C＃显示隐藏的窗口 [英] C# show hidden window

问题描述

我正在开发一个用于Excel加载英寸在某些时候，我可以接收异步事件。我需要能够显示，如果隐藏在这些事件的Excel窗口。

我能够存储 HWND 属性，我相信一定是一个不变的INT /参考，以确定我的Excel窗口。

有人能解释一下HWND？ ？在此先人，并解释我如何使用它表明从C＃隐藏的窗口

感谢;）

更新：不久，那是一段代码，整理我的问题：

  ///<总结>不同的枚举使用
 ///的ShowWindow<显示窗口的方式; /总结> 
私人枚举WindowShowStyle：UINT 
 {
 ///<总结>隐藏窗口并激活另一个窗口< /总结> 
 ///<&言论GT;看到SW_HIDE< /言论> 
隐藏= 0，
 ///<总结>激活并显示一个窗口。如果窗口最小化
 ///或最大化，系统将它恢复到原来的大小和
 ///位置。显示
 ///窗口在第一次时，应用程序应该指定该标志< /总结> 
 ///<&言论GT;看到SW_SHOWNORMAL< /言论> 
 ShowNormal = 1，
 ///<总结>激活窗口，并将其显示为最小化窗口< /总结> 
 ///<&言论GT;看到SW_SHOWMINIMIZED< /言论> 
 ShowMinimized = 2，
 ///<总结>激活窗口，并将其显示为最大化窗口< /总结> 
 ///<&言论GT;看到SW_SHOWMAXIMIZED< /言论> 
 ShowMaximized = 3，
 ///<总结>最大化指定窗口< /总结> 
 ///<&言论GT;看到SW_MAXIMIZE< /言论> 
最大化= 3，
 ///<总结>显示在其最近的大小和位置的窗口。 
 ///此值是类似ShowNormal，除了窗口不是
 ///活化&下; /总结> 
 ///<&言论GT;看到SW_SHOWNOACTIVATE< /言论> 
 ShowNormalNoActivate = 4，
 ///<总结>激活窗口，并显示在其当前大小
 ///和位置< /总结> 
 ///<&言论GT;看到SW_SHOW< /言论> 
展= 5，
 ///<总结>最小化指定的窗口，并按照Z顺序激活下一个
 ///顶层窗口< /总结> 
 ///<&言论GT;看到SW_MINIMIZE< /言论> 
最小化= 6，
 ///<总结>显示窗口为最小化窗口。这个值是
 ///类似ShowMinimized，但没有被激活的窗口< /总结> 
 ///<&言论GT;看到SW_SHOWMINNOACTIVE< /言论> 
 ShowMinNoActivate = 7，
 ///&所述;总结>显示在其当前大小和位置的窗口。这种
 ///值是类似秀，除了窗户没有被激活< /总结> 
 ///<&言论GT;看到SW_SHOWNA< /言论> 
 ShowNoActivate = 8，
 ///&所述;总结>激活并显示该窗口。如果窗口
 ///最小化或最大化，系统将它恢复到原来的大小
 ///和位置。恢复
 ///时最小化窗口的应用程序应该指定该标志< /总结> 
 ///<&言论GT;看到SW_RESTORE< /言论> 
恢复= 9，
 ///<总结>设置基于
指定的SW_值/// STARTUPINFO结构由$ B $传递给CreateProcess函数显示状态; b ///程序启动应用程序< /总结> 
 ///<&言论GT;看到SW_SHOWDEFAULT< /言论> 
 ShowDefault = 10，
 ///&所述;总结>在Windows 2000 / XP：最小化的窗口，即使线程
 ///拥有窗口挂起。这个标志应该只用于在
 ///来自不同的线程最小化窗口< /总结> 
 ///<&言论GT;看到SW_FORCEMINIMIZE< /言论> 
 ForceMinimized = 11 
} 
 
函数[DllImport（user32.dll中）] 
静态外部布尔的ShowWindow（IntPtr的的HWND，WindowShowStyle的nCmdShow）; 
 
静态无效ContentClick（obj对象，EventArgs的EA）
 {
 Microsoft.Office.Interop.Excel.Application oExcelApp =（Microsoft.Office.Interop.Excel.Application）系统.Runtime.InteropServices.Marshal.GetActiveObject（Excel.Application）; 
 oExcelApp.Visible = TRUE; 
的ShowWindow（（System.IntPtr）Globals.ThisWorkbook.Application.Hwnd，WindowShowStyle.ShowMaximized）; 
} 
  

解决方案

的hWnd 表示窗口句柄。这对窗口实例的标识句柄。

至于显示它，你可以使用的 user32.ShowWindow API。这里的的P / Invoke签名，礼貌 pinvoke.net ：

 函数[DllImport（user32.dll中）] 
静态外部布尔的ShowWindow（IntPtr的的HWND，ShowWindowCommands的nCmdShow）; 
  

和这里的 ShowWindowCommands 枚举：

  ///<总结> /总结>使用
 ///的ShowWindow<显示窗口的不同方式枚举; 
私人枚举WindowShowStyle：UINT 
 {
 ///<总结>隐藏窗口并激活另一个窗口< /总结> 
 ///<&言论GT;看到SW_HIDE< /言论> 
隐藏= 0，
 ///<总结>激活并显示一个窗口。如果窗口最小化
 ///或最大化，系统将它恢复到原来的大小和
 ///位置。显示
 ///窗口在第一次时，应用程序应该指定该标志< /总结> 
 ///<&言论GT;看到SW_SHOWNORMAL< /言论> 
 ShowNormal = 1，
 ///<总结>激活窗口，并将其显示为最小化窗口< /总结> 
 ///<&言论GT;看到SW_SHOWMINIMIZED< /言论> 
 ShowMinimized = 2，
 ///<总结>激活窗口，并将其显示为最大化窗口< /总结> 
 ///<&言论GT;看到SW_SHOWMAXIMIZED< /言论> 
 ShowMaximized = 3，
 ///<总结>最大化指定窗口< /总结> 
 ///<&言论GT;看到SW_MAXIMIZE< /言论> 
最大化= 3，
 ///<总结>显示在其最近的大小和位置的窗口。 
 ///此值是类似ShowNormal，除了窗口不是
 ///活化&下; /总结> 
 ///<&言论GT;看到SW_SHOWNOACTIVATE< /言论> 
 ShowNormalNoActivate = 4，
 ///<总结>激活窗口，并显示在其当前大小
 ///和位置< /总结> 
 ///<&言论GT;看到SW_SHOW< /言论> 
展= 5，
 ///<总结>最小化指定的窗口，并按照Z顺序激活下一个
 ///顶层窗口< /总结> 
 ///<&言论GT;看到SW_MINIMIZE< /言论> 
最小化= 6，
 ///<总结>显示窗口为最小化窗口。这个值是
 ///类似ShowMinimized，但没有被激活的窗口< /总结> 
 ///<&言论GT;看到SW_SHOWMINNOACTIVE< /言论> 
 ShowMinNoActivate = 7，
 ///&所述;总结>显示在其当前大小和位置的窗口。这种
 ///值是类似秀，除了窗户没有被激活< /总结> 
 ///<&言论GT;看到SW_SHOWNA< /言论> 
 ShowNoActivate = 8，
 ///&所述;总结>激活并显示该窗口。如果窗口
 ///最小化或最大化，系统将它恢复到原来的大小
 ///和位置。恢复
 ///时最小化窗口的应用程序应该指定该标志< /总结> 
 ///<&言论GT;看到SW_RESTORE< /言论> 
恢复= 9，
 ///<总结>设置基于
指定的SW_值/// STARTUPINFO结构由$ B $传递给CreateProcess函数显示状态; b ///程序启动应用程序< /总结> 
 ///<&言论GT;看到SW_SHOWDEFAULT< /言论> 
 ShowDefault = 10，
 ///&所述;总结>在Windows 2000 / XP：最小化的窗口，即使线程
 ///拥有窗口挂起。这个标志应该只用于在
 ///来自不同的线程最小化窗口< /总结> 
 ///<&言论GT;看到SW_FORCEMINIMIZE< /言论> 
 ForceMinimized = 11 
} 
  

I am developing an add in for excel. At some point, I can receive async events. I need to be able to show the Excel window if hidden on these events.

I am able to store the Hwnd property, which I believe must be an immutable int/reference to identify my Excel window.

Can someone elaborate on this Hwnd ? and explain how I can show a hidden window from C# using it ?

Thanks in advance folks ;)

UPDATE : shortly, that was the piece of code that sorted my problems :

    /// <summary>Enumeration of the different ways of showing a window using
    /// ShowWindow</summary>
    private enum WindowShowStyle : uint
    {
        /// <summary>Hides the window and activates another window.</summary>
        /// <remarks>See SW_HIDE</remarks>
        Hide = 0,
        /// <summary>Activates and displays a window. If the window is minimized
        /// or maximized, the system restores it to its original size and
        /// position. An application should specify this flag when displaying
        /// the window for the first time.</summary>
        /// <remarks>See SW_SHOWNORMAL</remarks>
        ShowNormal = 1,
        /// <summary>Activates the window and displays it as a minimized window.</summary>
        /// <remarks>See SW_SHOWMINIMIZED</remarks>
        ShowMinimized = 2,
        /// <summary>Activates the window and displays it as a maximized window.</summary>
        /// <remarks>See SW_SHOWMAXIMIZED</remarks>
        ShowMaximized = 3,
        /// <summary>Maximizes the specified window.</summary>
        /// <remarks>See SW_MAXIMIZE</remarks>
        Maximize = 3,
        /// <summary>Displays a window in its most recent size and position.
        /// This value is similar to "ShowNormal", except the window is not
        /// actived.</summary>
        /// <remarks>See SW_SHOWNOACTIVATE</remarks>
        ShowNormalNoActivate = 4,
        /// <summary>Activates the window and displays it in its current size
        /// and position.</summary>
        /// <remarks>See SW_SHOW</remarks>
        Show = 5,
        /// <summary>Minimizes the specified window and activates the next
        /// top-level window in the Z order.</summary>
        /// <remarks>See SW_MINIMIZE</remarks>
        Minimize = 6,
        /// <summary>Displays the window as a minimized window. This value is
        /// similar to "ShowMinimized", except the window is not activated.</summary>
        /// <remarks>See SW_SHOWMINNOACTIVE</remarks>
        ShowMinNoActivate = 7,
        /// <summary>Displays the window in its current size and position. This
        /// value is similar to "Show", except the window is not activated.</summary>
        /// <remarks>See SW_SHOWNA</remarks>
        ShowNoActivate = 8,
        /// <summary>Activates and displays the window. If the window is
        /// minimized or maximized, the system restores it to its original size
        /// and position. An application should specify this flag when restoring
        /// a minimized window.</summary>
        /// <remarks>See SW_RESTORE</remarks>
        Restore = 9,
        /// <summary>Sets the show state based on the SW_ value specified in the
        /// STARTUPINFO structure passed to the CreateProcess function by the
        /// program that started the application.</summary>
        /// <remarks>See SW_SHOWDEFAULT</remarks>
        ShowDefault = 10,
        /// <summary>Windows 2000/XP: Minimizes a window, even if the thread
        /// that owns the window is hung. This flag should only be used when
        /// minimizing windows from a different thread.</summary>
        /// <remarks>See SW_FORCEMINIMIZE</remarks>
        ForceMinimized = 11
    }

    [DllImport("user32.dll")]
    static extern bool ShowWindow(IntPtr hWnd, WindowShowStyle nCmdShow);

    static void ContentClick(object obj, EventArgs ea)
    {
        Microsoft.Office.Interop.Excel.Application oExcelApp = (Microsoft.Office.Interop.Excel.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Excel.Application");
        oExcelApp.Visible = true;
        ShowWindow( (System.IntPtr) Globals.ThisWorkbook.Application.Hwnd, WindowShowStyle.ShowMaximized);
    }

解决方案

hWnd means Window Handle. It's an identifying handle for the window instance.

As for showing it, you could use the user32.ShowWindow API. Here's the P/Invoke signature, courtesy of pinvoke.net:

[DllImport("user32.dll")]
static extern bool ShowWindow(IntPtr hWnd, ShowWindowCommands nCmdShow);

And here's the ShowWindowCommands enum:

/// <summary>Enumeration of the different ways of showing a window using
/// ShowWindow</summary>
private enum WindowShowStyle : uint
{
    /// <summary>Hides the window and activates another window.</summary>
    /// <remarks>See SW_HIDE</remarks>
    Hide = 0,
    /// <summary>Activates and displays a window. If the window is minimized
    /// or maximized, the system restores it to its original size and
    /// position. An application should specify this flag when displaying
    /// the window for the first time.</summary>
    /// <remarks>See SW_SHOWNORMAL</remarks>
    ShowNormal = 1,
    /// <summary>Activates the window and displays it as a minimized window.</summary>
    /// <remarks>See SW_SHOWMINIMIZED</remarks>
    ShowMinimized = 2,
    /// <summary>Activates the window and displays it as a maximized window.</summary>
    /// <remarks>See SW_SHOWMAXIMIZED</remarks>
    ShowMaximized = 3,
    /// <summary>Maximizes the specified window.</summary>
    /// <remarks>See SW_MAXIMIZE</remarks>
    Maximize = 3,
    /// <summary>Displays a window in its most recent size and position.
    /// This value is similar to "ShowNormal", except the window is not
    /// actived.</summary>
    /// <remarks>See SW_SHOWNOACTIVATE</remarks>
    ShowNormalNoActivate = 4,
    /// <summary>Activates the window and displays it in its current size
    /// and position.</summary>
    /// <remarks>See SW_SHOW</remarks>
    Show = 5,
    /// <summary>Minimizes the specified window and activates the next
    /// top-level window in the Z order.</summary>
    /// <remarks>See SW_MINIMIZE</remarks>
    Minimize = 6,
      /// <summary>Displays the window as a minimized window. This value is
      /// similar to "ShowMinimized", except the window is not activated.</summary>
    /// <remarks>See SW_SHOWMINNOACTIVE</remarks>
    ShowMinNoActivate = 7,
    /// <summary>Displays the window in its current size and position. This
    /// value is similar to "Show", except the window is not activated.</summary>
    /// <remarks>See SW_SHOWNA</remarks>
    ShowNoActivate = 8,
    /// <summary>Activates and displays the window. If the window is
    /// minimized or maximized, the system restores it to its original size
    /// and position. An application should specify this flag when restoring
    /// a minimized window.</summary>
    /// <remarks>See SW_RESTORE</remarks>
    Restore = 9,
    /// <summary>Sets the show state based on the SW_ value specified in the
    /// STARTUPINFO structure passed to the CreateProcess function by the
    /// program that started the application.</summary>
    /// <remarks>See SW_SHOWDEFAULT</remarks>
    ShowDefault = 10,
    /// <summary>Windows 2000/XP: Minimizes a window, even if the thread
    /// that owns the window is hung. This flag should only be used when
    /// minimizing windows from a different thread.</summary>
    /// <remarks>See SW_FORCEMINIMIZE</remarks>
    ForceMinimized = 11
}

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