切换到alt-tab等活动应用程序
-
13-11-2019 - |
题
好的,我在通过名称找到窗口等找到了许多帖子。我未找到的是如何查找和将窗口应用程序焦点切换为上一个活动窗口。我上面显示的代码将为我提供活动的任务管理器中的活动应用程序列表。
我无法弄清楚如何做的是弄清楚哪个应用程序是最后一个活动应用程序,然后切换到它。例如...
我有我的自定义Winform应用程序打开。
我点击一个按钮
我的应用程序切换到最后一个活动窗口/应用程序。
这是我到目前为止的工作代码。(这是一个按钮上的动作,它希望应用程序有一个名为textbox1的文本框。您还需要使用system.diagnostics添加;
private void button1_Click(object sender, EventArgs e)
{
Process[] procs = Process.GetProcesses();
IntPtr hWnd;
foreach (Process proc in procs)
{
if ((hWnd = proc.MainWindowHandle) != IntPtr.Zero)
{
textBox1.Text += (proc.ProcessName.ToString());
textBox1.Text += "\t";
textBox1.Text += (hWnd.ToString());
textBox1.Text += "\r\n";
}
}
}
. 解决方案
因为我的评论没有帮助你,这是一个小的简历(但没有测试它):
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool IsWindowVisible(IntPtr hWnd);
[DllImport("user32.dll")]
static extern IntPtr GetLastActivePopup(IntPtr hWnd);
[DllImport("user32.dll", ExactSpelling = true)]
static extern IntPtr GetForegroundWindow();
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool SetForegroundWindow(IntPtr hWnd);
const uint GA_PARENT = 1;
const uint GA_ROOT = 2;
const uint GA_ROOTOWNER = 3;
public IntPtr GetPreviousWindow()
{
IntPtr activeAppWindow = GetForegroundWindow();
if ( activeAppWindow == IntPtr.Zero )
return IntPtr.Zero;
IntPtr prevAppWindow = GetLastActivePopup(activeAppWindow);
return IsWindowVisible(prevAppWindow) ? prevAppWindow : IntPtr.Zero;
}
public void FocusToPreviousWindow()
{
IntPtr prevWindow = GetPreviousWindow();
if ( prevWindow != IntPtr.Zero )
SetForegroundWindow(prevWindow);
}
. 其他提示
检查本文: http://www.whatebybete.info/programming/how-to-get-main-window-handle-of-the-last-vite-window 特别是,此代码:
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr GetWindow(IntPtr hWnd, uint uCmd);
enum GetWindow_Cmd : uint
{
GW_HWNDFIRST = 0,
GW_HWNDLAST = 1,
GW_HWNDNEXT = 2,
GW_HWNDPREV = 3,
GW_OWNER = 4,
GW_CHILD = 5,
GW_ENABLEDPOPUP = 6
}
[DllImport("user32.dll", ExactSpelling = true, CharSet = CharSet.Auto)]
public static extern IntPtr GetParent(IntPtr hWnd);
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool SetForegroundWindow(IntPtr hWnd);
[...]
IntPtr targetHwnd = GetWindow(Process.GetCurrentProcess().MainWindowHandle, (uint)GetWindow_Cmd.GW_HWNDNEXT);
while (true)
{
IntPtr temp = GetParent(targetHwnd);
if (temp.Equals(IntPtr.Zero)) break;
targetHwnd = temp;
}
SetForegroundWindow(targetHwnd);
. 不隶属于 StackOverflow