在if语句中使用GetForegroundWindow结果来检查用户的当前窗口

Question

我需要检查用户当前选择的窗口,并且如果他们选择了特定程序则执行操作.

我之前没有使用过GetForegroundWindow函数,也找不到有关如何以这种方式使用它的任何信息.

我只需要比较当前窗口,看看它是否是一个特定的程序.但是,GetForegroundWindow函数似乎不会返回字符串或int.所以主要是我不知道如何找出我要比较的程序窗口的值.

我目前有代码来获取当前窗口:

    [DllImport("user32.dll")]
    private static extern IntPtr GetForegroundWindow();

    IntPtr selectedWindow = GetForegroundWindow();

我需要能够如下理想地应用它:

    If (selectedWindow!="SpecificProgram")
    {
        <Do this stuff>
    } 

我希望GetForegroundWindow值/对象对每个程序都是唯一的,并且不会以某种方式运行,每个特定的程序/窗口每次都有不同的值.

我也将此作为Windows窗体的一部分,但我怀疑它很重要.

-谢谢你的帮助

编辑:这种方式有效,并使用当前窗口的图块,这使得它非常适合检查窗口是否正确:

        [DllImport("user32.dll")]
        static extern IntPtr GetForegroundWindow();
        [DllImport("user32.dll")]
        static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);

        private string GetActiveWindowTitle()
        {
            const int nChars = 256;
            StringBuilder Buff = new StringBuilder(nChars);
            IntPtr handle = GetForegroundWindow();

            if (GetWindowText(handle, Buff, nChars) > 0)
            {
                return Buff.ToString();
            }
            return null;
        }

然后我可以这样做:

        if (GetActiveWindowTitle()=="Name of Window")
        {
            DoStuff.jpg 
        }

Answer 1

它有一些代码，但它有效：

    #region Retrieve list of windows

    [DllImport("user32")]
    private static extern int GetWindowLongA(IntPtr hWnd, int index);

    [DllImport("USER32.DLL")]
    private static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

    [DllImport("USER32.DLL")]
    private static extern bool EnumWindows(EnumWindowsProc enumFunc, int lParam);

    [DllImport("user32.dll")]
    private static extern IntPtr GetForegroundWindow();

    private const int GWL_STYLE = -16;

    private const ulong WS_VISIBLE = 0x10000000L;
    private const ulong WS_BORDER = 0x00800000L;
    private const ulong TARGETWINDOW = WS_BORDER | WS_VISIBLE;

    internal class Window
    {
        public string Title;
        public IntPtr Handle;

        public override string ToString()
        {
            return Title;
        }
    }

    private List<Window> windows;

    private void GetWindows()
    {
        windows = new List<Window>();
        EnumWindows(Callback, 0);
    }

    private bool Callback(IntPtr hwnd, int lParam)
    {
        if (this.Handle != hwnd && (GetWindowLongA(hwnd, GWL_STYLE) & TARGETWINDOW) == TARGETWINDOW)
        {
            StringBuilder sb = new StringBuilder(100);
            GetWindowText(hwnd, sb, sb.Capacity);

            Window t = new Window();
            t.Handle = hwnd;
            t.Title = sb.ToString();
            windows.Add(t);
        }

        return true; //continue enumeration
    }

    #endregion

并检查用户窗口：

    IntPtr selectedWindow = GetForegroundWindow();
    GetWindows();

    for (i = 0; i < windows.Count; i++)
    {
        if(selectedWindow == windows[i].Handle && windows[i].Title == "Program Title X")
        {
             //Do stuff

             break;
        }
     }

瓦尔特