Using Sendkeys/sendmessage?
Aug 14, 2010
I'm trying to send some words to an application I'm running (exe file, no webpage). To do this I run my vb program and minimize it, so that the application I want to send the words to have focus.Now I've tried sendkeys, but it seems sendkeys only sends my first word and does nothing with the other words. The code below is called 4 times by the main form
If i > 3 Then i = 0
i = i + 1
If i = 1 Then verhaal ="some text 1"[code]....
but this throws in a overflowexception was unhandled error at the apiSendMessage(hWnd, WM_SETTEXT, 0, "Hello") line.I've tried several things but I can't figure it out how to send multiple words to the application without problems .
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Jul 28, 2009
What is the difference between SendKeys.SendWait and SendKeys.Send?Send obviously will just send they key immediately, but does SendWait actually wait for the message to be processed or does it also send it immediately?The function's name itself is just confusing. Which one should I use if I want to send keystrokes to a 3rd party app immediately, or is there no difference? To me, a few milliseconds is a big difference.
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Jul 2, 2010
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
CheckBox1.Checked = True
While CheckBox1.Checked = True
SendKeys("{END}")
End While
End Sub
That is the code, the error is "SendKeys is a type and cannot be used as an expression."
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Dec 1, 2009
I'm looking for the underlying Win32 API call that the DotNET Framework invokes on a SendKeys.Send or .SendWait call, or a Win32 API Equivalent to SendKeys. I've already experimented with SetKeyboardState which seems like the way to go, except that it does not raise any kind of keyboard event that causes the set keystates to register with an active application or the OS (at least not until another key is pressed; for example I can meddle with the keyboardstate before events process on a natural keystroke, but I can't invoke a keystroke programmatically).
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Dec 27, 2006
I have a VB.Net 2.0 application, on my form I am using a Component ONE PDF reader control.I am trying to send to this control a F4 keystoke to close the navigation panel when it opens the PDF file. It is not working or not accepting the sendkey.I put focus on the control first. Code below:
Me.PDF1.Focus()
Me.PDF1.Select()
My.Computer.Keyboard.SendKeys("{F4}", True)
I have tried different variations of the Sendkeys with no success.
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Aug 16, 2010
When using Sendkeys with vb.net, is it possible to tell if the target of the Sendkeys has changed between sendings?
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Aug 24, 2010
CODE:
Whats wrong with this code? There is no error. But nothing happens when exicuted.
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Mar 24, 2010
[code].....
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Sep 26, 2011
I am using SendMessageTimeout to send messages (IPC) to talk between applications ... works fine in vb... but i am trying to build a vb.net implementation to talk between existing vb6 apps and .net ones...
So far i can successfully send data from vb.net to vb6 using:
vb
Dim b = System.Text.UnicodeEncoding.ASCII.GetBytes(Command)
Dim Data As New COPYDATASTRUCT
Data.dwData = New IntPtr
Data.cdData = UBound(b) + 1
[Code]...
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Oct 13, 2011
I would like to get the x, y position from the Params when the WM_LBUTTONDOWN is sent in vb.net.I got this to make the param but how do I get the position from it.
IntPtr lParam = (IntPtr)((y << 16) | x);
My function:
Protected Overrides Sub WndProc(ByRef m As Message)
Select Case m.Msg
Case WM_LBUTTONDOWN
[code]....
Update: I just tried this and it works perfectly.
Dim pos As New System.Drawing.Point(CInt(m.LParam))
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Feb 23, 2011
Private Const WM_KEYDOWN = &H100
Private Const WM_KEYUP = &H101
Private Const VK_BACKSPACE = &H8
[code].....
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Jul 27, 2009
I have this code:
Private Const MOUSEEVENTF_LEFTDOWN = &H2
Private Const MOUSEEVENTF_LEFTUP = &H4
Dim WindowHandle As Long = FindWindow(vbNullString, "Ultima Online")
SendMessage(WindowHandle, MOUSEEVENTF_LEFTDOWN, 0, 0)
SendMessage(WindowHandle, MOUSEEVENTF_LEFTUP, 0, 0)
I know it is getting the windowhandle fine, because I made a conditional statment that pops up a messagebox if windowhandle = 0 The problem is that it is not sending the mouse click to the window.
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Feb 25, 2010
[URL]
Damned. Is there a managed code somewhere in vb.net where mortals can simulate key presses?
Is there an e-book or book somewhere about it?
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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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Mar 24, 2010
Ive been trying to figure out how to sendmessage VK_Space. i found an example and just tried it how it was, but i always get an error.My code
Public Class Form1
Private Declare Function PostMessage Lib "user32" Alias "PostMessageA" (ByVal hwnd As IntPtr, ByVal wMsg As IntPtr, ByVal wParam As Long, ByVal lParam As IntPtr) As IntPtr
[code].....
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Jul 26, 2009
bear in mind i am pretty new to thisnow "Ultima Online" is the title of the window/game im trying to send a simple mouseclick to..
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Nov 30, 2009
I use keybd_event and mouse_event to simulate keypresses. I want taht to still work when the user is switch (Xp supports several users as we know).
Well, it doesn't.
I've heard sendmessage is more reliable,.
I manage to simulate click easily.
SimulateClick2 = SendMessage(hwnd, BM_CLICK, 0, 0)
Now, how to do so to simulate keypresses?
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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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Jun 20, 2011
I can't seem to get my program to send anything to this text box. I am able to receive the handles of each object, but never able to send to it.
Here is my code.
vb.net
Public Const WM_SETTEXT = &HC
Public Const WM_KEYDOWN = &H100
[code]....
It wont even set focus.I have the right amount of tiers ... perhaps im in need of the use of GetControl?
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Jun 14, 2012
I am Automating IBM iSeries Emulators using VB.net, created GUI that embeds the external iSeries Emulator Window in a WindowsForm Panel using the "SetParent" API .. To communicate with the iSeries Window I use the SendMessage API to send Key's to the Screen. I am aware of the sendkeys.keys in .net, but this way I dont have to SetForegroundWindow and reactivate my Form.
[Code]...
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Nov 26, 2009
I developed a little app which uses SendMessage function to turn off monitor. My friend asked me whether using the app regularly will harm his monitor. He had some issues with his mother board when he used a similar app. Is there any harm (for hardware) in using the function to do things like these?
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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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Jan 26, 2012
I need an API for sendmessage and sendmessagetimeout for my VB .net application. I have searched quite a bit, and everything I find doesn't seem to work: either the message just doesnt seem to be sent, or the message appears to be sent with the msg parameter always 0, and the wparam setting as what I enter for the msg setting. Pinvoke's also always seems to throw an AccessViolationException for I have no idea what reason. I tried playing around with maybe just where I put the variable, but unsurprisingly, there is not a simple logical switch of the variables.I have tried pinvoke's:
<DllImport("user32.dll", SetLastError:=True)> _
Public Shared Function SendMessageTimeout(ByVal windowHandle As IntPtr, ByVal Msg As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr, ByVal flags As
[code].....
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May 18, 2009
I am currently writing a program that must extract data from the screen of another application. This application is a client side database interface. When the client retrieves data from the database it is displayed on this form. I am currently using.
[Code]...
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Apr 19, 2009
i have read around 500 websites/forum posts about this already (felt like 500 :)) but i _never_ got it to work.i'm trying to click on a specific position in a background window.. like when notepad, another app or a game is minimized.this is the code i've got now.. (just parts of it, i have a lot more but its commented and not working either):
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, _
ByVal wParam As Long, ByVal lParam As Long) As Long
Dim DaWord As Long
DaWord = MakeDWord(800, 600)
[code]....
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Dec 9, 2011
Example I would want my program. To press a button on a window. Like notepad.exe I already know how to get the window handel and call gettext or send. To the edit textbox. But how would a preform a click event? I think its called child class? Say I wanted to click the fille button. How would I start ? I know how to get the name threw spy++ but am not sure how to sendmessage to the button.
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Apr 24, 2007
I am trying to get the position and text of all DeskTop icons, by sending a SendMessage to the desktop's listview, using LVI_GETITEMTEXT. Works oke on 32 bits, but on 64-bits I always get an empty string back. I also tried to do this using LVI_GET_ITEM< but the same result. No errors, but also no text string. (I do get the x,y position of the icon). What is wrong here?
[Code]...
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Feb 1, 2009
another problem related to what I posted earlier but a different problem. I've got the open window list and all that, now I'm trying to get icons from the windows... but the only window that I can get to return an Icon is internet explorer?
[Code]...
I know all the variables are set correctly since obviously it can get Internet Explorer's icon, but I can't figure out a way to get icons from any of the other windows. I've tried ICON_SMALL BIG and SMALL2
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Dec 20, 2010
how to type a hello word in notepad using sendmessage? i just want to write a simple word like "hello" in notepad and also, what is the difference between sendmessage , postmessage and keybd_event, etc?
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Aug 7, 2009
I have read numerous postings but this is my first contribution. I am trying to use Sendmessage to send a string of text from one application to another. I have created a sandbox to work out the details. I have used the Notepad example and I have gotten that to function. This is what I have that works.
[Code]...
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