I'm using sendinput to send keystrokes to external applications launched from my main application. However , the only way I have been able to get it to work is by focusing the external application then sending input. I want to know how to use sendinput to send keys to a background process without giving it focus.
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I tried to make process that monitores file for changes , makes its md5 hash and outputs.
[code]
Dim f As FileStream = New FileStream(filename, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite, 8192)
Dim md5 As MD5CryptoServiceProvider = New MD5CryptoServiceProvider
md5.ComputeHash(f)
[code]....
It doesn't output at all, it seams to freeze or smt.
Instead of making a WinForm for my application, is there any way to let it operate in the background without a form or anything?
View 1 RepliesI wanted a ProgressBarStyle.Marquee animation while a query is running. I don't want the user to think the application is locked up. it's really not progress just MarqueeAnimation. the issue I have is it's not running as a thread or in the background.
Private Sub ButtonExcute_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonExcute.Click
ProgressBar1.Style = ProgressBarStyle.Marquee
ProgressBar1.MarqueeAnimationSpeed = 60
ProgressBar1.Refresh()
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I am working on a project and i have come to designing my splash screen... i dont want a useless one what just shows a loading bar what does nothing, im trying to make it useful and show while the main form is loading however this is proving to be a pain in the backside.. i can make the splash screen load when the exe is executed then close when the form is ready but i want to add an animation to the form (just a moving logo) this is just done by me running an timer what changes the location at each tick.. i can get it to work well on its own but when i add frmMain.show() to the code to load the program the animation will not work... i only get this when i ask the program to load the main form..
View 2 Replieson the loan of my application i created a background_worker to pre-load some of my child forms. here is the problem - it seems that the forms gets loaded into the second process and it wont have any affects on the original process .
In another words when i try to show the preloaded form nothing is displayed. How can i ask the background process to "Merge" with the main process when it is completed! i am not sure if merge is the best word to describe what i am trying to do here!!!
also if i try to re load the form that was created by the main process i will get exception saying you can't change one some that was created by another process
I'm developing app in VB.NET 2008.
I have one prob that i'm creating excel sheet runtime, loading data and printing excel sheet through my application. Actually it has 150 sheets to print.
i'm printing by using this code
xla.Sheets.PrintOut(Copies:=1, Collate:=True)
To print 150 sheets , its taking around 17 min. so now the user is waiting until printing process finish(ie 17 min ) .
actually i don't want to make him wait, i want to execute this printing process in backgroud. so the user can work on other process in my app.
how to print this in background ?
What I'm trying to do is show a form while a background process is running. Similar to a progress bar but not a progress bar. We have a form that has an animated gif (customer request) and that's it. no other controls. They want this form to show while the processing in the background is running.
View 5 Repliesi've the need to close an ffmpeg conversion started in background with the vb.net process.start.I've seen that an ffmpeg could be closed by hitting the key 'q'.How can i send the 'q' key to the running ffmpeg process?
i intercept the process with this code:
Dim pProcess() As Process = Process.GetProcesses
For Each p As Process In pProcess
If p.ProcessName = "ffmpeg" Then
[code]....
I am trying to use parallel processes in baclground but it looks like it block the application till all the processes are not completed.[code]...
View 7 RepliesI develop an appliaction which is running a process in the background. This process is "forked" from the application (I'm not using threads). The process may take a few minutes while the 'father' application is waiting to the process output, so I'd like to enhance the application with the following:
a) a "Stop" button (like in IE, FireFox) to stop the process in background
b) A status bar that displays what's going on while the process is running in BG.
how to draw a button or status bar of course... I mean how VB.NET handle with stopping or displaying while something else is running in background and how to do it.
I have got a couple of VB Powerpack Ovalshapes on my Form.I use these for a quick indication if the networked device is online or offline.I can't seem to control the Visible function (or any other function for that matter) one my Background Worker is running.For my Textboxes I used a guide by jmcilhinney which worked great for them but there is no 'Invoke' property for graphics controls.
View 1 RepliesI have a spreadsheet that contains details of change requests; one row per request. This information needs to be copied into a Word form for sending off to our customer who then completes the response section. To speed up this process I have written some code that utilises the mail merge feature of Word and merges the relevant info from the spreadsheet into a Word form. This runs from Excel when a button is pressed.The problem comes when I go to save the workbook and exit Excel; it stays running in the background as a process in task manager.
[URL]
I'm fairly sure it has something to do with the merge code itself but my knowledge of VB is enough to grasp what is happening but not why it is happening. If I open the Word doc that has the merge fields in it, then open the spreadsheet that houses the info Excel says the workbook is already open.
I'm writting a "Console Application" using Visual Basic (VB.net) 2008 Express Edition in a Windows XP SP3 environment, and I'm trying to get SendInput to work.
I have been able to get SendKeys working, and I'll use it if I must, but there are some unpleasant control issues. Plus, it's incompatible with Vista, from everything I've heard.
So, I'm including two attachments. The first is a quick-and-dirty working example of SendMessage (actually SendMessageString) which I've used to half-way convince myself that I know how to use the "user32.dll" API's. (For simplicity, I've stripped out all of the error-testing logic.)
The second bit of code is my unsuccessful attempt to get SendInput to send some test keystrokes to Notepad. (I've heard some people say it can't be done in VB.net. Are they right?) To get a clean compile, I had to comment out 'CopyMemory' because how to get it to work. Is it essential to the code?
Tim
Public Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
(ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr
Public Declare Auto Function FindWindowEx Lib "user32" _
[Code]...
My curse seems to be SendInput... I have tried many sites and code variations and it never works right... it always returns an error. So can someone just whip together a quick class that has 3 public methods, one for keyboard (that takes a Keys data type) one for mouse, and one for Hardware?
View 7 RepliesI'm trying to write a program to control input. Unfortunately, thing always seems to fail.
The thing always comes up with "Application Defined or Object Defined Error". It doesn't help that I can't find the complete listing of error codes[code]...
I need to send some keys in way like it was sent from keybord
View 1 RepliesI tried this code with windows7 and xp,with 3 different pcs and both with .net4 and .net3.5 and it doesn't work. Basically I want to press the left mouse button. Searching the net I've found that the only decent solution is to use sendinput function, two times (one for click and one for release) the function always returns 0 with an error code "operation completed", but the the click doesn't happen...
[Code]....
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]...
I am using SendInput to send some keyboard commands to a dialog box. It is already the active foreground window when I call SendInput. I first send "Return" and then a bunch of other stuff. The dialog box opens with a button selected by default, and when manually selecting Enter, the button is clicked on the dialog progresses to the next screen, but my SendInput call doesn't advance the dialog.
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I am replacing an AutoHotkey script with a VB.net application. Part of the script involves sending keystrokes to an active application. VB uses SendInput and does send the keystrokes, but the application doesn't "get" them, but when AutoHotkey sends the same key to the same application, it works. I have verified that VB is indeed sending the keys properly. Does anyone know how to imitate the autohotkey Send function?
View 7 RepliesI asked a similiar question in the VB6 forums with some methods I was trying there, but this is a different method that I'm trying in .Net that I cannot get to work. First what I'm trying to do, I play a game that allows attended macroing, so I'm trying to write a program that I can record and playback macros in. I already have the recording down, and I can playback my macros using older API Keybd_Event and Mouse_event, but not in the game. The game recognize all the mouse events, but does not recognize all the keyboard events. (It is a DirectX based game by the way). For example if I record they keystrokes h e l l o and have notepad in focus and play it back it will type hello in notepad, but in the game they keys are not recognized.
[Code]...
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?
I got the code from ALLAPI but it gives me errors of declarations that have changed in this version of VB, i tried to update the code but...
Public Class Form1
Const VK_H = 72
Const VK_E = 69
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Do you guys have any ideas how to do the codings for SendInput?Like a key is pressed and the data depending on what the user had entered in the TextBox will appear in a Notepad and then save it.[code]...
View 1 RepliesI�m trying to achieve mouse movements with SendInput.
There is code that got from Pinvoke, [URL]
<DllImport("user32.dll", SetLastError = True)> _
Private Shared Function SendInput(ByVal nInputs As Integer, ByRef pInputs As InputLanguage,
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I have written a windows service that is meant to launch a notepad when a specific action happens. The problem i have is that even though the service launches notepad, the actual notepad it self is NOT visible. I know that it has been launced because i can see the process in the task manager. By the way the process is listed as a SYSTEM process rather than a process under my user name (i believe that is because my process is a "LocalSystem" one).
View 4 RepliesIam wanting touse sendinput in a dos or background type app (can be a regular app thats hidden) that emulates mouse clicks and sends mouse moves to another multimouse application. an project that im working on for my school i work at and i need to send the input to it. The overview of the project is i need to have this code be in a service that runs in the background that when a person does a gesture with my kinect code then it clicks the left mouse or sythesis it with sendinput (need mouse up and down sent for this to work). The end programs that receive input are: a program written in the multipoint sdk and mouse mischief. I though about using the default usb mouse driver as an emulated mouse driver to handle the part about creating a usb mouse device that works
since most newer computers are using usb.
Background of form: black
background of char, bombs and shrooms: transparent
picbox behind char, bombs and shrooms is regular (marioland)
How can i fix it so the transparent parts dont see form as background but marioland as background?
I am using query from a SQLite database as the AutocompleteCustomSource for a ComboBox. Also, I want to load data in separate thread. My LoadData method works fine when called directly, but it fails when it is called from the BackgroundWorker thread. When it is called from the background thread, it throws a Specified cast is not valid exception on the csearch.AutoCompleteCustomSource.Add(hh("Taj")) line. Below is my code:
Sub LoadData()
Dim connetionString As String
Dim cnn As SQLiteConnection
[Code].....
