GO: Fixed warning: go env -w GOPATH=... does not override conflicting OS environment variable

Because the GOPATH is OS level setting variable so it can't be set using go env -v cmd.

We need to use OS specify way to modify this PATH variable.

1. Using CMD to set GOPATH variable (Environment: WIN10)

    > setx GOPATH ##YOURPATH##

2. Check the GOPATH been setup 

   > go env 

Reference 

     1. go 1.13 go env -w 設置GOPROXY報錯

     2. GO/env_write.txt

     3.https://github.com/golang/go/wiki/SettingGOPATH#windows-10-gui

GO: Development a simple windows GUI use lxn-walk package(2) -- Combobox and Button

1.Create the project folder and win_gui_v1.go in your go work space
   > cd ..\src\
   > mkdir win_gui_v1
2.Copy the .manifest file and modify to your_execution.exe.manifest
 

3.Code
3.Result

 











Ref:
      1. Go实战--使用golang开发Windows Gui桌面程序(lxn/walk)
      2. ComboBox 類別
      3. lxn/walk/examples

GO: Development a simple windows GUI use lxn-walk package(1) -- Getting start

"Walk is a "Windows Application Library Kit" for the Go Programming Language.
Its primarily useful for Desktop GUI development".  In this series I try to build a simple terminal program to commnunicate via COM port.

1. Getting start
    >   go get github.com/lxn/walk

2. Build the example
     >   cd ..\src\github.com\lxn\walk\examples\imageviewer
     >   go build

3. run the imageviewer.exe

  

    

Ref:

    1.  lxn/walk

GO : List all the serial port in windows use golang-sys package

We can easily get all the serial port in windows using regedit.exe

In our application we read the windows register key `HARDWARE\\DEVICEMAP\\SERIALCOMM` through windows API and list all the sub key and value.

Github project: win_serial_console

Ref:
    1. getting-started-with-golang
    2. golang-sys package
    3. Why does the RegQueryValueEx() function return ERROR_FILE_NOT_FOUND while trying 
    4. 搜尋電腦上所有的 RS232 Ports
    5. Enumerating Registry Values in Go (Golang).
    6. System Error Codes (0-499)