Simulate Mouse Click

Hey guys, i've been messing around with this and can't find out whats wrong with it X_x


public class Win32APICall
{
[DllImport("user32.dll", EntryPoint = "mouse_event")]
public static extern void mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);

public const int MOUSEEVENTF_LEFTDOWN = 0x02;
public const int MOUSEEVENTF_LEFTUP = 0x04;
public const int MOUSEEVENTF_RIGHTDOWN = 0x08;
public const int MOUSEEVENTF_RIGHTUP = 0x10;
}

private void button1_Click(object sender, EventArgs e)
{
Win32APICall.mouse_event(Win32APICall.MOUSEEVENTF_LEFTDOWN, 544, 472, 0, 0);
Win32APICall.mouse_event(Win32APICall.MOUSEEVENTF_LEFTUP, 544, 472, 0, 0);
}


I click the button, and the mouse stays in the exact same spot. I'm trying to get it to click a link that's in a webbrowser on the form. I checked coordinates, they are right. I tried a whole bunch of times, nothing changes in there. There are no errors either. Any ideas? Thx.

call the button's PerformClick method.

private void button1_Click(object sender, EventArgs e)
{
//CursorPos.SetCursorPos(544, 472);
Win32APICall.mouse_event(Win32APICall.MOUSEEVENTF_LEFTDOWN, 544, 472, 0, 0);
Win32APICall.mouse_event(Win32APICall.MOUSEEVENTF_LEFTUP, 544, 472, 0, 0);
button1.PerformClick();
}


now has an error on the button1.performclick(); method. "An unhandled exception of type 'System.StackOverflowException' occurred in System.Windows.Forms.dll". Any ideas? =(

Dude.. what do you expect if you call PerformCLick() inside the click handler for the button youre PerformCLick()ing? :):)


Its like this:

Code:

---

  public void makeStackOverflow(){
    makeStackOverflow();
  }

---

incidentally, it sounds like youre having a button somewhere and when you click that button you want to programmatically move the mouse so it is hovering over a link in a webbrowser control and then click the mouse so that the web browser thinks the user clicked the link...

my question is, why bother? why not just grab the URL the link points to and tell the web browser to navigate() to it?

Lol. It's starting with a button, and later I will just turn it into a sub (or whatever they call it in C#). It's sort of a cheat for a game over the net, so I need it to auto click certain places. For now im just worrying about how to get it to click, later I will set those places and have it automatic instead of a button. Also, it's not a link, it's one of those games where you click somewhere and the guy moves there. Anyways, I tried to use button1.PerformClick(); in the form1_load... No error, but nothing happens like earlier. Also, I added that thing you wrote, and still nothing. =(

*Bump* Any suggestions guys? =( Still can't get it to work.

and again, i say you should put a WebBrowser control on the form, load the game webpage in it and then you can inspect the document and navigate round to your hearts content - youre making things too much harde rthan you need to, because youre trying nto make a computer behave like a human

Ya I have the webbrowers on the form already. But need it to simulate what a real person would do for it to work. I made this before with VB 6.0, worked fine, but I wanted to make another version for C# .Net.

Aright I tried

[DllImport("user32.dll")]
public static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, UIntPtr wParam,
IntPtr lParam);
public const int MOUSEEVENTF_LEFTDOWN = 0x02;
public const int MOUSEEVENTF_LEFTUP = 0x04;




Win32APICall.SendMessage(Handle, Win32APICall.MOUSEEVENTF_LEFTDOWN,UIntPtr.Zero, IntPtr.Zero);
Win32APICall.SendMessage(Handle, Win32APICall.MOUSEEVENTF_LEFTUP, UIntPtr.Zero, IntPtr.Zero);



But it just immediatly closes the project after clicking the button. No error or anything, just closes it. Mouse doesn't move either. Any ideas?

Quote:

---

Originally Posted by MadHatter

call the button's PerformClick method.

---

^^^ you're sending a message that's already wrapped in the above method...

Ya so I tried putting that in the form_load. All that happens is the form pops up and closes right away. So I just commented it out. Also tried the

public void makeStackOverflow()
{
makeStackOverflow();
}

And used it right after the PerformClick(), and it says theres an error with an infinate loop.

if you're clicking a button, then use the method.

if you need to click on a particluar place on the form then use send message to send a WM_LBUTTONDOWN notification with the exact x/y location you should click. also you should send it to the control you're wanting to click on and not to the main form. if you have a web browser control, then try using its handle when you call it.



whatever you do, dont have an event handler for your button click event, that p/invokes another button click on the same button you are handling the click event with another click invoker.

I dont understand how thats not absolutely clear by this point.

the makeStackOverflow() was humor pointed at you for recursively calling the same thing over and over and over and over and over again. perform click, sends the send message for a button click. when a button is clicked it calls the Click event handler in which you put the send message notification to click the button that you just clicked. so by clicking your button you start an infinite kludge of notifications being generated.

Quote:

---

Originally Posted by JBudOner

Ya so I tried putting that in the form_load. All that happens is the form pops up and closes right away. So I just commented it out. Also tried the

public void makeStackOverflow()
{
makeStackOverflow();
}

And used it right after the PerformClick(), and it says theres an error with an infinate loop.

---

:D LOL :D This is the most funny optimization I've ever heard of!

=/


[DllImport("user32.dll")]
public static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, UIntPtr wParam,
IntPtr lParam);

public const int WM_NCLBUTTONDOWN =0x00A1;
public const int WM_NCLBUTTONUP = 0x00A2;



private void button1_Click(object sender, EventArgs e)
{
Win32APICall.SendMessage(Web.Handle, Win32APICall.WM_NCLBUTTONDOWN, 544, 472);
Win32APICall.SendMessage(Web.Handle, Win32APICall.WM_NCLBUTTONUP, 544, 472);
}




So this is what I came out to now. Web being the name of the WebBrowser. Not sure if, 'WM_LBUTTONDOWN' is different from, 'WM_NCLBUTTONDOWN'. I checked around for a number that it would be, but couldn't find any. I've got an error when trying to run it, "Cannot convert from 'int' to 'System.UIntPtr'," and, "Cannot convert form 'int' to 'System.IntPtr'." I've got one of both of these for both the SendMessages. Any ideas?

Quote:

---

Originally Posted by JBudOner

=/


[DllImport("user32.dll")]
public static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, UIntPtr wParam,
IntPtr lParam);

public const int WM_NCLBUTTONDOWN =0x00A1;
public const int WM_NCLBUTTONUP = 0x00A2;



private void button1_Click(object sender, EventArgs e)
{
Win32APICall.SendMessage(Web.Handle, Win32APICall.WM_NCLBUTTONDOWN, 544, 472);
Win32APICall.SendMessage(Web.Handle, Win32APICall.WM_NCLBUTTONUP, 544, 472);
}




So this is what I came out to now. Web being the name of the WebBrowser. Not sure if, 'WM_LBUTTONDOWN' is different from, 'WM_NCLBUTTONDOWN'. I checked around for a number that it would be, but couldn't find any. I've got an error when trying to run it, "Cannot convert from 'int' to 'System.UIntPtr'," and, "Cannot convert form 'int' to 'System.IntPtr'." I've got one of both of these for both the SendMessages. Any ideas?

---

'WM_LBUTTONDOWN' is different from 'WM_NCLBUTTONDOWN'! First means "window message left button down" and second means "window message non-client area left button down"! In my oppinion, it might be useless to send any of these messages to a window in order to hit a hyperlink within it. You could try detecting which message is processed when the hyperlink is hit by using something like Spy++, 'cause might not be WM_LBUTTONDOWN & WM_LBUTTONUP but also to idetify what parameters are expected when these messages are sent. I would recommend SendInput() for sending keyboard or mouse events. Also, I have used in the past mouse_event to simulate mouse events and I find it strange that doesn't work for you.
Regards,

Great =) I tried SendInput() and it worked now. Heres what I put:


public class Win32APICall
{
public const int INPUT_MOUSE = 0;
public const int MOUSEEVENTF_LEFTDOWN = 0x0002;
public const int MOUSEEVENTF_LEFTUP = 0x0004;



[DllImport("User32.dll", SetLastError = true)]
public static extern int SendInput(int nInputs, ref INPUT pInputs, int cbSize);

public struct INPUT
{
public int type;
public MOUSEINPUT mi;
}

public struct MOUSEINPUT
{
public int dx;
public int dy;
public int mouseData;
public int dwFlags;
public int time;
public int dwExtraInfo;
}
}



private void Updater_Tick(object sender, EventArgs e)
{
Win32APICall.MOUSEINPUT aInput;
aInput.dx = 544;
aInput.dy = 472;
aInput.time = 0;
aInput.mouseData = 0;
aInput.dwExtraInfo = 0;
aInput.dwFlags = Win32APICall.MOUSEEVENTF_LEFTDOWN;
Win32APICall.INPUT bInput;
bInput.type = 0;
bInput.mi = aInput;
Win32APICall.SendInput(1, ref bInput, 28);
aInput.dwFlags = Win32APICall.MOUSEEVENTF_LEFTUP;
bInput.mi = aInput;
Win32APICall.SendInput(1, ref bInput, 28);
}



Thanks very much everyone, I really appreciate the help.

To those who were curious why im trying to autoclick a link in a website: Im not. There is a game in which you have to click on the screen to move your character at that position, and do different things in the game. I want to make an, 'auto' and therefor need it to autoclick for me. This is just the start, im not going to keep it on a timer, im going to make it a void and call it everytime there are two colors that match (in an xml and on the game).



One thing I didn't get though is that it didn't change the x and y position of the mouse. It just simply auto clicks everytime the interval is hit on the timer.

Quote:

---

Originally Posted by JBudOner

One thing I didn't get though is that it didn't change the x and y position of the mouse. It just simply auto clicks everytime the interval is hit on the timer.

---

SendInput does not change mouse position. It inserts events in the queue that are processed by OS and messages are dispatched to corresponding windows from all processes. The mouse coordinates that you store as event parameters might not be used by the application receiving the message. Many application are retrieving cursor position with GetCursorPos instead of using the parameters of the message received (because they want the last position, in case there's lag between send & receive). In order to change mouse pointer position, call SetCursorPos() API. Then you can use SendInput to insert buttons' events.
PS: There're some applications (some games in particular) that do not process mouse events through windows messages, which makes SendInput or mouse_event APIs useless. Those applications poll themself the state of the device directly from the driver. In such case you'll need to patch its Import Address Table (IAT) to call a stub function of yours that changes device's behaviour as you wish.
PPS: Using a timer might be unhealty, ... instead, I'd rather use the status of a "special key" like SCROLL_LOCK to know if clicks should be performed by my code.
Best regards,