最大化另一个正在运行的程序的窗口 [英] Maximize window of another running program

问题描述

如何以编程方式最大化我当前在PC上运行的程序。例如，如果我在任务管理器中运行 WINWORD.exe 。如何最大化它？

How do I programmatically maximize a program that I have currently running on my pc. For example if I have WINWORD.exe running in task manager. How do I maximize it?

在我的代码中，我尝试过：

In my code I have tried:

private void button1_Click(object sender, EventArgs e)
{
    this.WindowState = FormWindowState.Maximised;
}

很遗憾，仅显示我的申请。我希望它最大化另一个exe，但如果找不到它，那么我要退出它。

Unfortunately that only displays my application. I would like it to maximise another exe, BUT if it cannot find it then i want to it to exit.

推荐答案

使用ShowWindow

您可以使用 ShowWindow 方法。为此，您首先需要找到窗口句柄，然后使用该方法。然后以这种方式最大化窗口：

You can set windows state using ShowWindow method. To do so, you first need to find the window handle and then using the method. Then maximize the window this way:

private const int SW_MAXIMIZE = 3;
[System.Runtime.InteropServices.DllImport("user32.dll")]
private static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
private void button1_Click(object sender, EventArgs e)
{
    var p = System.Diagnostics.Process.GetProcessesByName("WINWORD").FirstOrDefault();
    if(p!=null)
    {
        ShowWindow(p.MainWindowHandle, SW_MAXIMIZE);
    }
}

使用WindowPattern.SetWindowVisualState

作为另一个选项（基于汉斯的评论），您可以使用 SetWindowVisualState 设置窗口状态的方法。为此，请首先添加对 UIAutomationClient.dll 和 UIAutomationTypes.dll 的引用，然后添加使用System.Windows.Automation; 并以这种方式最大化窗口：

Also as another option (based on Hans's comment), you can use SetWindowVisualState method to set state of a window. To so so, first add a reference to UIAutomationClient.dll and UIAutomationTypes.dll then add using System.Windows.Automation; and maximize the window this way:

var p = System.Diagnostics.Process.GetProcessesByName("WINWORD").FirstOrDefault();
if (p != null)
{
    var element = AutomationElement.FromHandle(p.MainWindowHandle);
    if (element != null)
    {
        var pattern = element.GetCurrentPattern(WindowPattern.Pattern) as WindowPattern;
        if (pattern != null)
            pattern.SetWindowVisualState(WindowVisualState.Maximized);
    }
}

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