diff --git a/League.py b/League.py
index 6dd5da4..afedbc9 100644
--- a/League.py
+++ b/League.py
@@ -12,113 +12,229 @@
 import tkinter
 from tkinter import ttk
 
-
-# variables used in report script
-teamY = [ 130, 165, 200, 235 ]
-enemyY = [ 310, 345, 380, 415, 450 ]
-cwd = os.path.dirname(sys.argv[0]) if os.path.dirname(sys.argv[0]) != "" else "."
-debuglog = open('debuglog.log', 'w')
-
-class PreloadImage:
-	def loadFolderImage(path):
-		reportIcons = listdir(path)
+###########################################################
+# Class definitions:
+
+# new class for storing images like report icons, checkboxes...
+class Images:
+	# static variables
+	checkboxIm = None
+	commentTextIm = None
+	cancelIm = None
+	reportConfirmIm = None
+	reportButtonIm = None
+	leagueIm = None
+	reportText = None
+
+	# load all the static variables
+	@staticmethod
+	def initialize(cwd):
+		Images.checkboxIm = Image.open(cwd + '/image/' + 'checkbox.PNG')
+		Images.commentTextIm = Image.open(cwd + '/image/' + 'comment.PNG')
+		Images.cancelIm = Image.open(cwd + '/image/' + 'cancel.PNG')
+		Images.reportConfirmIm = Image.open(cwd + '/image/' + 'reportConfirm.PNG')
+		Images.reportButtonIm = Images.loadImageFromFolder(cwd + '/image/reportIcon')
+		Images.leagueIm = Images.loadImageFromFolder(cwd + '/image/AramIcon')
+		with open(cwd + '/' + 'reportText.txt', encoding='utf8') as file:
+			Images.reportText = file.read()
+
+	# static method that load images from folder.
+	@staticmethod 
+	def loadImageFromFolder(path):
+		files = listdir(path)
 		images = []
-		for i in reportIcons:
+		for i in files:
 			im = Image.open(path + '/' + i)
 			images.append(im)
-
 		return images
+# end of class Image
 
-	def windowEnumerationHandler(hwnd, top_windows):
-		top_windows.append((hwnd, win32gui.GetWindowText(hwnd)))
+# class for storing window rect and handler
+class WindowProperty:
+	#static variables
+	hwnd = None
+	rect = None
 
-	def getWindowHndlr(f):
-		top_windows = []
-		win32gui.EnumWindows(f, top_windows)
-		for i in top_windows:
-			if "league of legend" in i[1].lower():
-				#win32gui.ShowWindow(i[0], 9)
-				#win32gui.SetForegroundWindow(i[0])
-				break
-		return i[0]
+	# method passed to win32gui
+	@staticmethod
+	def windowEnumHandler(hwnd, top_windows):
+		top_windows.append((hwnd, win32gui.GetWindowText(hwnd)))
 
-	def getWindowSize(hwnd):
-		rect = win32gui.GetWindowRect(hwnd)
-		return (rect[0], rect[1], rect[2]-rect[0], rect[3]-rect[1])
-	
+	# bring league window to the front
+	@staticmethod
 	def bringFront(hwnd):
 		win32gui.ShowWindow(hwnd, 9)
 		win32gui.SetForegroundWindow(hwnd)
 
-	checkboxIm = Image.open(cwd + '/image/' + 'checkbox.PNG')
-	commentTextIm = Image.open(cwd + '/image/' + 'comment.PNG')
-	cancelIm = Image.open(cwd + '/image/' + 'cancel.PNG')
-	reportComfirmIm = Image.open(cwd + '/image/' + 'reportConfirm.PNG')
-	with open(cwd + '/' + 'reportText.txt', encoding='utf8') as file:
-		reportText = file.read()
-	reportButtonIms = loadFolderImage(cwd + '/image/reportIcon')
-	leaugeIcons = loadFolderImage(cwd + '/image/AramIcon')
-	windowHndlr = getWindowHndlr(windowEnumerationHandler)
-	windowSize = getWindowSize(windowHndlr)
-
-	
-def findLeagueIcon(windowSize):
-	for im in PreloadImage.leaugeIcons:
-		icon = pyautogui.locateCenterOnScreen(im, region=windowSize, confidence=0.9)
+	# initialize the static variables 
+	@staticmethod
+	def initialize():
+		top_windows = []
+		win32gui.EnumWindows(WindowProperty.windowEnumHandler, top_windows)
+		for i in top_windows:
+			if "league of legend" in i[1].lower():
+				DLOG('find window: {}'.format(i[1].lower()))
+				WindowProperty.hwnd = i[0]
+				r = win32gui.GetWindowRect(i[0])
+				WindowProperty.rect = (r[0], r[1], r[2] - r[0], r[3] - r[1])
+				break
+# end of class WindowProperty
+
+# a class to store y-axis value
+class Coordinate:
+	teamY = [ 130, 165, 200, 235 ]
+	enemyY = [ 310, 345, 380, 415, 450 ]
+# end of class Coordinate
+
+# end of Class definitions.
+###########################################################
+
+# write log to log file
+def DLOG(msg):
+	file = open('debuglog.log', 'a')
+	file.write(time.strftime('%Y-%m-%d %H:%M:%S -\t', time.localtime()))
+	file.write(msg + '\n')
+	file.close()
+# end of log()
+
+# find league icon within a region, and return the position.
+def findLeagueIcon(leaguRegion):
+	for im in Images.leagueIm:
+		icon = pyautogui.locateCenterOnScreen(im, region=leaguRegion, confidence=0.9)
 		if icon:
-			debuglog.write('find aram\n')
+			#DLOG('[findLeagueIcon] find league icon on window')
 			break
 	return icon
+# end of findLeagueIcon()
 
-# tkinter initialize  
-window = tkinter.Tk()
-window.title('水水牌檢舉器')
-window.configure(background='white')
-window.iconbitmap(cwd + "/image/rsc/window_icon.ico")
-window.geometry("+1600+700")
-
-top_frame = ttk.Frame(window)
-top_frame.pack()
-bottom_frame = ttk.Frame(window)
-bottom_frame.pack(side=tkinter.BOTTOM)
-# end of tkinter initialize
+# get a list of random numbers 
+def myRandom():
+	seed(time.time())
+	randomNumbers = []
+	for i in range(0,3):
+		rn = randint(0,6)
+		while rn in randomNumbers:
+			rn = randint(0,6)
+		randomNumbers.append(rn)
+	return randomNumbers
+# end of myRandom()
 
+###########################################################
 # Button functions
 def reportTeam():
-	PreloadImage.bringFront(PreloadImage.windowHndlr)
-	AramIcon = findLeagueIcon(PreloadImage.windowSize)
-	ys = teamY
+	WindowProperty.bringFront(WindowProperty.hwnd)
+	leagueIcon = findLeagueIcon(WindowProperty.rect)
 
-	if AramIcon:
-		for y in ys:
-			reportAPlayer(AramIcon.x, AramIcon.y + y)
+	DLOG('reportTeam() >>>')
+	if leagueIcon:
+		for y in Coordinate.teamY:
+			reportAPlayer(leagueIcon.x, leagueIcon.y + y)
 	else:
-		debuglog.write('aram not found\n')
+		DLOG('[reportTeam] League icon is not found')
+	DLOG('reportTeam() <<<')
 
 def reportEnemy():
-	PreloadImage.bringFront(PreloadImage.windowHndlr)
-	AramIcon = findLeagueIcon(PreloadImage.windowSize)
-	ys = enemyY
+	WindowProperty.bringFront(WindowProperty.hwnd)
+	leaguIcon = findLeagueIcon(WindowProperty.rect)
 
-	if AramIcon:
-		for y in ys:
-			reportAPlayer(AramIcon.x, AramIcon.y + y)
+	DLOG('reportEnemy() >>>')
+	if leaguIcon:
+		for y in Coordinate.enemyY:
+			reportAPlayer(leaguIcon.x, leaguIcon.y + y)
 	else:
-		debuglog.write('aram not found\n')
+		DLOG('[reportEnemy] League icon is not found')
+	DLOG('reportEnemy() <<<')
 
 def reportAll():
-	PreloadImage.bringFront(PreloadImage.windowHndlr)
-	AramIcon = findLeagueIcon(PreloadImage.windowSize)
-	ys = teamY + enemyY
+	WindowProperty.bringFront(WindowProperty.hwnd)
+	leaguIcon = findLeagueIcon(WindowProperty.rect)
+
+	DLOG('reportAll() >>>')
+	ys = Coordinate.teamY + Coordinate.enemyY
 
-	if AramIcon:
+	if leaguIcon:
 		for y in ys:
-			reportAPlayer(AramIcon.x, AramIcon.y + y)
+			reportAPlayer(leaguIcon.x, leaguIcon.y + y)
 	else:
-		debuglog.write('aram not found\n')
+		DLOG('[reportAll] League icon is not found')
+	DLOG('reportAll() <<<')
 
 def closeWindow():
 	window.destroy()
+# end of button functions
+###########################################################
+
+def reportAPlayer(posX, posY):
+	pyautogui.moveTo(posX, posY)
+		
+	for im in Images.reportButtonIm:
+		reportButton = pyautogui.locateCenterOnScreen(im, region=(posX, posY - 20, 300, 100), confidence=0.8, grayscale=True)
+		if reportButton:
+			break
+	
+	if reportButton:
+		#pyautogui.moveTo(reportButton)
+		pyautogui.mouseDown(reportButton,button='left',duration=1.0)
+		pyautogui.mouseUp(reportButton,button='left')
+
+		#locate report check boxes
+		checkboxes = list(pyautogui.locateAllOnScreen(Images.checkboxIm, region=WindowProperty.rect, confidence=0.7))
+		
+		if checkboxes:
+			# get random numbers
+			rn = myRandom()
+
+			# click check boxes
+			for i in rn:
+				pyautogui.click(checkboxes[i])
+		
+			# paste report text to comment text field
+			commentTextField = pyautogui.locateCenterOnScreen(Images.commentTextIm, region=WindowProperty.rect)
+			if commentTextField:
+				pyautogui.click(commentTextField)
+				pyperclip.copy(Images.reportText)
+				pyautogui.hotkey('ctrl','v')
+
+			# cancel report for testing
+			#cancel = pyautogui.locateCenterOnScreen(Images.cancelIm, region=WindowProperty.rect)
+			#if cancel:
+			#	pyautogui.click(cancel)
+			#	return
+
+			# press report confirm button
+			reportConfirm = pyautogui.locateCenterOnScreen(Images.reportConfirmIm, region=WindowProperty.rect)
+			if reportConfirm:
+				pyautogui.moveTo(reportConfirm)
+				pyautogui.click(reportConfirm)
+		else:
+			DLOG('[reportAPlater] checkbox is not detected')
+			# cancel report and go on.
+			cancel = pyautogui.locateCenterOnScreen(Images.cancelIm, region=WindowProperty.rect)
+			if cancel:
+				pyautogui.click(cancel)
+				return
+	else:
+		DLOG('[reportAPlayer]report fail')
+
+
+###########################################################
+# main script starts:
+
+# get the current working directory
+cwd = os.path.dirname(sys.argv[0]) if os.path.dirname(sys.argv[0]) != "" else "."
+
+# tkinter initialize  
+window = tkinter.Tk()
+window.title('水水牌檢舉器')
+window.configure(background='white')
+window.iconbitmap(cwd + "/image/rsc/window_icon.ico")
+window.geometry("+1600+700")
+
+top_frame = ttk.Frame(window)
+top_frame.pack()
+bottom_frame = ttk.Frame(window)
+bottom_frame.pack(side=tkinter.BOTTOM)
+# end of tkinter initialize
 
 # top frame
 left_style = ttk.Style()
@@ -142,70 +258,11 @@ def closeWindow():
 bottom_button = ttk.Button(text='Exit', style='B4.TButton', command = closeWindow)
 bottom_button.pack(side=tkinter.BOTTOM)
 
-
-def myRandom():
-	seed(time.time())
-	randomNumbers = []
-	for i in range(0,3):
-		rn = randint(0,6)
-		while rn in randomNumbers:
-			rn = randint(0,6)
-		randomNumbers.append(rn)
-	return randomNumbers
-
-
-
-def reportAPlayer(posX, posY):
-	pyautogui.moveTo(posX, posY)
-		
-	for im in PreloadImage.reportButtonIms:
-		reportButton = pyautogui.locateCenterOnScreen(im, region=(posX, posY - 20, 300, 100), confidence=0.8, grayscale=True)
-		if reportButton:
-			break
-	
-	if reportButton:
-		#pyautogui.moveTo(reportButton)
-		pyautogui.mouseDown(reportButton,button='left',duration=1.0)
-		pyautogui.mouseUp(reportButton,button='left')
-
-		#locate report check boxes
-		checkboxes = list(pyautogui.locateAllOnScreen(PreloadImage.checkboxIm, region=PreloadImage.windowSize, confidence=0.7))
-		
-		#TODO optimize here 
-		if checkboxes:
-			pass
-		else:
-			return
-		# get random numbers
-		rn = myRandom()
-
-		# click check boxes
-		for i in rn:
-			pyautogui.click(checkboxes[i])
-
-		commentTextField = pyautogui.locateCenterOnScreen(PreloadImage.commentTextIm, region=PreloadImage.windowSize)
-		if commentTextField:
-			pyautogui.click(commentTextField)
-			pyperclip.copy(PreloadImage.reportText)
-			pyautogui.hotkey('ctrl','v')
-
-		# cancel report for testing
-		#cancel = pyautogui.locateCenterOnScreen(PreloadImage.cancelIm, region=PreloadImage.windowSize)
-		#if cancel:
-		#	pyautogui.click(cancel)
-
-		reportConfirm = pyautogui.locateCenterOnScreen(PreloadImage.reportComfirmIm, region=PreloadImage.windowSize)
-		if reportConfirm:
-			pyautogui.moveTo(reportConfirm)
-			pyautogui.click(reportConfirm)
-	else:
-		debuglog.write('report fail\n')
-		
-		
-#################################################
-# main script: 
+# class initialization
+Images().initialize(cwd)
+WindowProperty().initialize()
 
 window.mainloop()
-debuglog.close()
 
-#################################################
+# main script ends.
+###########################################################
\ No newline at end of file
diff --git a/RunReportTool.exe b/RunReportTool.exe
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diff --git a/src/RunReportTool/.vs/RunReportTool/v15/ipch/fc2602cf41f49b29.ipch b/src/RunReportTool/.vs/RunReportTool/v15/ipch/fc2602cf41f49b29.ipch
deleted file mode 100644
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diff --git a/src/RunReportTool/RunReportTool/RunReportTool.cpp b/src/RunReportTool/RunReportTool/RunReportTool.cpp
index be5c702..48a0460 100644
--- a/src/RunReportTool/RunReportTool/RunReportTool.cpp
+++ b/src/RunReportTool/RunReportTool/RunReportTool.cpp
@@ -12,10 +12,12 @@ namespace fs = filesystem;
 int main(int argc, const char * argv[])
 {
 	fs::path currPath = fs::current_path();
-	string strCmd = "start /b pythonw ";
+	wstring wstrCmd = L"start /b pythonw ";
 
-	strCmd += currPath.u8string();
-	strCmd += "\\League.py";
+	wstrCmd += currPath.wstring();
+	wstrCmd += L"\\League.py";
 
-	system( strCmd.c_str() );
+	_wsystem( wstrCmd.c_str() );
+
+	return 0;
 }
diff --git a/src/RunReportTool/RunReportTool/RunReportTool.vcxproj.user b/src/RunReportTool/RunReportTool/RunReportTool.vcxproj.user
deleted file mode 100644
index be25078..0000000
--- a/src/RunReportTool/RunReportTool/RunReportTool.vcxproj.user
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup />
-</Project>
\ No newline at end of file