Send A Keystroke To An Application With No Window?
Oct 4, 2010
I'm trying to send a single keystroke to an application that has no window (because I have launched it with StartInfo.CreateNoWindow = True) and therefore I can't use SendKeys. I had a look at SendMessage but this doesn't seem to be quite right as the programme I'm sending it to doesn't process message queues.I would usually use the StartInfo.RedirectStandardInput property and send it via a StreamWriter but this doesn't not work as the application it is being sent to is looking for actual keyboard keystrokes, rather than pulling info from StandardInput (an old C++ programme using getch). Anyone have any ideas how to send a keystoke to an application with no window (FYI I don't need anything back from it, I don't need to wait until it's processed, and I only need to send one letter and no carriage returns or linefeeds, though these wouldn't hurt)
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Oct 21, 2010
I'm trying to send a keystroke to a window (of an external executable) but am having problems.
If I launch the exe with a window I can successfully send it a "q" (in order to make it exit) using the follow:
1) AppActivate and SendKeys
2) SendMessage API using WM_KEYDOWN and WM_KEYUP
3) AppActivate and keybd_event or SetForegroundWindow and keybd_event
However, if I launch it without a window, obviously method 1) does not work as SendKeys only work on applications with visible windows, but I thought that method 2) would work. However, it doesn't. Also, using method 3) with SetForegroundWindow as this seems to only work with visible windows, which is not really a surprise I guess, given the name.
Another method I have tried, which won't work is using the RedirectStandardInput - I have this working correctly, but the application is looking for keyboard events, not writes to its StandardInput stream, so this doesn't have any effect.
Finally, I have tried using SendMessage and FindWindowEx, and TranslateMessage, to find any child windows or controls that should be receiving the messages, rather than the main window. However, no child windows or controls are found, and I wouldn't have thought this would be the solution given that, if the window is present, the main window receives the message as it should.
So, I have confirmed that the messages are going to the correct window, as they arrive as they should when the application is launched with a window, but I cannot get the application to receive the message when it is window-less. The solution doesn't have to involve messages, or even be particularly robust, but this is what I have tried so far (all the obvious stuff!)
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Nov 20, 2008
the code that send keystroke to another app by vb.net
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Mar 29, 2010
is there something wrong with this? its not sending the key
Dim inputEvents As New USER32.INPUT
inputEvents.ki.wVk = Convert.ToInt16(key)
inputEvents.ki.wScan = 0
inputEvents.ki.time = 0
inputEvents.ki.dwExtraInfo = IntPtr.Zero
[Code]...
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Mar 28, 2010
i am trying to send keystroke using sendinput but it doesnt seem to be sending. I have sendInput declared in user32 class with the input type
dim key as Keys = Keys.A
Dim inputEvents As New USER32.INPUT
inputEvents.ki.wVk = Convert.ToInt16(key)
[code]....
am i setting the flags wrong to send a key? not 0 then a 2?
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Jun 2, 2011
I got a window form, and I want to send data to another computer or a server over internet after the submit button is clicked. Yes, this is a very "general" question (I cant not ask it in more detail), because I don't have any information how to do that, I google it, and I heard WCF, but I am not sure how it actually can do this job (seem like WCF is related, but still researching).
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Mar 20, 2012
I have an issue regarding Sendkeys Class, as i want to use this class in order to send some keystroke to the active application. As a first step i want to test the {Enter} keystroke, so in order to achieve that i made a simple application in vb.net 2010
Public Class Form1
Public Shared data As String
Private Sub SendintText(command As String)
[Code].....
By the way in order to use double quotes in a parameter you need "test"...(i have spent 15 min to find out) so it might be usefull...
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Apr 9, 2012
I have a filter that is used to populate a grid view and the url will conain: /example/grid?value1=1&value2=2
It will then have a link to page 2, which allows them to edit something.I then want them to click a link that will send them back to the gridview under the same parameters of: /example/grid?value1=1&value2=2
Is this possible? How do I hold on and fill in the URL values so it knows how to refill the grid view accordingly?
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May 2, 2012
Excuse me for posting this, but I have searched both Google along with this forum before asking this question, maybe I'm not using the right keywords but I apologize if it's easy to find.I would like to know how one could close a third-party window (application) if a specified string was found in the window title.
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Nov 30, 2010
I would like to know how one could close a third-party window (application) if a specified string was found in the window title.
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Dec 12, 2011
If you have ever noticed in the Task Manager, when you right-click on the running task, you have many options which include 'Minimize' and 'Maximize'. Is there anyway to do achieve this in vb?
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Feb 26, 2011
But i have a problem so i want to Send one key to a minimized form if u know what i mean like running it in the background its the key "F5" that i want to send. It works if the window is focused but as soon as i start my internet it refreshs the sites there and not where it was ment to b
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Jun 11, 2011
I am trying to code a program to send keys to a certain window.
For example, in notepad I want the program to write "test" over and over again, in the notepad window. However, I do not want this window to be an active window. Is it possible to make it send keys through a background method?
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Mar 23, 2010
Want to send the text from my current vb application to the Active Window and that text should be displayed in the text area of the active window.
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Mar 13, 2011
How do I make the form send keystrokes such as Tab, Enter, Left Arrow etc to itself without interfering with other programs? If I use the SendKeys.Send method, it would send it to whatever window is opened. Is there a way to only work with the form? Very quick random example: Let's say I have 5 textBoxs and I click the 'Tab' button 5 times. What would happen ?
It would change the focus from one textbox to another right? Can I make this happen automatically ... like make it happen in the background and only to the form itself. So If I'm typing something on Notepad, I don't want to receive those 5 tabs. By the way I know I can use this code to change the fofucs, but remember its only an example.
[Code]...
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Jun 30, 2010
I need to have a VB form that runs out of focus behind another program. When I press "A" (I'll use "A" and "B" as my example keys), "B" is then sent to the program in focus from the VB form and held until "A" is pressed again.
I've worked out how to get it to repeat a key press hundreds of times but I need it to HOLD the key, rather than to just Press and De-press countless times.Here's the piece of code which repeats the letter "A" 100 times:
Dim Index As Integer 'My count variable
For Index = 1 To 100 'Count from 1 to 100
[code]....
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May 2, 2012
How to send a message to parent window in VB .Net?In my VB .Net application, there are a few windows which pop up in order.Main form starts form1, form1 starts form2, and form2 starts form3.In form3, I have a button which calls "Jump to Main". Once I click this button,I want to it to close
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Dec 19, 2008
In Visual Basic 2008 Express Edition, how would I send keystrokes to a specific window. Right now, I just keep the window I want on top and use sendkeys.send("{enter}"). The window that I want to send keystrokes to is my applications window.
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Jan 8, 2010
I'm trying to send the keys "ABC" and "Enter" to Notepad when I press a button. I've been reading forever on Hooks, "SendKeys" functions, but I can't figure it out. I don't think I need to use a hook, because I'm not making a hotkey or anything, I'm just pressing a button and sending the keystrokes to a window when it's not focused.
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Jan 14, 2012
I've done some research and still cannot find a working solution. I am basically setting the foreground window with AppActivate to Google Chrome. This works fine. Then I set the cursor location to a specific point. Fortunately, the last step of this process is to send a left mouse click but the code below occurs with an exception and does not execute:
Public Declare Auto Function SetCursorPos Lib "User32.dll" (ByVal X As Integer, ByVal Y As Integer) As Long
Public Declare Auto Function GetCursorPos Lib "User32.dll" (ByRef lpPoint As Point) As Long
[Code]....
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Dec 21, 2010
I've been trying this for 2 days.In ASP.NET and VB.NET I've page1.aspx and page2.aspI would like when I press button1 in page1.aspx to trigger button1.click event and open a page2.aspx in a new window and send to it data.All this can easly be done if no new window, by Server.Transfer or Response.Redirect.But unfortunately they don't have an option to open a new window.[code]....
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Jun 28, 2010
I used to know vb6 and I need to make a quick application.
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Jul 27, 2009
Heres my code that does not work:
Private Const MOUSEEVENTF_LEFTDOWN = &H2
Private Const MOUSEEVENTF_LEFTUP = &H4
[code]...
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Mar 3, 2009
I know how to send mouse clicks and keystrokes into an application when it is open and active, but this particular application the task is very repetitive and can be done with a script of sorts. What i want is how do i make a program to be able to send inputs (key clicks) into the application when it is minimized (the application minimized that is). doing this minimized would then allow me to do other more important things whilst the vb program is sending instructions into the other app.[code]...
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Jan 27, 2009
Is it possible to send window messages from one computer to another through Dot Net 2008.suppose i have 2 computers on a domain, now i want to send message from one computer to another.
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Aug 8, 2009
How can I Send key Strokes to a Game ? I don't want to Cheat or anything this is for private use
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Apr 25, 2010
In WPF I have one window opening a second window that allows some data selections to occur on. Once the selections have been made I then want to submit/close the second/sub window and have the data pushed back to the opening/parent window.
I can push data into the sub window from the parent via public properties, but have not worked out how to get it back the other way.[code]...
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Jun 2, 2010
I have an interesting issue, I'm trying to automate a data retrieval process.Currently the user goes out to a secure web site and inputs his/her username and password and then selects the ok button, they then proceed to the location where the data is located at and do a copy and paste. I have thought about using the SendKey method from VBA but everything I see says it's not reliable.I believe I have the section after the sending of the login/password completed. For the life of me I can't figure out how to automatically input the username and password and then select the "OK" button. Before anyone asks, no can't view the source code so I can't get the ID field, there is no way for me to view the source code at all I have tried multiple different options all with no luck.
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Mar 25, 2010
how do you send a mouse click to a window that seem to not accept them? I have tried sendmessage/postmessage, mouse_event and sendinput. None of them seem to work. Whenever the target window is in the foreground, i cant set the cursor position or do mouse_event click at all. But once it went to the back, everything works... cursor.position moves the mouse, sendinput and mouse_event can click on a different window, just not the one i want.
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Jul 17, 2010
I tried a variation of the code at the end of this thread.>> [URL] which is the following code using; one Button one Panel
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