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Thanks for your argumentum, but it's a bit complex for me. The code I posted is small and simple. Thanks in advance.

Thank you for your response. I appreciate that you've taken time to share some insight and suggestions as well. I personally have never used Ternary before. I'm still quite new to AutoIt and have a lot to learn. So to be perfectly honest, I don't really have a good understanding of how or when to use Ternary over the other options. This thread (and possibly another thread or two) was really about trying to get the most performance out of, or better efficiency, of the _WinEventProc (SetWinEventHook) function of my Immersive UX project. Since all running processes on the system filter through it, finding various ways to make it more efficient has been incredibly helpful. With the help of this community, it has been really beneficial. If you are curious if Ternary can fit in anywhere and if you have a few minutes, you can have a peak at the hook function (https://github.com/WildByDesign/ImmersiveUX/blob/main/ImmersiveEngine.au3#L587). It's got a lot of things that help make it more efficient, but I am always open to more. And most importantly, I am always interested in learning more.

I see that the 'trick' was the change of approach from _GDIPlus_GraphicsFillPie to _GDIPlus_GraphicsDrawArc, and the truth is that I tried it all afternoon yesterday, with _GDIPlus_GraphicsDrawArc, I didn't succeed (I didn't know) Thank you very much for the intervention, and the enlightenment Update to Version: 0.6 in the first post

To use _WinAPI_BitmapDisplayTransparentInGUI() you must create a complete frame within the function. Example: ; https://www.autoitscript.com/forum/topic/213118-_circularprogress/ ;---------------------------------------------------------------------------------------- ; Title...........: _CircularProgress.au3 ; Description.....: Creates a customizable circular progress bar using GDI+ graphics. ; AutoIt Version..: 3.3.16.1 Author: ioa747 Script Version: 0.5 ; Note............: Testet in Win10 22H2 Date:08/09/2025 ; Based on post ..: https://www.autoitscript.com/forum/topic/213113-simple-circular-progressbar-with-smooth-edges-gradient-color/#findComment-1545755 ;---------------------------------------------------------------------------------------- #AutoIt3Wrapper_Au3Check_Parameters=-d -w 1 -w 2 -w 3 -w 4 -w 5 -w 6 -w 7 #include <GDIPlus.au3> #include <GUIConstantsEx.au3> #include <WinAPISysWin.au3> #include <Constants.au3> #include <WindowsConstants.au3> #include <WinAPIConstants.au3> #include <Array.au3> _GDIPlus_Startup() Global $hGUI _Example() ; as demo _GDIPlus_Shutdown() Func _Example() $hGUI = GUICreate("RingProgressBar", 300, 300, -1, -1, $WS_POPUP, BitOR($WS_EX_LAYERED, $WS_EX_TOPMOST)) GUISetState(@SW_SHOW) Local $aList[2000] Local $iCnt = UBound($aList) ConsoleWrite("$iCnt=" & $iCnt & @CRLF) Local $nProgress For $i = 1 To UBound($aList) $nProgress = Int($i / $iCnt * 100) ConsoleWrite($i & ") $nProgress=" & $nProgress & @CRLF) _CircularProgress($nProgress) Next Sleep(200) ; Give it some time to see the 100%. EndFunc ;==>_Example ; #FUNCTION# ==================================================================================================================== ; Name...........: _CircularProgress ; Description....: Creates a customizable circular progress bar using GDI+ graphics. ; Syntax.........: _CircularProgress($iPercent [, $iLeft = -1 [, $iTop = -1 [, $iSize = 300 [, $iThickness = 30 [, $TextCol = 0xFFFFFF [, $StartCol = 0xFF0000, $EndCol = 0xFFFF00]]]]]]) ; Parameters.....: $iPercent - The percentage complete for the progress bar (0 to 100). ; $iLeft - [optional] X-coordinate of the top-left corner. (Default is -1 for center) ; $iTop - [optional] Y-coordinate of the top-left corner. (Default is -1 for center) ; $iSize - [optional] width and height of the circular progress bar. (Default is 300) ; $iThickness - [optional] Thickness of the progress arc. (Default is 30) ; $TextCol - [optional] Color of the text within the progress bar. (Default is White) ; $StartCol - [optional] Start color of the progress arc gradient. (Default is Yellow) ; $EndCol - [optional] End color of the progress arc gradient. (Default is Red) ; Return values .: Success: create the progress bar GUI ; Author ........: ioa747 ; Modified ......: 08/09/2025 - v0.5 ; Remarks .......: Cleanup is handled automatically by passing an $iPercent > 100. ; Avoid using 0x050505 Color for $TextCol, $StartCol, or $EndCol, as it is used as a transparency color for the background. ; Related .......: _GDIPlus_Startup, _GDIPlus_GraphicsCreateFromHWND, etc. ; Link ..........: https://www.autoitscript.com/forum/topic/213113-simple-circular-progressbar-with-smooth-edges-gradient-color/#findComment-1545755 ; Example .......: _CircularProgress(50, -1, -1, 300, 20, 0x00FF00, 0xFF00FF, 0xFFFFFF) ; =============================================================================================================================== Func _CircularProgress($iPercent, $iSize = 300, $iThickness = 30, $TextCol = 0xFF404040, $StartCol = 0xFFFFFF00, $EndCol = 0xFFFF0000) Local $hBmp, $hBmpGraphics, $inSize, $iRadius, $iX, $iY $inSize = $iSize $iRadius = ($inSize - 4) / 2 $iX = $inSize / 2 $iY = $iX ; Create an off-screen bitmap for double-buffering $hBmp = _GDIPlus_BitmapCreateFromScan0($inSize, $inSize) $hBmpGraphics = _GDIPlus_ImageGetGraphicsContext($hBmp) _GDIPlus_GraphicsSetSmoothingMode($hBmpGraphics, 4) _GDIPlus_GraphicsSetTextRenderingHint($hBmpGraphics, 4) ; Draw progress arc as pie Local $angle = ($iPercent / 100) * 360 Local $hBrushProg = _GDIPlus_LineBrushCreate($iX - $iRadius, $iY, $iX + $iRadius, $iY, $EndCol, $StartCol, 1) Local $hPen = _GDIPlus_PenCreate2($hBrushProg, $iThickness) _GDIPlus_GraphicsDrawArc($hBmpGraphics, $iX - $iRadius + $iThickness / 2, $iY - $iRadius + $iThickness / 2, $iRadius * 2 - $iThickness, $iRadius * 2 - $iThickness, -90, $angle, $hPen) _GDIPlus_BrushDispose($hBrushProg) _GDIPlus_PenDispose($hPen) Local $hFontFamily = _GDIPlus_FontFamilyCreate("Times New Roman") Local $iFontSize = $iRadius * 0.3 Local $hFont = _GDIPlus_FontCreate($hFontFamily, $iFontSize, 1) Local $hFormat = _GDIPlus_StringFormatCreate() _GDIPlus_StringFormatSetAlign($hFormat, 2) _GDIPlus_StringFormatSetLineAlign($hFormat, 2) Local $hBrushText = _GDIPlus_BrushCreateSolid($TextCol) ; Draw percentage text Local $rect = _GDIPlus_RectFCreate(($inSize - ($iFontSize * 4)) / 2, ($inSize - ($iFontSize * 2)) / 2, $iFontSize * 4, $iFontSize * 2) _GDIPlus_GraphicsDrawStringEx($hBmpGraphics, $iPercent & "%", $hFont, $rect, $hFormat, $hBrushText) _GDIPlus_FontFamilyDispose($hFontFamily) _GDIPlus_FontDispose($hFont) _GDIPlus_StringFormatDispose($hFormat) _GDIPlus_BrushDispose($hBrushText) Local $hHBmp = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hBmp) _WinAPI_BitmapDisplayTransparentInGUI($hHBmp, $hGUI) _GDIPlus_BitmapDispose($hBmp) _GDIPlus_GraphicsDispose($hBmpGraphics) EndFunc ;==>_CircularProgress Func _WinAPI_BitmapDisplayTransparentInGUI(ByRef $hHBitmap, ByRef $hGUI, $iOpacity = 0xFF, $iFlags = $ULW_ALPHA, $bReleaseGDI = True, $tDest = Null, $iBGR = 0) If Not BitAND(GUIGetStyle($hGUI)[1], $WS_EX_LAYERED) = $WS_EX_LAYERED Then Return SetError(1, 0, 0) Local $tDim = DllStructCreate($tagBITMAP) If Not _WinAPI_GetObject($hHBitmap, DllStructGetSize($tDim), DllStructGetPtr($tDim)) Then Return SetError(2, 0, 0) Local $tSize = DllStructCreate($tagSIZE), $tSource = DllStructCreate($tagPOINT), $tBlend = DllStructCreate($tagBLENDFUNCTION) Local Const $hScrDC = _WinAPI_GetDC(0), $hMemDC = _WinAPI_CreateCompatibleDC($hScrDC), $hOld = _WinAPI_SelectObject($hMemDC, $hHBitmap) $tSize.X = $tDim.bmWidth $tSize.Y = $tDim.bmHeight $tBlend.Alpha = $iOpacity $tBlend.Format = 1 _WinAPI_UpdateLayeredWindow($hGUI, $hScrDC, $tDest, $tSize, $hMemDC, $tSource, $iBGR, $tBlend, $iFlags) _WinAPI_ReleaseDC(0, $hScrDC) _WinAPI_SelectObject($hMemDC, $hOld) _WinAPI_DeleteDC($hMemDC) If $bReleaseGDI Then _WinAPI_DeleteObject($hHBitmap) Return True EndFunc ;==>_WinAPI_BitmapDisplayTransparentInGUI If you have static variable, such as bitmap, brushes, etc., you can put out these parts off the _CircularProgress() function.