是否可以将一个表单放在另一个表单之上，而不是在TopMost之上? [英] Is it possible to keep a Form on top of another, but not TopMost?

问题描述

我想做的事情很简单:将WinForm放在另一个之上，而不是最顶层.就像，当我单击一个窗口时，我的winform会在它的顶部，但是当我单击其他东西(例如浏览器)时，我的窗体将不在它的顶部.

What I'm trying to do is simple: make my WinForm on top of another, but not topmost. Like, when I click on a window, my winform will be on top of it, but when I click on something else, like a browser, my form will not be on top of it.

类似于TopMost WinForm，但仅适用于特定过程.(我正在为游戏制作叠加层，所以我需要它在游戏中位于最高位置.)

Like a TopMost WinForm, but only for a specific process. (Im making a overlay for a game, so I need it to be topmost ONLY on the game.)

有帮助的图片(红色边框内的所有内容都是我的形式):

Pictures to help (Everything inside the RED border is my form):

然后，当我切换到另一个窗口(在本例中为Explorer)时，我希望表单位于背景中，就像《英雄联盟》客户端

And then when I change to another window (In this case, Explorer) I want my form to be in the background, just like the League of Legends client

推荐答案

所拥有的表单始终显示在其所有者表单的顶部.要使表单归所有者所有，可以将所有者表单的引用分配给

Owned forms are always displayed on top of their owner form. To make a form owned by an owner, you can assign a reference of the owner form to Onwer property of the owned form, for example:

var f = new Form();
f.Owner = this;
f.Show();

将另一个进程的窗口设置为所有者

为此，您应该首先找到另一个进程的窗口句柄，然后使用

To do so, you should first find the handle of window of the other process, then using SetWindowLong API function, you can set it as owner of your form, for example:

//using System.Runtime.InteropServices;
//using System.Diagnostics;

[DllImport("user32.dll", EntryPoint = "SetWindowLong", CharSet = CharSet.Auto)]
public static extern IntPtr SetWindowLong(IntPtr hWnd, int nIndex, IntPtr dwNewLong);
private void button1_Click(object sender, EventArgs e)
{
    var notepad = Process.GetProcessesByName("notepad").FirstOrDefault();
    if(notepad!=null)
    {
        var owner = notepad.MainWindowHandle;
        var owned = this.Handle;
        var i = SetWindowLong(owned, -8 /*GWL_HWNDPARENT*/, owner);
    }
}

在上面的示例中，您的表单将始终位于记事本窗口的顶部.

In above example, your form will be always on top of the notepad window.

这篇关于是否可以将一个表单放在另一个表单之上，而不是在TopMost之上?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！