C# - WM_KEYDOWN - Send A Key Stroke To One Application Through PostMessage
Jul 23, 2009
I'm trying to send a key stroke to one application, through PostMessage. I am using too Spy++ to try to understand how to send the message, as I do not fully understand its inner workings. In this picture, the first item(selected item) was made with an actual key stroke made by myself. The one with a red elipse around it(below) was made with the following code:
[Code]...
I guess it must have something to do with the last PostMessage() parameter, but I can't figure out how it really works. I can see in the original key stroke the ScanCode = 48, and in mine its 0, and also fExtended is 1 and in mine is 0. How can I make it look the same? edit: Here is the msdn link. [URL].aspx I cannot understand the last parameter's working, if anyone does..
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Sep 22, 2009
How would I use PostMessage to send Keys? I dont want to use SendKeys.Send
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Nov 28, 2009
give me a link to an Example on SendMessage/PostMessage? (I want to use SendMessage/PostMessage to send Strings)
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Jun 19, 2009
I'm working on it for a couple of days but I couldn't get any success.. I'm trying to access Calc's edit box and trying to write something there but I couldn't do it =( what's wrong with my codes?
[Code]...
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Jul 12, 2010
My application watches two buttons:
1. F11 => my application minimizes and hides another window (windowHandle is its handle), then sends there WM_RBUTTONDOWN (right mouse button click&hold).
2. F12 => my application unhides and restores that window, then sends WM_RBUTTONUP (right mouse button release).
The problem is when I press F11, and then click somewhere (so windowHandle loses focus), the right mouse button releases automatically, but I want it could be released only after I press F12. Here is part of my
Public Sub Tick()
Dim windowHandle As IntPtr = FindWindow(vbNullString, "App")
If GetAsyncKeyState(Keys.F11) Then
[CODE]...
So, is there any way how to not release right mouse button?
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Nov 24, 2009
I want to get the key what I have pressed. I got it through keypressed and keyup events. but i need to get through window procedure.
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Sep 16, 2009
I'm developing a program where I've had to add a keyboard shortcuts system. The problem is it uses a third party OCX for a part of its display, and it is catching some essential WM_KEYDOWN messages when in focus, like Ctrl+C, Ctrl+V, etc. I've tried catching the WM_KEYDOWN message through WndProc, but the message is not propagating, so I guess the keyboard messages go from the inner container to the outer one, don't they?
The WM_KEYUP messages can be caught tho, but I'd prefer to be able to catch some of those messages on the KeyDown event. I'm aware I could make some low-level hook, but I'd like to avoid this workaround. Well, if the WM_KEYDOWN message goes from the OCX to its top level container, I guess I'll have to treat those key combinations in the KeyUp event.
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Nov 11, 2010
I made a web browser and i want to make the backspace key go to a specified url instead of to the previous one. this is what ive got but not working it freezes the application if i press back space
If e.KeyCode = Keys.Back Then
Navigate[URL]
End If
But if i take out the middle part it wont freeze.
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Sep 23, 2010
I'm developing a web application that displays items from a work queue to a user. When an item is selected I have the app lock that item out so no other user can select it. By hitting the back button in the app it unlocks the item.
I want to be able to unlock the item if the user hits the backspace key. I know what code I need to unlock it. I just need to know how to make the code execute on backspace key stroke.
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Apr 26, 2010
is it possible to make one application send a task to another application and recieve the result from that secondary app?i made a text editor program and i added a scan feature and i made another app that has ocr capabilities.The scanner ability is in my text editor program, the ocr program doesnt scan you have to input an image into it and it will give text result a few seconds later.the prob is alot of times the ocr code uses sooo much memory and crashes when its incorporated with my text editor, but individually each application works fine and doesnt take too much memory. Memory wont be even an issue if the ocr program is standalone so that when it is done decoding image the application can be made to exit. now here is the question, how do i make my text editor send the image to the ocr program and how do i make my ocr program send the text back to my text editor? is it possible? i mean the only way i know off is creating temp files in a certain folder and having a timer on each program that keeps waiting for temp files. That just seems like pretty lame coding to me i was wondering if there's a better way?
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Apr 5, 2011
I need to send a short string, (less than 30 bytes, but sent every second), from one VB application, to a Delphi application.. is this possible, using CopyDataStruct, WM_COPYDATA and SendMessage functions in Windows?
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Dec 29, 2011
How exactly would I use PostMessage and PeekMessage? I'm trying to make a Client/Server type of program. The server program will send a message to the Client and the client will do a set of commands when it gets that message.
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Jul 22, 2009
How do I use postmessage in 2008?
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Aug 23, 2010
I am trying to write a small plugin for eventghost for one of my software (audio player). EventGhost can send SendMessage or PostMessage messages to control other apps. How can I receive such messages in a VB.NET app?
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Aug 4, 2009
how can i do this i want it to send it to my From1 and to the x,y i want
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Dec 13, 2009
Can anyone give me a SendMessage/PostMessage Example? I want to make SendMessage/PostMessage work like SendKeys, except instead of sending keys to the app in focus, it will send keys to a certain app. I've looked at a lot of examples that use notepad, but they all need to use "find" the "EDIT" thing. I dont want that. Is there any other way?
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Nov 19, 2011
Due to use postmessage tow times, I want add a delay (50) between tow postmessage(), and my timer interval is 1000.
Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
If CheckBox10.CheckState = CheckState.Checked Then
st = Int(Val(TextBox17.Text) * 10)
[code]....
and I konw Thread.Sleep(50) is not good, but how to use timer stop here.
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Nov 17, 2010
I have an Vb.net application made by a third party , that I need to control using outside resources from a simulated environment and must not interact with the desktop. To simulate inputs that a user would normally input from a special screen with specific keys around it, I've built a test control library to control it and send the form image to a .bmp. The form cannot be visible and showed in taskbar , the bmp output will be displayed by the simulated environment.Using PostMessage and sendKeys work well as long as I don't but ShowInTaskbar = False for the main form. After many read & testing, I have learned enough to try what seems to be the only thing that would work. I've created a form that I setparent using HWND_MESSAGE parameter, this should create a Message-Only Windows, that are supposed to received postMessage, and subclass it's events.msdn.
I can't seem to get it to work, and I was hoping someone could tell me what I'm doing wrong.I have been testing several different ways found through out the web about .net , and short of going into message thread peek and feed(maybe(may be)my last hope), they all seem to work until I take the forms out of the taskbar.[code]
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May 16, 2012
Although there are already a few resources online that address this rough topic, I still haven't found an answer that works for me.I desire to have full communication between my VB.net process and my C++ process. I would like to be able to send a string to and from the C++ process, but for the time being I need to achieve:
Sending a string to the C++ process, and handling it.This creates a few points that I am uncertain on, but I'll try to keep this as simple as possible...using the following function declaration in VB;[code]....
And finally, I used the IPC example here to send the message. This example sends the message using C#, but the concept was all I needed (not to mention that it's a walk in the park to convert such code to VB). Note that in my VB implementation, I didn't need to terminate the string with a null character.
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Dec 23, 2008
I am launching an external that brings up a window that is split into two frames. I am able to get the handle of the frame and what I want to do is click inside the frame in a certain area.
For example, if I open "System Information" by launching msinfo32.exe, how would I click on Internet Settings in the left window pane? I don't need the exact coordinates, just an explanation of how it can be done using SendMessage or PostMessage.
I've tried things like:
PostMessage(sideWnd, WM_LBUTTONDOWN, 200, 1200)
PostMessage(sideWnd, WM_LBUTTONUP, 200, 1200)
I wasn't sure if the end two numbers would be coordinates, but if they are, I've tried different numbers and can't seem to get it to click anything other than the first item in the list of the left window frame.
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Nov 10, 2010
We have a form that is saved to the system tray and can be viewed in one of two ways.One view is like a rectangle and the other view is more of a square. In either case, there is a MaximumSize set on the form. We would like to use WindowState to toggle between the two by allowing the user to click the Maximize / Restore icons in the title bar.The problem is that when the user clicks the Maximize icon, the form jumps to the upper left corner of the screen. This is logical, since a maximized form should be anchored to the upper left. But in our case, the MaximumSize property prevents it from fully maximizing. The actual size is around 800 by 400. If they then click the Restore icon for the second view, it jumps back down to the original location.
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Apr 27, 2011
First of all, is it even remotely possible to have PostMessage or SendMessage "press keys" inside of a Fullscreen game? I.e. use the Chat? (Requires the user to activate the chat box, type in the message, then send it, which is all done with the keyboard)
I've tried many different ways using WM_KEYDOWN and WM_CHAR, and nothing worked.
[Code]...
I am trying to get it to activate the user's chat by pressing enter, type in the text, then press enter again. Except, I would like for the game to be minimized and allow this to work. Or, if while the game was running in fullscreen, that I was able to use SendMessage or PostMessage to type text into a Command Prompt Window.
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Jun 7, 2011
I have already asked about the problem in java forum.Now i think the solution is only possible through microsoft products.Problem is i want to get the handle of a application and send commands to that application.Is it possible commands are send to combo box , text area, buttons etc..
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Jan 26, 2011
How can I send data from a C++ application to a VB application?Or the other way around, read with VB the data from de C++ application.Is it possible like a setvalue or getvalue command?
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Dec 14, 2010
I've to send SMS from My web Application (I'm using ASP.NET VB). My SMS API is on .php site. Here is a Sample.
[Code]....
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Sep 3, 2009
I want 2 send a sms through vb6 application ,i want to know the possible options.
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May 28, 2009
I want to send SMS by windows application. I ran the code but I got an error. This is
AT
OK AT+CMGF=1
OK AT+CSCA="+9460921985"
[code]......
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Jul 13, 2011
I have a solution, which has two projects.Project A generates an executable. Project B generates a dll,which is used by the executable. This project I downloaded from CodeProject site, and it worked very well.[code]...
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Feb 1, 2011
how i could send an email from within a vb application?
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Jul 28, 2011
I'm trying to send a simple plain-text email through my VB.net web application.[url]...
But, regardless of what email addresses I use, I keep getting the message "unable to connect to the remote server".[code]...
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