Add a guest account in windows 10

1. Go to settings
2. Account
3. Family & other users
4. Under other users… “Add someone else to this PC”
5. Select “I don’t have this person’s sign-in information”
6. At the bottom of the next box, select “Add a user without a Microsoft account”
7. Type in a new username and password(optional), and you should now have a new user account under “other users” (ใช้ชื่ออื่นแทน guest เช่น visitor) .

Ref: How I can add a guest account in windows 10


Windows – Alt Key Numeric Codes

การใช้งาน กด Alt พร้อมด้วยรหัสแอสกีในเลขฐาน 10 แบบสี่หลัก เช่น A ก็ Alt 0065
(รึไม่ก็ใช้ Character Map เลย)

Currency Symbols

Windows Alt Code for Currency Symbols

0162	¢	Cent sign
0163	£	British Pound
0128	€	Euro currency
0165	¥	Japanese Yen
0131	ƒ	Dutch Florin
0164	¤	Generic currency symbol


These codes produce fractions which are spaced on one line.

Windows Alt Codes – Fractions

0188	¼	Fraction 1/4
0189	½	Fraction 1/2
0190	¾	Fraction 3/4

Other Punctuation

These incude copyright symbols and special section marks.

Windows Alt Codes for Punctuation

0126	~	
0169	©	Copyright symbol
0174	®	Registered symbol
0153	™	Trademark
0149	•	List Dot
0150	–	en-dash
0151	—	em-dash
0182	¶	Paragraph Symbol (Pilcrow) – Windows – Alt Key Numeric Codes – Character Map Utility

Windows 10: Access the UEFI BIOS

  1. Click the Start Start menu and select Settings.
  2. Select Update and Security.
  3. Click Recovery.
  4. Under Advanced startup, click Restart now. The system will restart and show the Windows 10 boot menu.
  5. Select Troubleshoot.
  6. Choose Advanced options.
  7. Select UEFI Firmware Settings.
  8. Click Restart to restart the system and enter UEFI (BIOS).

การสร้าง Web Services และเรียกใช้งาน Web Services ด้วย Visual Studio 2015

สร้าง 2 โปรเจ็กส์

โปรเจ็กส์ 1: สร้างโปรเจ็กส์ให้บริการเว็บเซอร์วิส มีเว็บเมธอดให้บริการ 2 เมธอด

  • มีเว็บเมธอด HelloWorld() คืนค่าเป็นสตริง Hello World
  • มีเว็บเมธอด ConvertTemperature() รับพารามิเตอร์เป็นองศาฟาเรนไฮ และคืนค่าเป็นองศาเซลเซียส
  • สามารถเรียกดู WSDL ได้ด้วยการใส่ ?wsdl ต่อท้าย เช่น  xxx.asmx?wsdl

โปรเจ็กส์ 2: สร้างโปรเจ็กส์วินโดว์เดสท็อป เรียกใช้งานเว็บเซอร์วิส

  • เรียกใช้งานเว็บเมธอด ConvertTemperature()

Visual Studio 2017

ถ้าใช้ Visual Studio 2017 ให้เพิ่ม Tag ต่อไปนีั้ที่  web.config

        <add name="HttpGet"/>
        <add name="HttpPost"/>

Ref – Request format is unrecognized for URL unexpectedly ending in

How to create a bootable ubuntu USB stick?

Source :


About ubuntu

According to “Wikipedia” : “Ubuntu is an operating system based on the Linux kernel and the Linux distribution Debian, with Unity as its default desktop environment. It is distributed as free and open source software. It is named after the Southern African philosophy of ubuntu, which often is translated as “humanity towards others” or “the belief in a universal bond of sharing that connects all humanity”.
According to 2012 online surveys, Ubuntu is the most popular Linux distribution on desktop and laptop personal computers, and most Ubuntu coverage focuses on its use in that market. However, it is also popular on servers and for cloud computing.
Development of Ubuntu is led by Canonical Ltd., a company based in the Isle of Man and owned by South African entrepreneur Mark Shuttleworth. Canonical generates revenue through the sale of technical support and services related to Ubuntu. According to Canonical, the Ubuntu project is committed to the principles of open source development; people are encouraged to use free software, study how it works, improve upon it, and distribute it”.

Here we will learn How to create a bootable ubuntu USB stick on “WINDOWS” , “OS X” and “UBUNTU”




To run Ubuntu from a USB stick, the first thing you need to do is insert a USB stick with at least 2GB of free space into your PC.

The easiest way to put Ubuntu onto your stick is to use the USB installer provided at You’ll need to download and install and follow the instructions.


Select Ubuntu Desktop Edition from the drop down list.












Click ‘Browse’ and open the downloaded ISO file.

















Choose the USB drive and click ‘Create’.















To create a USB stick from which you can install Ubuntu, you must first download Ubuntu. Then, follow these instructions:



Insert a USB stick with at least 2GB of free space.


Open the dash and search for Startup Disk Creator.


Select the Startup Disk Creator to launch the app.








Click ‘Other’ to choose the downloaded ISO file.






Select the file and click ‘Open’.











Select the USB stick in the bottom box and click ‘Make Startup Disk’.











That’s it! When the process completes, you’ll be ready to restart your computer and begin installing Ubuntu.



We would encourage Mac users to download Ubuntu Desktop Edition by burning a CD. But if you prefer to use a USB stick, please follow the instructions below.

Note: this procedure requires that you create an .img file from the .iso file you download. It will also change the filesystem that is on the USB stick to make it bootable, so backup all data before continuing.


Download Ubuntu Desktop


Open the Terminal (in /Applications/Utilities/ or query Terminal in Spotlight).


Convert the .iso file to .img using the convert option of hdiutil (e.g.,hdiutil convert -format UDRW -o ~/path/to/target.img ~/path/to/ubuntu.iso)

Note: OS X tends to put the .dmg ending on the output file automatically.


Run diskutil list to get the current list of devices.


Insert your flash media.


Run diskutil list again and determine the device node assigned to your flash media (e.g. /dev/disk2).


Run diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command; in the previous example, N would be 2).


Execute sudo dd if=/path/to/downloaded.img of=/dev/rdiskN bs=1m (replace /path/to/downloaded.img with the path where the image file is located; for example, ./ubuntu.imgor ./ubuntu.dmg).

  • Using /dev/rdisk instead of /dev/disk may be faster
  • If you see the error dd: Invalid number ’1m’, you are using GNU dd. Use the same command but replace bs=1m with bs=1M
  • If you see the error dd: /dev/diskN: Resource busy, make sure the disk is not in use. Start the ‘Disk’ and unmount (don’t eject) the drive


Run diskutil eject /dev/diskN and remove your flash media when the command completes.


Restart your Mac and press alt/option key while the Mac is restarting to choose the USB stick.

How to Create ISO from Mac Installation DVD – Rip Mac DVD in Windows

Several methods showed in this blog to install Mac OS X on Windows OS with Desktop Virtualization, original Mac installation DVD does not work sometimes with these methods. You must create ISO file from installation disk and use. This post shows how to create ISO from Mac Installation DVD in Windows.

I tried my favorite DVD writing software to Rip Mac DVD to ISO in Windows, but those images did not work with VMware or VirtualBox. Finally, Imgburn did the job and it worked well.


Follow these steps to rip Mac DVD in Windows

1) Get the Snow Leopard DVD here and Download and install Imgburn burning software. ( Free version, registration not required)

2) Start program and select image file from disk option. Do not close log screen down, better keep it.

3) Next screen will detect the DVD information and output file location. Make sure to select correct source destination. Its better to reduce data reading speed to 1x ( I know it will be slow) for this conversion. Then start.

Create ISO from Mac Installation DVD

4) Progress bar will show the status. I’m sure it will end without any errors if the physical drive and disk have no damages.