Printing output to a command window when golang application is compiled with -ldflags -H=windowsgui

Question

I have an application that usually runs silent in the background, so I compile it with

go build -ldflags -H=windowsgui 

To check

Answer 1

You can get the desired behavior without using -H=windowsgui; you'd basically create a standard app (with its own console window), and hide it until the program exits.

func Console(show bool) {
    var getWin = syscall.NewLazyDLL("kernel32.dll").NewProc("GetConsoleWindow")
    var showWin = syscall.NewLazyDLL("user32.dll").NewProc("ShowWindow")
    hwnd, _, _ := getWin.Call()
    if hwnd == 0 {
            return
    }
    if show {
       var SW_RESTORE uintptr = 9
       showWin.Call(hwnd, SW_RESTORE)
    } else {
       var SW_HIDE uintptr = 0
       showWin.Call(hwnd, SW_HIDE)
    }
}

And then use it like this:

func main() {
    Console(false)
    defer Console(true)
    ...
    fmt.Println("Hello World")
    ...
}