Содержание

Window. Hide Метод
Определение
Исключения
Комментарии
C++ How do I hide a console window on startup?
9 Answers 9
How to hide a window in start in c# desktop application?
6 Answers 6
Process Window Style Перечисление
Определение
C hide window windows system

Window. Hide Метод

Определение

Делает окно невидимым. Makes a window invisible.

Исключения

Метод Hide() вызывается для окна, которое закрывается (Closing) или закрыто (Closed). Hide() is called on a window that is closing (Closing) or has been closed (Closed).

Окно не закрывается, когда оно скрыто, и не возникает ни одно Closing Closed событие или. A window is not closed when it is hidden, and neither the Closing nor Closed event is raised. Вместо этого свойству окна присваивается Visibility значение Visibility.Hidden . Instead, the window’s Visibility property is set to Visibility.Hidden.

Если окно является приложением MainWindow , а приложение ShutdownMode — OnMainWindowClose , приложение не завершит работу. If a window is the application’s MainWindow and the application’s ShutdownMode is OnMainWindowClose, the application does not shut down. Аналогичным образом приложение не завершает работу, если окно является единственным окном, а режим завершения работы приложения — OnLastWindowClose . Likewise, the application does not shut down if a window is the only window and the application’s shutdown mode is OnLastWindowClose.

Если вы хотите отображать и скрывать окно несколько раз в течение всего времени существования приложения и вы не хотите повторно создавать экземпляр окна при каждом его отображении, можно обойти Closing событие, отменить его и вызвать Hide метод. If you want to show and hide a window multiple times during the lifetime of an application, and you don’t want to re-instantiate the window each time you show it, you can handle the Closing event, cancel it, and call the Hide method. Затем можно вызвать в Show том же экземпляре, чтобы снова открыть его. Then, you can call Show on the same instance to re-open it.

C++ How do I hide a console window on startup?

I want to know how to hide a console window when it starts.

It’s for a keylogger program, but it’s not my intention to hack someone. It’s for a little school project that I want to make to show the dangers about hackers.

Here’s my code so far:

I see the window appear and immediately disappear at startup. It seems to open a new console right after that, which is just blank. (By blank I mean «Press any key to continue..» I’m wondering if it has anything to do with system(«PAUSE») )

So I want to know why it opens a new console, instead of only creating and hiding the first one.

9 Answers 9

To literally hide/show the console window on demand, you could use the following functions: It’s possible to hide/show the console by using ShowWindow. GetConsoleWindow retrieves the window handle used by the console. IsWindowVisible can be used to checked if a window (in that case the console) is visible or not.

Hiding a console window at startup is not really possible in your code because the executable is run by the operating system with specific settings. That’s why the console window is displayed for a very short time at startup when you use for example FreeConsole(); To really hide the window at startup, you have to add a special option to you compiler. If you use gcc on Windows (MinGW) you can just add -mwindows as compiler option in your makefile and there will be absolutely no window or «flash». I don’t know about VisualStudio or whatever you use at the moment, but changing the way your IDE compiles you code is the way to go instead of coding workarounds in C++.

In my view, this approach is better than using WinMain because it works reliably and you don’t make your C++ Code platform dependent.

How to hide a window in start in c# desktop application?

I am trying to make a desktop application that will be hidden but will display only after a time interval. I am trying to set Visible =false at window load event but it still displays.

Читайте также: Call manager для windows

6 Answers 6

For WinForms applications I have found that the easiest way to control the start-up visibility is to override the SetVisbileCore method.

Here is a simple example, the form will show after 5 seconds

The Visible property is a big deal in Winforms, setting it to true is what causes the native Windows window to be created. One side effect of which is that setting it to false in the OnLoad method or Load event doesn’t work. There’s nothing special about Hide(), it just sets Visible to false and thus doesn’t work either.

Overriding SetVisibleCore() is a way to do it. It is however important that you still let the native window get created. You cannot Close() the form otherwise. Make it look like this:

You can now call Show() or set Visible = true to make the window visible any time you wish. And call Close() even if you never made it visible. This is a good way to implement a NotifyIcon with a popup window that only is shown through a context menu.

Do note that this has a side-effect, the OnLoad() method and Load event won’t run until the first time it actually gets visible. You may need to move code.

you can try this as well..

The only issue with this: Form flickers for a moment and disappears

Did you try this.Hide() instead of Visible = false ?

Also another option can be to start the application without passing any form object in it.

Wait for some time (using a Timer ), and open your form.

In your Main method, using Application.Run() instead of Application.Run(new Form1()) . Then at some later time use new Form1() and form1.Show() .

Placing Your C# Application in the System Tray

To get started, open an existing C# Windows form (or create a new one).
Open the Visual Studio Toolbox.
Drag a NotifyIcon control onto the form. The control will named notifyIcon1 by default and placed below the form because it has no visual representation on the form itself.
Set the NotifyIcon control’s Text property to the name you want to appear when the user pauses the mouse over the application’s icon. For example, this value could be «KillerApp 1.0».
Set the control’s Icon property to the icon that you want to appear in the System Tray.

Tip: If you have a BMP file that you want to convert to an icon file, I highly recommend the QTam Bitmap to Icon 3.5 application.

— Add an event handler for the form’s Resize event that will hide the application when it’s minimized. That way, it won’t appear on the task bar.

Process Window Style Перечисление

Определение

Указано, каким образом должно выглядеть новое окно при запуске процесса системой. Specified how a new window should appear when the system starts a process.

Скрытый стиль окна. The hidden window style. Окно может быть видимым или скрытым. A window can be either visible or hidden. Система отображает скрытое окно, не прорисовывая его. The system displays a hidden window by not drawing it. Если окно скрыто, оно эффективно отключено. If a window is hidden, it is effectively disabled. Скрытое окно может обрабатывать сообщения от системы или от других окон, но не может обрабатывать ввод от пользователя или отображать вывод. A hidden window can process messages from the system or from other windows, but it cannot process input from the user or display output. Часто, приложение может держать новое окно скрытым, пока приложение определит внешний вид окна, а затем сделать стиль окна Normal. Frequently, an application may keep a new window hidden while it customizes the window’s appearance, and then make the window style Normal. Чтобы использовать значение Hidden, свойство UseShellExecute должно иметь значение true . To use Hidden, the UseShellExecute property must be true .

Полноэкранный стиль окна. The maximized window style. По умолчанию система расширяет полноэкранное окно, и оно занимает весь экран или, если это дочернее окно, клиентскую область родительского окна. By default, the system enlarges a maximized window so that it fills the screen or, in the case of a child window, the parent window’s client area. Если окно имеет строку заголовка, система автоматически переместит окно наверх экрана или вверху клиентской области родительского окна. If the window has a title bar, the system automatically moves it to the top of the screen or to the top of the parent window’s client area. Также система отключает границу установки размера окна и способность строки заголовка позиционировать окно, так что пользователь не может двигать окно перетаскиванием за строку заголовка. Also, the system disables the window’s sizing border and the window-positioning capability of the title bar so that the user cannot move the window by dragging the title bar.

Минимизированный стиль окна. The minimized window style. По умолчанию система уменьшает минимизированное окно до размеров кнопки панели задач и перемещает его на панель задач. By default, the system reduces a minimized window to the size of its taskbar button and moves the minimized window to the taskbar.

Нормальный, видимый стиль окна. The normal, visible window style. Система отображает окно на экране со стилем Normal в положении по умолчанию. The system displays a window with Normal style on the screen, in a default location. Если окно видимое, пользователь может производить ввод в окно и видеть вывод окна. If a window is visible, the user can supply input to the window and view the window’s output. Часто приложение может инициализировать новое окно стилем Hidden, пока приложение определит внешний вид окна, а затем сделать стиль окна Normal. Frequently, an application may initialize a new window to the Hidden style while it customizes the window’s appearance, and then make the window style Normal.

C hide window windows system

Requirement: there is a windows app1 in C++, i need to use .net create a console app (app2) that disables a button (b1) in app1 and adds another button (b2)to app1. The b2 button then does some verification from the form details in app1 and then enables b1.
Also I am not allowed to make any code changes in app1

my problems:
— how to disable a button of a different app.
— how to add a button to a different app.
— how to pass various textbox values from app1 to app2.

Regards,
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Re: Help reqd for adding a button to a different app.

Codecodile

3-Oct-09 4:23

Did you get the answer or solution to your issue?

I need somewhat same solutions, as I need to retrieve listbox values in another app to may app.

Is this possible, through some win32 api using handles, etc. in C#?

Awaiting.

Create an application like Microsoft On Screen Keyboard.

novarajat

13-Dec-08 6:10

Hey man, great work

I am running this piece of application flawlessly on vista.
i am trying to develop a virtual keyboard which has the same functionality as microsoft on screen keyboard. I am using

[DllImport(«user32.dll»)]
private static extern IntPtr GetForegroundWindow();
[DllImport(«user32.dll»)]
private static extern bool SetForegroundWindow(IntPtr hWnd);

private void Button_MouseEnter(object sender, MouseEventArgs e)
<
test = GetForegroundWindow();
>

private void Button_PreviewMouseUp(object sender, MouseButtonEventArgs e)
<
SetForegroundWindow(test);
>

This works but my screen flashes for moments.
Is there some better method or other way so that I can click my virtual keyboard buttons without removing focus from other window which already has focus.

Re: Create an application like Microsoft On Screen Keyboard.

styloverte116

18-Jan-09 11:14

you need to use SetWindowPos and call it with HWND_TOPMOST which is -1. You will need to cast that number to an IntPtr. to set a window to the front of everything to where nothing can go above it you use SetWindowPos(handle, (IntPtr)(-1), 0, 0, 0, 0, 1 | 2 | 16);

hiding window during a startup — shorter varinat

drweb86

15-Jul-08 3:28


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Bug with .Net Form containing a TabControl (and correction).

ikharus

21-May-08 2:32

First, sorry for my english, I lack practice!!

If you create a new Application in .NET with a simple Form (System.Windows.Forms.Form) containing a TabControl (System.Windows.Forms.TabControl) with 2 TabPage (System.Windows.Forms.TabPage) and some controls in both TabPage, and then you start this Application (which will display the first TabPage when the main form will be displayed) and then you Hide the Application with the Window Hider, the second TabPage will never show up its content once the Application is shown again. But if you show the second TabPage once before hiding it, this bug does not occur.

Therefore, every TabPage of a TabControl (.NET only) not shown before the parent Form is hidden by the Window Hider will be empty when the parent Form is shown again.

The solution is quite simple.

In the Window class, add the following const:

Then, change the Visible property by the following one:

I don’t know why the original property preserved the window state (wasMax) because when you use the SW_SHOW value with ShowWindowAsync, the Form is shown with the same state it had before being hidden. So no need to use the SW_SHOWNORMAL, SW_SHOWMINIMIZED, SW_SHOWMAXIMIZED, SW_SHOWNOACTIVATE and SW_RESTORE values.

In the Activate method, change the following code:

By this simple line:

With this correction (for my needs), the Window Hider seems to work as it worked before without the bug I have mentioned earlier.

Thanks and have a nice day.

Process Handle?

Martio

17-Nov-07 10:32

Please, I have some problem with this: (I will express by C# code, because my english is bad)

Process p = Process.GetProcessesByName(«cmd»)[0];
ShowWindowAsync(p.Handle, 0); // none action

When I write to while cycle:

while(true) // Console
<
Process p = Process.GetProcessesByName(«cmd»)[0];
ShowWindowAsync(p.Handle, 0); // sometimes action
>

If you don’t have any ideas please try to write by alternative code or please some tutorial «How to get process/program handle».

Re: Process Handle?

Martio

17-Nov-07 10:36

You are use Enumerator and I have with Enumerators big problems.

Re: Process Handle?

tajally1

23-Apr-08 23:15

i have the same problem so i searched for the solution but with out Success so i posted my problem in MSDN Forums and found the solution.

p.Handel is the problem so it have to be changed to p.MainWindowHandle that points to the window that i want to process on

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=3232949&SiteID=1[^]

.net Lösung

umbauer

30-Sep-07 20:55

Process proc = new System.Diagnostics.Process(); proc.EnableRaisingEvents=false; proc.StartInfo.FileName=extern_app; proc.StartInfo.Arguments = «» ; proc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden; proc.Start(); proc.WaitForExit();
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