[英]C# show hidden window
I am developing an add in for excel. 我正在为Excel开发一个插件。 At some point, I can receive async events. 在某个时候,我可以收到异步事件。 I need to be able to show the Excel window if hidden on these events. 如果隐藏在这些事件上,我需要能够显示Excel窗口。
I am able to store the Hwnd
property, which I believe must be an immutable int/reference to identify my Excel window. 我能够存储Hwnd
属性,我相信该属性必须是一个不变的int /引用,以标识我的Excel窗口。
Can someone elaborate on this Hwnd ? 有人可以详细介绍一下此Hwnd吗? and explain how I can show a hidden window from C# using it ? 并说明如何使用C#显示隐藏的窗口?
Thanks in advance folks ;) 在此先感谢大家;)
UPDATE : shortly, that was the piece of code that sorted my problems : UPDATE:很快,这就是解决我的问题的一段代码:
/// <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);
}
hWnd
means Window Handle. hWnd
表示窗口句柄。 It's an identifying handle for the window instance. 它是窗口实例的标识句柄。
As for showing it, you could use the user32.ShowWindow
API. 至于显示它,您可以使用user32.ShowWindow
API。 Here's the P/Invoke signature, courtesy of pinvoke.net : 这是P / Invoke签名,由pinvoke.net提供 :
[DllImport("user32.dll")]
static extern bool ShowWindow(IntPtr hWnd, ShowWindowCommands nCmdShow);
And here's the ShowWindowCommands
enum: 这是ShowWindowCommands
枚举:
/// <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
}
HWnd is a windows handle, in C# it is really an IntPtr type. HWnd是Windows句柄,在C#中实际上是IntPtr类型。 Try creating a wrapper class based on IWin32Window
and use that when calling Show()
eg 尝试创建基于IWin32Window
的包装器类,并在调用Show()
时使用它,例如
public class WndWrapper : IWin32Window
{
IntPtr m_Handle;
public WndWrapper(long pHandle)
{
m_Handle = (IntPtr)pHandle;
}
#region IWin32Window Members
public IntPtr Handle
{
get { return m_Handle; }
}
#endregion
}
Then call it like this: 然后这样称呼它:
WndWrapper oWnd = new WndWrapper(pHandle);
MyForm oDlg = new MyForm();
oDlg.Show(oWnd);
Just be careful, as HWND elements are unmanaged you will be responsible for ensuring that they are disposed of when required. 请注意,由于HWND元素不受管理,您将负责确保在需要时将其丢弃。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.