golang hide window

In program development, hiding windows is a relatively common operation. In some cases, we need to let the program run silently in the background without disturbing the user. Golang is an emerging programming language with good concurrency and performance. So how to implement hidden windows in golang? This article will give you a detailed introduction.

First of all, we need to clarify what a window is. In computer operating systems, a window refers to an area occupied by a program on the interface. In the Windows operating system, there are many types of windows, such as ordinary windows, modal dialog boxes, etc. Normally, we need to use system-level API to hide the window.

In golang, we can hide the window by calling cgo to call the relevant Windows system-level API. The specific steps are as follows:

Step1 Define the Windows API function

In the process of hiding the window, we need to call the ShowWindow function in the Windows API. The ShowWindow function is a simple window display control function that can set the window to hidden, minimized, maximized and other states.

Therefore, in golang, we need to define this function. The specific code is as follows:

type HANDLE uintptr
type HWND HANDLE

const SW_HIDE = 0

func ShowWindow(hwnd HWND, nCmdShow int32) bool {
    _ = showWindow.Call(uintptr(hwnd), uintptr(nCmdShow))
    return true
}

var (
    user32      = syscall.MustLoadDLL("user32.dll")
    showWindow  = user32.MustFindProc("ShowWindow")
)

In the above code, we first define the two types HANDLE and HWND. HANDLE is a reference to the object, and HWND is the handle type of the window. Then, we defined the ShowWindow function, which returns a bool type value indicating whether the operation was successful. The specific implementation process is achieved by calling the showWindow.Call function. Finally, we use the syscall.MustLoadDLL function to load the user32.dll library and the MustFindProc function to find the ShowWindow function.

Step2 Hidden window

After defining the relevant functions, the next step is to implement the operation of hiding the window. The specific code is as follows:

func HideWindow() bool {
    hWnd := GetConsoleWindow()
    if hWnd == 0 {
        return false
    }
    ShowWindow(hWnd, SW_HIDE)
    return true
}

func GetConsoleWindow() uintptr {
    h := syscall.MustLoadDLL("kernel32.dll")
    p := h.MustFindProc("GetConsoleWindow")
    ret, _, _ := p.Call()
    return ret
}

In the above code, we call the GetConsoleWindow function in the HideWindow function to obtain the handle of the console window. If the acquisition fails, false is returned. If the acquisition is successful, the ShowWindow function is called to hide the window. Finally, the operation result is returned.

In the code implementation of this article, we used the two Windows system-level API libraries kernel32.dll and user32.dll. At the same time, we also checked the return result of obtaining the window handle to ensure the correctness and robustness of the program.

Summary

This article introduces the method of using golang to implement window hiding, which is achieved by calling Windows API library functions. Specific steps include defining Windows API functions and implementing the operation of hiding windows. Golang's concurrency performance is excellent. In some scenarios that require window hiding functions, using golang is a very suitable choice.

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