Here some graphical examples written completely in FreeBasic just for fun.  
_WinAPI_SetWindowTitleIcon Check for Numeric Entry in an EditBox using RegEx CreateWindowEx (hGUI) Example FB 3D Starfield Rotating Flight FB File2Bas Code Generator FB Fire Particles FB Fireworks FB GFX Examples FB Image to Trapezoid Transformation FB Layered Parallax Effect FB Plasma FB Puristic Clock FB Rotating Cube FB Rotating Earth FB Rutt Etra Izer Effect FB Simple Recursive Tree Generator FB Snowfall FB Tunnel Flight FB Water Effect FMOD Examples GDI - GDI+ 3D Sinus Wave GDI - GDI+ Animated Pythagoras Tree GDI - GDI+ Bezier Lines GDI - GDI+ Particles - Repulsive Force Sim v2.0 GDI - GDI+ Plasma v5 Booster GDI - GDI+ Random Pattern GDI - GDI+ Space Flight GDI - GDI+ Tunnel Flight - WipeOut Style GDI Classic Raytraced Tunnel GDI Elastic Twister Effect GDI Exploding Pixels GDI Infinite Image Zoom Flight GDI Liquid Pixels GDI Mandelbrot GDI Particle Repulsion Grid GDI Particles Mouse Attraction GDI Starfield GDI The Nautilus Raymarcher GDI Worm Tunnel Flight GDI+ 3D Starfield Scrolling v1 Booster GDI+ 3D Starfield Scrolling v3 Booster GDI+ Convert Bitmap to ASCII GDI+ GIF Anim to ASCII Player GDI+ Image Painting GDI+ Impossible Possible GDI+ Kaleidoscope GDI+ Performance Test - Au3 vs FB GDI+ Polar Clock GDI+ Rotating Earth GDI+ Spiral Text GDI+ Star Wars Scroller GDI+ Streamer GDI+ Swiss Railway Clock GDI+ The MATRIX Ini Read - Write Rutt_Etra_Izer_Booster Stack TitchySID uFMOD  
Download: FreeBasic Examples build 2019-05-08.rar
 
I will add new examples from time to time.
 
FreeBasic source codes are also included.
 

hello Im wondering if it is possible to process image in autoit like this
1. firstly there is colorfull wallpaper
2. Fill all colors (exception rose color) - with white
3. Fill rose color with black color
I see Gdi functions have things to manipulate images
https://imgur.com/a/lFdY26g

A little help here please !?
I'm trying to parse a file but the function is not working well! i think there is some thind doing wrong at FileRead()
Obs: username,password and API link below is fictitious
ConsoleWrite(">POST METHOD UPLOADING LOCAL IMAGE<" & @CRLF) _PostMethodTest() Func _PostMethodTest() Local Const $sAPIKey = '8f1e0a750088957' Local $sBoundary = "--------Boundary" Local $sHeaders = "Content-Type: multipart/form-data; boundary=" & $sBoundary & @CRLF Local $sData = '' Local $sFileName="image.jpg" Local $sFilePath="C:\Users\DELL\Desktop\" & $sFileName Local $hFile=FileOpen($sFilePath,16);16=$FO_BINARY Local $sFileData=FileRead($hFile) FileClose($hFile) $sData &= "--" & $sBoundary & @CRLF $sData &= 'Content-Disposition: form-data; name="myImage"; filename="' & $sFileName & '"' & @CRLF $sData &= 'Content-Type: application/upload' & @CRLF & @CRLF $sData &= BinaryToString($sFileData,0) & @CRLF $sData &= "--" & $sBoundary & @CRLF $sData &= 'Content-Disposition: form-data; name="username"' & @CRLF & @CRLF $sData &="myuserName" & @CRLF $sData &= "--" & $sBoundary & @CRLF $sData &= 'Content-Disposition: form-data; name="password"' & @CRLF & @CRLF $sData &="MyPassword" & @CRLF $sData &=$sBoundary & "--" ConsoleWrite($sData) Local $oHTTP = ObjCreate("winhttp.winhttprequest.5.1") $oHTTP.Open("POST", "http://myapi", False) $oHTTP.SetRequestHeader("Content-Type", "multipart/form-data; " & "boundary=" & $sBoundary) $oHTTP.SetRequestHeader("apikey", $sAPIKey) $oHTTP.Send(StringToBinary($sData,1)) Local $sReceived = $oHTTP.ResponseText ConsoleWrite($sReceived & @CRLF) EndFunc ;==>_PostMethodTest  

Here another example to mark the desktop to get the marked region for capturing. This example is not perfect and not very fast (room for improvements).
;coded by UEZ build 2018-11-30 beta ;code cleanup up mLipok #include <APISysConstants.au3> #include <Array.au3> #include <GDIPlus.au3> #include <GUIConstantsEx.au3> #include <WinAPIGdi.au3> #include <WinAPISysWin.au3> #include <WindowsConstants.au3> Global $__g_hGUI_MarkArea, $__g_hGUI_Bg, $__g_iLabel_TL, $__g_iLabel_TM, $__g_iLabel_TR, $__g_iLabel_LM, $__g_iLabel_RM, $__g_iLabel_BL, $__g_iLabel_BM, _ $__g_iLabel_BR, $__g_iOldCursor, $__g_iW, $__g_iH, $__g_iColor_ResizeDots = 0xFFFFFF, $__g_iBorder = 4, $__g_bSelectionDone = False Global $aRect = _GDIPlus_MarkScreenRegionAnimated() _ArrayDisplay($aRect, "Marked area coordinates") Func _GDIPlus_MarkScreenRegionAnimated($bAnim = True) _GDIPlus_Startup() Local Const $hFullScreen = WinGetHandle("[TITLE:Program Manager;CLASS:Progman]") Local Const $aFullScreen = WinGetPos($hFullScreen) $__g_hGUI_Bg = GUICreate("", $aFullScreen[2], $aFullScreen[3], $aFullScreen[0], $aFullScreen[1], BitOR($WS_CLIPCHILDREN, $WS_POPUP), $WS_EX_TOPMOST) ;to avoid cursor flickering and for proper control read WinSetTrans($__g_hGUI_Bg, "", 0x01) $__g_hGUI_MarkArea = GUICreate("", 1, 1, -1, -1, $bAnim ? $WS_POPUP : BitOR($WS_POPUP, $WS_BORDER), BitOR($WS_EX_TOPMOST, $WS_EX_LAYERED), $__g_hGUI_Bg) GUISetBkColor(0xABCDEF, $__g_hGUI_MarkArea) If Not $bAnim Then $__g_iColor_ResizeDots = 0xFF0000 $__g_iLabel_TL = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;top left GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_TM = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;top mid GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_TR = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;top right GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_LM = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;left mid GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_RM = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;right mid GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_BL = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;bottom left GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_BM = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;bottom mid GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_BR = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;bottom right GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) GUISetState(@SW_SHOWNA, $__g_hGUI_Bg) GUISetState(@SW_SHOW, $__g_hGUI_MarkArea) $__g_iOldCursor = MouseGetCursor() GUISetCursor(3, 1, $__g_hGUI_Bg) GUISetCursor(3, 1, $__g_hGUI_MarkArea) _WinAPI_SetLayeredWindowAttributes($__g_hGUI_MarkArea, 0xABCDEF, 0xF0) Local $aMPos, $aPrevMPos[2] = [MouseGetPos(0) + 1, MouseGetPos(1) + 1], $iID, $aCI, $iX, $iY, $aOldWinPos, $aOldMPos, $bMoved Local $aGUIStartPos, $iKey_Exit = GUICtrlCreateButton("", $aFullScreen[0] - 10, $aFullScreen[1] - 10, 1, 1), $aAccelKeys[1][2] = [["{ENTER}", $iKey_Exit]] GUISetAccelerators($aAccelKeys, $__g_hGUI_Bg) GUISetAccelerators($aAccelKeys, $__g_hGUI_MarkArea) #forceref $bMoved Do Switch GUIGetMsg() Case $GUI_EVENT_CLOSE, $iKey_Exit If $bAnim Then GUIRegisterMsg($WM_TIMER, "") DllCall("user32.dll", "bool", "KillTimer", "hwnd", $__g_hGUI_MarkArea, "uint_ptr", $iID) GUIRegisterMsg($WM_ERASEBKGND, "") EndIf _GDIPlus_Shutdown() Local $aResult = WinGetPos($__g_hGUI_MarkArea) $aResult[2] = WinGetClientSize($__g_hGUI_MarkArea)[0] $aResult[3] = WinGetClientSize($__g_hGUI_MarkArea)[1] GUIDelete($__g_hGUI_MarkArea) GUIDelete($__g_hGUI_Bg) If Not $__g_bSelectionDone Then $aResult = 0 Return $aResult EndSwitch $aMPos = MouseGetPos() If ($aMPos[0] <> $aPrevMPos[0] Or $aMPos[1] <> $aPrevMPos[1]) And (Not $__g_bSelectionDone) Then WinMove($__g_hGUI_MarkArea, "", $aMPos[0], $aMPos[1]) $aPrevMPos = $aMPos EndIf $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) If $aCI[2] And (Not $__g_bSelectionDone) Then $aGUIStartPos = WinGetPos($__g_hGUI_MarkArea) If $bAnim Then GUIRegisterMsg($WM_ERASEBKGND, "WM_ERASEBKGND") GUIRegisterMsg($WM_TIMER, "PlayBorderAnim") $iID = DllCall("User32.dll", "uint_ptr", "SetTimer", "hwnd", $__g_hGUI_MarkArea, "uint_ptr", 1, "uint", 50, "ptr", 0)[0] EndIf While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) $aMPos = MouseGetPos() $__g_iW = Abs($aMPos[0] - $aGUIStartPos[0]) + 1 $__g_iH = Abs($aMPos[1] - $aGUIStartPos[1]) + 1 If $aMPos[0] < $aGUIStartPos[0] Then $iX = $aMPos[0] Else $iX = $aGUIStartPos[0] EndIf If $aMPos[1] < $aGUIStartPos[1] Then $iY = $aMPos[1] Else $iY = $aGUIStartPos[1] EndIf WinMove($__g_hGUI_MarkArea, "", $iX, $iY, $__g_iW, $__g_iH) UpdateCtrlPos($bAnim) WEnd $__g_bSelectionDone = True GUISetCursor(3, 1, $__g_hGUI_MarkArea) ElseIf $aCI[3] And $__g_bSelectionDone Then $aGUIStartPos = WinGetPos($__g_hGUI_MarkArea) If _WinAPI_PtInRectEx(MouseGetPos(0), MouseGetPos(1), $aGUIStartPos[0], $aGUIStartPos[1], $aGUIStartPos[0] + $aGUIStartPos[2], $aGUIStartPos[1] + $aGUIStartPos[3]) Then $aMPos = MouseGetPos() $aGUIStartPos = WinGetPos($__g_hGUI_MarkArea) While $aCI[3] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", $aGUIStartPos[0] - ($aMPos[0] - MouseGetPos(0)), $aGUIStartPos[1] - ($aMPos[1] - MouseGetPos(1)), $__g_iW, $__g_iH) GUISetCursor(0, 1, $__g_hGUI_Bg) GUISetCursor(0, 1, $__g_hGUI_MarkArea) WEnd GUISetCursor(3, 1, $__g_hGUI_Bg) GUISetCursor(3, 1, $__g_hGUI_MarkArea) EndIf EndIf If $__g_bSelectionDone Then $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) If @error Then ContinueLoop Switch $aCI[4] Case $__g_iLabel_TL GUISetCursor(12, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", MouseGetPos(0), MouseGetPos(1), $aOldWinPos[2] + ($aOldMPos[0] - MouseGetPos(0)), $aOldWinPos[3] + ($aOldMPos[1] - MouseGetPos(1))) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_BR GUISetCursor(12, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", $aOldWinPos[0], $aOldWinPos[1], $aOldWinPos[2] - ($aOldMPos[0] - MouseGetPos(0)), $aOldWinPos[3] - ($aOldMPos[1] - MouseGetPos(1))) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_TR GUISetCursor(10, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", $aOldWinPos[0], MouseGetPos(1), $aOldWinPos[2] - ($aOldMPos[0] - MouseGetPos(0)), $aOldWinPos[3] + ($aOldMPos[1] - MouseGetPos(1))) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_BL GUISetCursor(10, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", MouseGetPos(0), $aOldWinPos[1], $aOldWinPos[2] + ($aOldMPos[0] - MouseGetPos(0)), $aOldWinPos[3] - ($aOldMPos[1] - MouseGetPos(1))) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_LM GUISetCursor(13, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", MouseGetPos(0), $aOldWinPos[1], $aOldWinPos[2] + ($aOldMPos[0] - MouseGetPos(0)), $aOldWinPos[3]) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_RM GUISetCursor(13, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", $aOldWinPos[0], $aOldWinPos[1], $aOldWinPos[2] - ($aOldMPos[0] - MouseGetPos(0)), $aOldWinPos[3]) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_TM GUISetCursor(11, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", $aOldWinPos[0], MouseGetPos(1), $aOldWinPos[2], $aOldWinPos[3] + ($aOldMPos[1] - MouseGetPos(1))) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_BM GUISetCursor(11, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", $aOldWinPos[0], $aOldWinPos[1], $aOldWinPos[2], $aOldWinPos[3] - ($aOldMPos[1] - MouseGetPos(1))) WEnd UpdateCtrlPos($bAnim) EndIf Case Else GUISetCursor(3, 1, $__g_hGUI_MarkArea) EndSwitch EndIf Until False EndFunc ;==>_GDIPlus_MarkScreenRegionAnimated Func UpdateCtrlPos($bAnim = True) Local Const $aGUIStartPos = WinGetPos($__g_hGUI_MarkArea) If $__g_bSelectionDone And $bAnim Then GUIRegisterMsg($WM_TIMER, "") $__g_iW = $aGUIStartPos[2] $__g_iH = $aGUIStartPos[3] ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_TL, 0, 0, $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_TM, ($__g_iW - $__g_iBorder) / 2, 0, $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_TR, ($__g_iW - $__g_iBorder - $__g_iBorder / 2), 0, $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_LM, 0, ($__g_iH - $__g_iBorder) / 2, $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_RM, ($__g_iW - $__g_iBorder - $__g_iBorder / 2), ($__g_iH - $__g_iBorder) / 2, $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_BL, 0, ($__g_iH - $__g_iBorder - $__g_iBorder / 2), $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_BM, ($__g_iW - $__g_iBorder) / 2, ($__g_iH - $__g_iBorder - $__g_iBorder / 2), $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_BR, ($__g_iW - $__g_iBorder - $__g_iBorder / 2), ($__g_iH - $__g_iBorder - $__g_iBorder / 2), $__g_iBorder, $__g_iBorder) If $__g_bSelectionDone And $bAnim Then GUIRegisterMsg($WM_TIMER, "PlayBorderAnim") EndFunc ;==>UpdateCtrlPos Func PlayBorderAnim() Local $aWinPos = WinGetClientSize($__g_hGUI_MarkArea), $iW = $aWinPos[0], $iH = $aWinPos[1] Local Static $fOffset = 0 Local Const $iSize = $__g_iBorder / 2 Local Const $hDC = _WinAPI_GetDC($__g_hGUI_MarkArea) Local Const $hHBitmap = _WinAPI_CreateCompatibleBitmap($hDC, $iW, $iH) Local Const $hDC_backbuffer = _WinAPI_CreateCompatibleDC($hDC) Local Const $DC_obj = _WinAPI_SelectObject($hDC_backbuffer, $hHBitmap) Local Const $hCanvas = _GDIPlus_GraphicsCreateFromHDC($hDC_backbuffer) Local Const $hPen = _GDIPlus_PenCreate(0xFF0178D7, $iSize), $hPen2 = _GDIPlus_PenCreate(0xFFFFFFFF, $iSize), _ $hBrush = _GDIPlus_BrushCreateSolid(0xFF000000 + $__g_iColor_ResizeDots), $hPen3 = _GDIPlus_PenCreate(0xFF000000) _GDIPlus_PenSetDashStyle($hPen, $GDIP_DASHSTYLEDASHDOT) _GDIPlus_GraphicsClear($hCanvas, 0xFFABCDEF) ;for faster performance direct dll calls DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen2, "float", 1 + $iSize, "float", 1 + $iSize, "float", $iW - 2 * $iSize - 2, "float", $iH - 2 * $iSize - 2) DllCall($__g_hGDIPDll, "int", "GdipSetPenDashOffset", "handle", $hPen, "float", $fOffset) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen, "float", 1 + $iSize, "float", 1 + $iSize, "float", $iW - 2 * $iSize - 2, "float", $iH - 2 * $iSize - 2) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", 0, "float", 0, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", 0, "float", 0, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", ($iW - $__g_iBorder) / 2, "float", 0, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", ($iW - $__g_iBorder) / 2, "float", 0, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", ($iW - $__g_iBorder) - 2, "float", 0, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", ($iW - $__g_iBorder) - 2, "float", 0, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", 0, "float", ($iH - $__g_iBorder) / 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", 0, "float", ($iH - $__g_iBorder) / 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", ($iW - $__g_iBorder) - 2, "float", ($iH - $__g_iBorder) / 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", ($iW - $__g_iBorder) - 2, "float", ($iH - $__g_iBorder) / 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", 0, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", 0, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", ($iW - $__g_iBorder) / 2, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", ($iW - $__g_iBorder) / 2, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", ($iW - $__g_iBorder) - 2, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", ($iW - $__g_iBorder) - 2, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) _WinAPI_BitBlt($hDC, 0, 0, $iW, $iH, $hDC_backbuffer, 0, 0, $SRCCOPY) $fOffset += 0.5 _GDIPlus_GraphicsDispose($hCanvas) _WinAPI_SelectObject($hDC_backbuffer, $DC_obj) _WinAPI_DeleteDC($hDC_backbuffer) _WinAPI_DeleteObject($hHBitmap) _WinAPI_ReleaseDC($__g_hGUI_MarkArea, $hDC) _GDIPlus_PenDispose($hPen) _GDIPlus_PenDispose($hPen2) _GDIPlus_PenDispose($hPen3) _GDIPlus_BrushDispose($hBrush) EndFunc ;==>PlayBorderAnim Func WM_ERASEBKGND($hWnd, $iMsgm, $wParam, $lParam) ;suppress repainting to avoid flickering but causes some other side effects #forceref $iMsgm, $wParam, $lParam, $hWnd Local Const $hBrush = _WinAPI_CreateSolidBrush(0xEFCDAB) ;BGR format ;~ _WinAPI_RedrawWindow($__g_hGUI_MarkArea, 0, 0, BitOR($RDW_NOERASE, $RDW_NOCHILDREN, $RDW_NOFRAME, $RDW_VALIDATE)) _WinAPI_SetClassLongEx($__g_hGUI_MarkArea, $GCL_HBRBACKGROUND, $hBrush) _WinAPI_DeleteObject($hBrush) Return 0 EndFunc ;==>WM_ERASEBKGND  
Just press the lmb and move your mouse. When lmb is released you can adjust the size of the window by dragging the white rectangle to any direction. Rmb will move the marked area.
Press ESC to get the coordinates of the marked region.
If you have any improvements, please post it here.
 
Tested on Win10 x64 only.
 

I was looking around the help file and I came across _GDIPlus_GraphicsDrawRect and _WinAPI_DrawLine and I seem to be having the same "problem" where every time it draws into a window and you lose or gain focus it has to redraw itself. Is there anyway around this? 
#include <WindowsConstants.au3> #include <WinAPI.au3> #Include <GDIPlus.au3> _GDIPlus_Startup() Run("notepad.exe") $hWnd = WinWait("Untitled") $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hWnd) $Color = 0xFFFF0000 $hPen = _GDIPlus_PenCreate($Color, 2) For $i = 1 To 10 _GDIPlus_GraphicsDrawRect($hGraphic, 200, 200, 25 ,25, $hPen) ToolTip($i) Sleep(1000) Next _WinAPI_RedrawWindow($hWnd, 0, 0, $RDW_INVALIDATE + $RDW_ALLCHILDREN) _GDIPlus_GraphicsDispose($hGraphic) _GDIPlus_PenDispose($hPen) _GDIPlus_Shutdown()