Sending An Application Keystrokes With "SendMessage"

Apr 12, 2011

I have all the handle capturing and gui set up. I'm stumped as to how to perform the actual step.

I have this code:

SendMessage(New IntPtr(CurrentHandle), WHAT,GOES,HERE?)


However, none of these are giving much of the "code example" method that I need to learn how to do it. I just need to send key events such as pressing "/" or "w", etc. No, I can't use sendkeys for this.


Sending Keystrokes To Another Application?

Jan 19, 2009

I'm trying to do some interface for a game for people with mobility probs, like Parkinson, so grouping several game features in just one control.Everything goes fine but having problems sending keystrokes to the game window when they have modifiers.Lets say I want to send Alt+F1 keys, according all the search I have done, the code is:My.Computer.Keyboard.SendKeys("%{F1}")but it does just like I sent an F1 Keystroke: My.Computer.Keyboard.SendKeys("{F1}").I need to send Function Keys alone and too with Alt and Ctrl modifiers, but not success with modifiers,  the game only gets like an alone function Key was pressed.

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Sending Keystrokes To External Flash Application?

Jul 12, 2011

I have tried appactivate and by getting the process name and window title and nothing works. Nothing I try will send keys to the application.

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Aug 29, 2010

My form contains a Button and a Flash Control. The Flash Control contains a game referenced to a website. I want to send keystrokes into that control (the game) without having to be in focus. I'm not experienced in flash so when I decompiled the game, I had no idea how to script a way for it to work programatically.

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Sending Keystrokes To Directx Game?

Apr 8, 2012

I did like to make a management app for a directx game, however postmessage sendmessage and sendkeys do not work...

it's for skyrim, not an online game.

how to send a key to is? have been searching for hours now and couldnt find anything besides people that say they used directinput but leave no resources or examples...


That application can do it... Weird that he's using Sendkeys because it doesn't work in visualbasic

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Sending Keystrokes To Inactive Window

Oct 24, 2010

I'm sending keystrokes to in inactive window. And I got that all good.

But now on my program there is a textbox pass, and I want to get that text, and send it threw postmessage. But It doesn't seem to work.

Dim pass As String
pass = textbox1.text
PostMessage(windowHandle, WM_KEYDOWN, pass, 0)

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VB Sending Keystrokes To A Minimized Window/app?

Apr 26, 2012

im a complet noob in vb . i have been trying to figure out how to send keystrokes back to my own application , while minimized/ Or focused on an other window.i think i need to use PostMessageA . i read about it on forums. But its like chinese for goal is to run these little programs by the 100's on 1 pc. and they just press a key in their own application , over and over.i was thinking something like this

Private Declare Function PostMessage Lib "user32.dll" Alias "PostMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Private Const WM_CHAR As Long = &H102
PostMessage("notepad", WM_CHAR, "T", 1)

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Sep 11, 2011

I need to send keystrokes using my InfraRed port on my laptop. As simple as a TV remote control. -being able to send numbers: 1 .. 2 .. and left right etc ... How to access the IrDA port?

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Send Keystrokes To A Different Application?

Jul 26, 2009

I am using visual basic code, specifically the sendkeys.send method, to send keystrokes to  a different application,  in my case Acrobat Reader.  Here is my problem.  I am sending instructions and text to define a path to a file I want to open in Acrobat Reader.  Every keystroke is being sent and interpreted in Reader correctly except the Colon.  This is the line of code I am using:Sendkeys.send("C:")

I have tried every variation of this simple line of code I can think of, but the result is the same.  Reader for some reason wants to interpret the Colon as Uppercase Q, so what I get is CQ.  This of course totally messes up my path to the file I want to open.Sendkeys. sendwait("C:")  Behaves the same

I understand there are timing issus with this method so I have added code to my app.config file suggested in this forum for taking care of the timing issue.  I have also inserted delays into the execution of the program steps.  Nothing I have done solves this problem.I wonder if anyone else has experienced this or a similar problem and if so what was done to correct it.

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Keystrokes In Visual Basic Application?

Dec 9, 2011

I am looking for some tip on how to send keystroke of a mouse button click. Basically my requirement is when a list box is dropped it shows a datagrid, right now user has to click 2 times to get focus on datagrid, although i send a focus on datagrid when list is dropped from dropdown event still the focus stays on list box, i have to click 1 time to release focus from listbox then click on datagrid to set focus. I like to automate this 2 clicks with a keystroke. I dont see any mouse button click keystrokes.

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Send Keystrokes To Background Application?

Jul 20, 2010

how to send keystrokes to an application that does not have focus and is not selected. i have read about sendmessage, but am not sure how to use it or anything, not even sure if its what i need.i dont need to send anything but normal character keystrokes?im using VS 2008?

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Access A 3rd Party Application In The Background With The SendMessage Method?

Jul 27, 2009

I want to access a 3rd Party application in the background with the SendMessage method. It just needs to send a "space" to the software to trigger an action. It is important that this is done in the background because its a periodic event (ca. every 10 seconds), and it should be possible to simultaneously work on the same machine.

I tried to use the same approach which is shown in [URL]

The code I used is as follows:

Const WM_CHAR = &H102
Const BM_CLICK As Long = &HF5&
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd


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Apr 8, 2010

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Mar 1, 2012

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How to integrate into my application?

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Apr 12, 2011

I'm using I need to send keystrokes to an application. Is this possible? I'm sure it is. I need to be able to do other things while this program is doing this!

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Sep 2, 2009

I am doing a project on sending and receiving sms. I am doing this using the visual studios 2005 ans SQL Server Database to store the send or received sms. I have search on sms in the internet but the problem is that it is using C# as I am using the language. Even though some of the research that i came across is in but the application did not work.

In my research, the sending and receiving of sms application uses sms gateway, AT command. But I am not sure which one to use becoz I am doing this application for my project. Hope for any recommendation on which one to use either the sms gateway or AT command or any other device.  My lecturer said that my project is most likely like the M2U Mozat. Not only that I am doing the sms but also the email. The email part is done by my partner but the problem is that he creates the email using the SMTP server. How can using a SMTP server to create sms? It is because the part that I am doing which is the sms and the email to combine together.

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Jun 11, 2011

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Oct 5, 2010

I wrote a code that is supposed to send a mail message on certain event

when i run the app on my machine I get an error telling me :

 {"No connection could be made because the target machine actively refused it"}

when I run the same code on another machine it works just fine

this is my code:

'create the mail message
Dim mail As New MailMessage()
'set the addresses


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Jun 22, 2009

So what I am trying to do is take information from a rich text box and send it over to another application.SO far it works but it doesn't handle spaces well.

Dim cm As New c_manager.Form1
cm.Controls(1).Controls(0).Text = rch_subroutine.Text


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i am to write a .net application(no gui) which would access three excel files in a folder, do some excel specific operations on them and then email them to certain persons.the list of email ids are available in a fourth excel sheet. Finally this entire application has to be scheduled to run at the end of each month.


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Aug 29, 2010

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Example: Application opens at start-up, I post an alert of an upcoming network outage, the user gets a notification in the task-bar that when clicked will open the full message in my application.

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Mar 11, 2010

I Need a simple project which is developed in Microsoft Visual Studio 2005 in the project features are

1. I have to send multiple SMS from a mobile device connected through a USB.

2. I have to receive SMS from a mobile device and parse it and store it into various text file.

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Nov 10, 2009

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1. I have to send multiple SMS from a mobile device connected through a USB.

2. I have to receive SMS from a mobile device and parse it and store it to SQL Server

I can handle with the rest of requirements of My University Final Project.

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Aug 20, 2009

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Mar 1, 2011

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Jun 7, 2012

I'm building a windows forms application that's supposed to run on a remote/isolated machine and send error notifications by email to the admins. I've tried employing System.Net.Mail classes to achieve this but I'm running into a strange problem:

1. I get an error message:

System.IO.IOException: Unable to read data from the transport connection:
An existing connection was forcibly closed by the remote host.--->
System.Net.Sockets.SocketException: An existing connection was forcibly closed by
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Sep 23, 2010

I am using following code to send emails.  This works best in Windows XP but fails in Vista, while with same Vista, I can send mails using Windows Mail. what change I should make to make application work with Windows.

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Jun 9, 2011

Is Mobile PC suit required for sending sms from application? Is any kind of SMS Gateway needed for sending sms?

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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 2010

Public Class Form1
Public Shared data As String
Private Sub SendintText(command As String)


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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Dec 11, 2010

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So the problem is how to send this data to program out of focus, I can send strings with appactivate but it will open my security program to screen everytime memory changes witch is almost every milisecond so it's almost useless cause it keeps switching focus. I need something to send it out of focus, so my question is;

I make a hook between my program and my security program, send messages/strings out of focus or in tray?Also it would be good if I could make my program "invisible" so he can't be seen even in tray and still keep working.

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Apr 15, 2010

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Mar 24, 2010

As some of you may know, I'm trying to develop a client/server application that requires sending files and text. Text is not a problem, this works fine, and for some of the part, sending files works, but they get slightly mangled in the process. For example, I used a 4x1 BMP that was alternately coloured red and white and tried sending it across. The output was the correct image dimensions, but the colours were wrong. It was more like a very dark red and very dark grey. I inspected the files with notepad, and the header was the same, but the data was different.

I did some research and apparently need to use a BinaryReader and BinaryWriter as opposed to reading the data as a string (like I was when it was being mangled) but now the data is all wrong, even filesize is different.The code below is a simple example of code for reading an image and then writing it again elsewhere using Binary Read/Write.


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Jul 3, 2011

I am fairly novice hobbyist developer. I am developing a simple calculator app. How can I detect the keystrokes, like when the user presses "1" key on numpad or they "1" key above Q key? I want to call the same subroutine that runs when the user click on the butten control "a "on calculator's main form.

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I am trying to Send an Email with an attachment (using Gmail) but I keep getting errors like "Operation Timed out" or Failure Sending Email". It was working earlier today but I found out that i needed to add Using statement because the email was having a file open that had to be deleted after it was sent but afterwards it doesn't work.

Here's what I have (Portion of it):
Private Sub SendMailOneAttachment(ByVal un As String, ByVal pass As String, Optional ByVal smtp As String = "")
Using oAttach As Net.Mail.Attachment = New Net.Mail.Attachment((Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) & "\" & My.Computer.Name & "_" & fName & " .zip"))
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[Code] .....

The ports are correct I believe, no firewall up on my PC...

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Dim NotePadProcess As Process = New Process()
NotePadProcess .StartInfo.FileName = "notepad"
NotePadProcess .StartInfo.WindowStyle = ProcessWindowStyle.Normal


I am trying to send some keys to a program that I launched, but every time i send the keys focus is not on the program and the keys are sent to the wrong program. Is there a better way to send keys to a program or a way to set focus on a certain program?

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May 23, 2010

I'm trying to create an application similar to the site WhatPulse, which will generate an image with my clicks and keystrokes. WhatPulse only updates the image once every 24 hours, so I am going to make an application to keep track of that for me, only with realtime stats.

How can I count total keystrokes (outside of the application itself) as well as total clicks, in

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Sep 9, 2011

I am facing a problem in my code. I am working on an application in, its a windows based application. On one of my form I need to perform so many data driven operations.

if I press tab on one of the text box, I need to set a computed value in other text box and need to set the focus to that text box.

I write a code that is a like to this.

Private Sub TextBox1_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyUp
Select Case e.KeyCode


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