBitmap3)
    $hBitmap1 = _GDIPlus_BitmapCloneArea($hImage2, 0, 0, $GuiSizeX, $GuiSizeY, $GDIP_PXF32ARGB)
    $ReadMaterial = "The bitmap image is loading." & @CRLF & @CRLF & _
            "A snap shot of the top left quarter of the screen will be manipulated. " & @CRLF & _
            "This window will be deleted when the colored pixels have been changed in " & @CRLF & _
            "the area of memory where the bitmap is stored.On final exit, the png file " & @CRLF & _
            "saved to desktop will be deleted." & @CRLF & @CRLF
    
    ProgressOn("Progress Bar", "The bitmap image is loading.", "0 percent")
    
    $Reslt = _GDIPlus_BitmapLockBits ($hBitmap1, 0, 0, $GuiSizeX, $GuiSizeY, BitOR($GDIP_ILMREAD, $GDIP_ILMWRITE) , $GDIP_PXF32ARGB) 
    
    ;Get the returned values of _GDIPlus_BitmapLockBits ()
    $width = DllStructGetData($Reslt, "width")
    $height = DllStructGetData($Reslt, "height")
    $stride = DllStructGetData($Reslt, "stride")
    $format = DllStructGetData($Reslt, "format")
    $Scan0 = DllStructGetData($Reslt, "Scan0")
    ; See GDIPlusConstants.au3 (Line 115+) for format Numbers
    $ReadMaterial &= "Contents of $tagGDIPBITMAPDATA. (The output of the _GDIPlus_BitmapLockBits() function):" & @CRLF & _
            "width:  " & $width & @CRLF & _
            "height: " & $height & @CRLF & _
            "stride: " & $stride & @CRLF & _
            "format: " & Hex($format, 8) & @CRLF & _
            "Scan0 : " & $Scan0
    $memOpen = _MemoryOpen(_WinAPI_GetCurrentProcessID())
    GUISetCursor(1)
    GUICtrlCreateLabel($ReadMaterial, 10, 10, 580, 480)
    GUICtrlSetFont(-1, 11, 500)
    
    ;Change Alpha Channel - single dimensional array
    If UBound($aColor, 2) = 0 Then
        For $i = 1 To $GuiSizeX
            For $j = 20 To $GuiSizeY + 20
                For $n = 1 To $aColor[0]
                    ;#cs
                    ;_MemoryRead($Scan0 + (($y - 21) * $stride) + (($x - 1) * 4), $memOpen)
                    $v_Buffer = DllStructCreate('dword')
                    $addr = $Scan0 + (($j - 21) * $stride) + (($i - 1) * 4)
                    DllCall($memOpen[0], 'int', 'ReadProcessMemory', _
                                         'int', $memOpen[1], _
                                         'int', $addr, _
                                         'ptr', DllStructGetPtr($v_Buffer), _
                                         'int', DllStructGetSize($v_Buffer), 'int', '')
                    $v_Value = DllStructGetData($v_Buffer, 1)                   
                    ;ConsoleWrite("$v_Value    " & hex($v_Value) & @CRLF)
                    If Hex($v_Value, 6) = Hex($aColor[$n], 6) Then
                        DllStructSetData($v_Buffer, 1, ($aColor[$n]))                   
                        DllCall($memOpen[0], 'int', 'WriteProcessMemory', _
                                                'int', $memOpen[1], _
                                                'int', $addr, _
                                                'ptr', DllStructGetPtr($v_Buffer), _
                                                'int', DllStructGetSize($v_Buffer), 'int', '')                                          
                    EndIf                       
                    $v_Buffer = ""                  
                Next
            Next
            ;if GUIGetMsg() =  $GUI_EVENT_CLOSE then exit
            ProgressSet(Int(100 * $i / ($GuiSizeX)), Int(100 * $i / ($GuiSizeX)) & " percent")
        Next
    EndIf
    
    ;Swap colors - 2 dimensional array
    If UBound($aColor, 2) = 2 Then
        For $i = 1 To $GuiSizeX
            For $j = 20 To $GuiSizeY + 20
                For $n = 1 To $aColor[0][0]
                    $v_Buffer = DllStructCreate('dword')
                    $addr = $Scan0 + (($j - 21) * $stride) + (($i - 1) * 4)
                    DllCall($memOpen[0], 'int', 'ReadProcessMemory', _
                    'int', $memOpen[1], 'int', $addr, _
                    'ptr', DllStructGetPtr($v_Buffer), 'int', DllStructGetSize($v_Buffer), 'int', '')
                    $v_Value = DllStructGetData($v_Buffer, 1)                   
                    ;ConsoleWrite("$v_Value    " & hex($v_Value) & @CRLF)
                    If Hex($v_Value, 6) = Hex($aColor[$n][0], 6) Then
                        DllStructSetData($v_Buffer, 1, ($aColor[$n][1]))                    
                        DllCall($memOpen[0], 'int', 'WriteProcessMemory', _
                                                'int', $memOpen[1], _
                                                'int', $addr, _
                                                'ptr', DllStructGetPtr($v_Buffer), _
                                                'int', DllStructGetSize($v_Buffer), 'int', '')                                          
                    EndIf                       
                    $v_Buffer = ""  
                Next
            Next
            ;if GUIGetMsg() =  $GUI_EVENT_CLOSE then exit
            ProgressSet(Int(100 * $i / ($GuiSizeX)), Int(100 * $i / ($GuiSizeX)) & " percent")
        Next
    EndIf

    _MemoryClose($memOpen)
    
    _GDIPlus_BitmapUnlockBits($hBitmap1, $Reslt)
    GUISetCursor(2)
    ;MsgBox(0, "Ready to Continue", "Bitmap has loaded. Press  OK to continue.")
    GUIDelete($hGUIFake)
    ProgressOff()
    _GDIPlus_GraphicsDrawImage($hGraphic, $hBitmap1, 0, 0)
    
    $tSize = DllStructCreate($tagSIZE)
    $pSize = DllStructGetPtr($tSize)
    DllStructSetData($tSize, "X", $GuiSizeX)
    DllStructSetData($tSize, "Y", $GuiSizeY)
    $tSource = DllStructCreate($tagPOINT)
    $pSource = DllStructGetPtr($tSource)
    $tBlend = DllStructCreate($tagBLENDFUNCTION)
    $pBlend = DllStructGetPtr($tBlend)
    DllStructSetData($tBlend, "Alpha", $iOpacity) ;0xFFCC8040)Alpha
    DllStructSetData($tBlend, "Format", 1)
    _WinAPI_UpdateLayeredWindow($hGUI, $hWnd, 0, $pSize, $hDC, $pSource, 0, $pBlend, $ULW_ALPHA) ;$ULW_COLORKEY )
    
    ; Save to file
    $sCLSID = _GDIPlus_EncodersGetCLSID("PNG")
    _GDIPlus_ImageSaveToFileEx($hBitmap1, @DesktopDir & "\TestWrite.png", $sCLSID)
    
    ; Clean up resources
    _GDIPlus_GraphicsDispose($hGraphic)
    _WinAPI_DeleteObject($hImage)
    _WinAPI_DeleteObject($hImage2)
    _WinAPI_DeleteObject($hBitmap)
    _WinAPI_DeleteObject($hBitmap1)
    _WinAPI_DeleteObject($hBitmap3)
    _WinAPI_DeleteDC($hDC)
    _WinAPI_ReleaseDC($hGUI, $hWnd)
    _GDIPlus_Shutdown() 
    Return
EndFunc   ;==>ImageColorChange

;==================================================================================
; Author(s):        Nomad
Func _MemoryOpen($iv_Pid, $iv_DesiredAccess = 0x1F0FFF, $iv_InheritHandle = 1)
    If Not ProcessExists($iv_Pid) Then
        SetError(1)
        Return 0
    EndIf
    Local $ah_Handle[2] = [DllOpen('kernel32.dll')]
    If @error Then
        SetError(2)
        Return 0
    EndIf
    Local $av_OpenProcess = DllCall($ah_Handle[0], 'int', 'OpenProcess', 'int', $iv_DesiredAccess, _
            'int', $iv_InheritHandle, 'int', $iv_Pid)
    If @error Then
        DllClose($ah_Handle[0])
        SetError(3)
        Return 0
    EndIf
    $ah_Handle[1] = $av_OpenProcess[0]
    Return $ah_Handle
EndFunc   ;==>_MemoryOpen

;==================================================================================
; Author(s):        Nomad
Func _MemoryClose($ah_Handle)
    If Not IsArray($ah_Handle) Then
        SetError(1)
        Return 0
    EndIf
    DllCall($ah_Handle[0], 'int', 'CloseHandle', 'int', $ah_Handle[1])
    If Not @error Then
        DllClose($ah_Handle[0])
        Return 1
    Else
        DllClose($ah_Handle[0])
        SetError(2)
        Return 0
    EndIf
EndFunc   ;==>_MemoryClose

[Andreik]

Awsome! I like very much your scripts.

One question: shortcut sign from my icons is black and in your script is red. Why?

[Malkey]

Awsome! I like very much your scripts.

One question: shortcut sign from my icons is black and in your script is red. Why?

Good Question

In the script posted there is this near the start

; Array to make white to slightly visible yellow & Black to a fully visible red.

Local $aColorSwap[3][2] = [[2, 0],[0xFFFFFF, 0x10FFFF00], _

[0x000000, 0xFFFF0000]] ; Swap two colors

; To get started - Comment and/or uncomment the above arrays and enter into command below.

;ImageColorChange($aColorAlpha, 300, 200) ; <================= START FUNCTION HERE =======

ImageColorChange($aColorSwap, 300, 200) ; <============ or HERE

ImageColorChange() is using the $aColorSwap array. Looking at the contents of that array we have

[[2, 0],[0xFFFFFF, 0x10FFFF00], [0x000000, 0xFFFF0000]]

The script see $aColorSwap[0][0] = 2 meaning there are two colors to change

First colors are [0xFFFFFF, 0x10FFFF00], meaning white, 0xFFFFFF to slightly visible yellow,0x10FFFF00.

Second color [0x000000, 0xFFFF0000], meaning Black, 0x000000 to a fully visible red, 0xFFFF0000.

So the format is [0xRRGGBB, 0xAARRGGBB], meaning change color, 0xRRGGBB to this color, 0xAARRGGBB.

Hope this makes it clearer.

Edited July 29, 2008 by Malkey

[Andreik]

Nice explanation. I understand. Thanks.

[Malkey]

Thanks to weaponx for his example @

http://www.autoitscript.com/forum/index.ph...st&p=555694

This made me realize NomadMemory is not needed. This does speed the process up a little. But it is still not fast.

Here is the first post script again without the NomadMemory calls.

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#include <GuiConstantsEx.au3>
#include <GDIPlus.au3>
#include <ScreenCapture.au3>
#include <WinAPI.au3>
#include <WindowsConstants.au3>

; NomadMemory.au3 at
; http://www.autoitscript.com/forum/index.ph...st&p=394082

Opt('MustDeclareVars', 1)
Opt("PixelCoordMode", 0)

; Array to make white transparent
;local $aColorAlpha[2] = [1, 0x00FFFFFF]            ; Change Alpha value on one color

; Array to make white transparent & Red almost transparent
Local $aColorAlpha[3] = [2, 0x00FFFFFF, 0x10000000] ; Change Alpha value on two colors

; Array to make white to slightly visible yellow
;local $aColorSwap[2][2] = [[1,0],[0xFFFFFF,0x10FFFF00]] ; Swap one color with another

; Array to make white to slightly visible yellow & Black to a fully visible red.
Local $aColorSwap[3][2] = [[2, 0],[0xFFFFFF, 0x10FFFF00], _
                                  [0x000000, 0xFFFF0000]]  ;  Swap two colors

; To get started - Comment and/or uncomment the above arrays and enter into command below.
;ImageColorChange($aColorAlpha)  ; <================= START FUNCTION HERE =======
ImageColorChange($aColorSwap)    ; <============ or HERE

ShellExecute(@DesktopDir & "\TestWrite.png")
; Loop until user exits
Do
    Sleep(10)
Until GUIGetMsg() = $GUI_EVENT_CLOSE

FileDelete(@DesktopDir & "\TestWrite.png")

; ==========================================
; Description - Either changes Alpha channel of one or more selected colors ; or
;             Changes one or more colors to other colors.
; Input - $aColor is an array. Either single or two dimensional array.
;           - Single array to change Alpha channel (transparency)
;            $aColorAlpha[0] contains number of colors to be changed.
;            Colors entered are in 0xAARRGGBB format where
;            AA is the new required Alpha value. Range is 00 to FF. 00 is completely invisible.
;            RRGGBB is the color which will have its alpha channel changed. FF0000 is Red.
;
;             - Two dimensional array to swap colors.
;            $aColorSwap[0][0] contains number of colors to be swapped.
;            $aColorSwap[1+n][0] is the color to replace in 0xRRGGBB format.
;            $aColorSwap[1+n][1] is the replacement color in 0xAARRGGBB format.
;        - $iWidth & $iHeight for Width and Height of image
;
Func ImageColorChange(ByRef $aColor, $iWidth = -1, $iHeight = -1)
    Local Const $ULW_ALPHA = 2
    Local $hGUI, $hBitmap, $hGraphic, $hImage, $hGUIFake
    Local $width, $height, $format, $Value, $hBitmap1, $hBitmap3, $hImage2
    Local $hWnd, $hDC, $pSize, $tSize, $pSource, $tSource, $pBlend, $tBlend, $Reslt
    Local $ReadMaterial, $sCLSID, $GuiSizeX, $GuiSizeY, $iOpacity = 255,$dat,$x,$y
    Local $addr,$v_Value,$v_Buffer, $stride, $Scan0, $memOpen
    If $iWidth = -1 Then
        $GuiSizeX = 600
    Else
        $GuiSizeX = $iWidth
    EndIf
    If $iHeight = -1 Then
        $GuiSizeY = 500
    Else
        $GuiSizeY = $iHeight
    EndIf
    ;MsgBox(0,"",UBound($aColor, 2))
    ; Create GUI's
    $hGUI = GUICreate("GDI+", $GuiSizeX, $GuiSizeY, -1, -1, 0, ($WS_EX_LAYERED))
    GUISetState()
    $hGUIFake = GUICreate("GDI+ FAKE", 600, 300, @DesktopWidth / 4, @DesktopHeight / 8)
    GUISetBkColor(0xFFFFB0)
    GUISetState()
    _GDIPlus_Startup()
   
    $hWnd = _WinAPI_GetDC($hGUI)
    $hDC = _WinAPI_CreateCompatibleDC($hWnd)
    $hBitmap = _WinAPI_CreateCompatibleBitmap($hWnd, $GuiSizeX, $GuiSizeY)
    _WinAPI_SelectObject($hDC, $hBitmap)
    $hGraphic = _GDIPlus_GraphicsCreateFromHDC($hDC)
    $hImage = _GDIPlus_BitmapCreateFromHBITMAP($hBitmap)
    _GDIPlus_GraphicsClear($hGraphic, 0x00CC8040)
    ;$iWidth = _GDIPlus_ImageGetWidth ($hImage)
    ;$iHeight = _GDIPlus_ImageGetHeight ($hImage)
    $hBitmap3 = _ScreenCapture_Capture("", 0, 0, $GuiSizeX, $GuiSizeY, False)
    $hImage2 = _GDIPlus_BitmapCreateFromHBITMAP($hBitmap3)
    $hBitmap1 = _GDIPlus_BitmapCloneArea($hImage2, 0, 0, $GuiSizeX, $GuiSizeY, $GDIP_PXF32ARGB)
    $ReadMaterial = "The bitmap image is loading." & @CRLF & @CRLF & _
            "A snap shot of the top left quarter of the screen will be manipulated. " & @CRLF & _
            "This window will be deleted when the colored pixels have been changed in " & @CRLF & _
            "the area of memory where the bitmap is stored.On final exit, the png file " & @CRLF & _
            "saved to desktop will be deleted." & @CRLF & @CRLF
   
    ProgressOn("Progress Bar", "The bitmap image is loading.", "0 percent")
   
    $Reslt = _GDIPlus_BitmapLockBits ($hBitmap1, 0, 0, $GuiSizeX, $GuiSizeY, BitOR($GDIP_ILMREAD, $GDIP_ILMWRITE) , $GDIP_PXF32ARGB)
   
    ;Get the returned values of _GDIPlus_BitmapLockBits ()
    $width = DllStructGetData($Reslt, "width")
    $height = DllStructGetData($Reslt, "height")
    $stride = DllStructGetData($Reslt, "stride")
    $format = DllStructGetData($Reslt, "format")
    $Scan0 = DllStructGetData($Reslt, "Scan0")
    ; See GDIPlusConstants.au3 (Line 115+) for format Numbers
    $ReadMaterial &= "Contents of $tagGDIPBITMAPDATA. (The output of the _GDIPlus_BitmapLockBits() function):" & @CRLF & _
            "width:  " & $width & @CRLF & _
            "height: " & $height & @CRLF & _
            "stride: " & $stride & @CRLF & _
            "format: " & Hex($format, 8) & @CRLF & _
            "Scan0 : " & $Scan0
    GUISetCursor(1)
    GUICtrlCreateLabel($ReadMaterial, 10, 10, 580, 480)
    GUICtrlSetFont(-1, 11, 500)
   
    ;Change Alpha Channel - single dimensional array
    If UBound($aColor, 2) = 0 Then
        For $i = 0 To $GuiSizeX - 1
            For $j = 0 To $GuiSizeY -1
                For $n = 1 To $aColor[0]                    
                    $v_Buffer = DllStructCreate("dword", $Scan0 + ($j  * $stride) + ($i  * 4))                  
                    $v_Value =DllStructGetData($v_Buffer, 1)               
                    If Hex($v_Value, 6) = Hex($aColor[$n], 6) Then
                        DllStructSetData($v_Buffer, 1, hex($aColor[$n],8))                 
                    EndIf                   
                Next
            Next
            ;if GUIGetMsg() =  $GUI_EVENT_CLOSE then exit
            ProgressSet(Int(100 * $i / ($GuiSizeX)), Int(100 * $i / ($GuiSizeX)) & " percent")
        Next
    EndIf
   
    ;Swap colors - 2 dimensional array
    If UBound($aColor, 2) = 2 Then
        For $i = 0 To $GuiSizeX - 1
             For $j = 0 To $GuiSizeY  -1                
                For $n = 0 To $aColor[0][0]
                    $v_Buffer = DllStructCreate("dword", $Scan0 + ($j  * $stride) + ($i  * 4))                    
                    $v_Value = DllStructGetData($v_Buffer, 1)               
                    If Hex($v_Value, 6) = Hex($aColor[$n][0], 6) Then
                        DllStructSetData($v_Buffer, 1, hex($aColor[$n][1],8))   
                    EndIf            
                Next
            Next
            ;if GUIGetMsg() =  $GUI_EVENT_CLOSE then exit
            ProgressSet(Int(100 * $i / ($GuiSizeX)), Int(100 * $i / ($GuiSizeX)) & " percent")
        Next
    EndIf
   
    _GDIPlus_BitmapUnlockBits($hBitmap1, $Reslt)
    GUISetCursor(2)
    ;MsgBox(0, "Ready to Continue", "Bitmap has loaded. Press  OK to continue.")
    GUIDelete($hGUIFake)
    ProgressOff()
    _GDIPlus_GraphicsDrawImage($hGraphic, $hBitmap1, 0, 0)
   
    $tSize = DllStructCreate($tagSIZE)
    $pSize = DllStructGetPtr($tSize)
    DllStructSetData($tSize, "X", $GuiSizeX)
    DllStructSetData($tSize, "Y", $GuiSizeY )
    $tSource = DllStructCreate($tagPOINT)
    $pSource = DllStructGetPtr($tSource)
    $tBlend = DllStructCreate($tagBLENDFUNCTION)
    $pBlend = DllStructGetPtr($tBlend)
    DllStructSetData($tBlend, "Alpha", $iOpacity) ;0xFFCC8040)Alpha
    DllStructSetData($tBlend, "Format", 1)
    _WinAPI_UpdateLayeredWindow($hGUI, $hWnd, 0, $pSize, $hDC, $pSource, 0, $pBlend, $ULW_ALPHA) ;$ULW_COLORKEY )
   
    ; Save to file
    $sCLSID = _GDIPlus_EncodersGetCLSID("PNG")
    _GDIPlus_ImageSaveToFileEx($hBitmap1, @DesktopDir & "\TestWrite.png", $sCLSID)
   
    ; Clean up resources
    _GDIPlus_GraphicsDispose($hGraphic)
    _WinAPI_DeleteObject($hImage)
    _WinAPI_DeleteObject($hImage2)
    _WinAPI_DeleteObject($hBitmap)
    _WinAPI_DeleteObject($hBitmap1)
    _WinAPI_DeleteObject($hBitmap3)
    _WinAPI_DeleteDC($hDC)
    _WinAPI_ReleaseDC($hGUI, $hWnd)
    _GDIPlus_Shutdown() 
    Return
EndFunc   ;==>ImageColorChange