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POSending Click with user32.dll, messages appear in spy++ but button isn't clicked
 

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  1. POSending Click with user32.dll, messages appear in spy++ but button isn't clicked
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    <p>I have problems with sending a Click to an application with the user32.dll. the button does not be clicked, but in spy++ the message do appear. i'm using win7 x64</p> <p>The code is written in c#:</p> <pre><code> [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern IntPtr FindWindow(string strClassName, string strWindowName); [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string lpClassName, string lpWindowTitle); [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] private static extern IntPtr SendMessage(IntPtr hwnd, uint Msg, IntPtr wParam, IntPtr lParam); [DllImport("user32.dll")] static extern IntPtr GetWindow(IntPtr hWnd, uint wCmd); // // Finds a window in the whole tree of childs for a parent window. // static IntPtr FindWindowRecursive(IntPtr hParent, string szClass, string szCaption) { IntPtr hResult = FindWindowEx(hParent, IntPtr.Zero, szClass, szCaption); if (hResult != IntPtr.Zero) return hResult; // found it // enumerate all childs and if found one that has childs go in IntPtr hChild = FindWindowEx(hParent, IntPtr.Zero, null, null); // first child if (hChild != IntPtr.Zero) { // let's enumerate do { hResult = FindWindowRecursive(hChild, szClass, szCaption); if (hResult != IntPtr.Zero) return hResult; // found it } while ((hChild = GetWindow(hChild, GW_HWNDNEXT)) != IntPtr.Zero); } return IntPtr.Zero; // no childs, so no window was found } static void Main(string[] args) { IntPtr win = FindWindow("Omnipage17_MainWnd_Class", "Unbenanntes OmniPage-Dokument 1 - OmniPage"); SetForegroundWindow(win); ShowWindowAsync(win, SW_RESTORE); IntPtr ButtonHandle = FindWindowRecursive(win, "BarButton", "c"); SetActiveWindow(win); //sEND Lbuttondown IntPtr ptr = SendMessage(ButtonHandle, 0x0201, new IntPtr(0x0001), MakeLParam(81,28)); //Thread.Sleep(10); //Mousemove ptr = SendMessage(ButtonHandle, 0x0200, new IntPtr(0x0001), MakeLParam(86,24)); //lbuttonup ptr = SendMessage(ButtonHandle, 0x0202, new IntPtr(0x0001), MakeLParam(81, 28)); //SendMessage(ButtonHandle, BM_CLICK, IntPtr.Zero, IntPtr.Zero); } </code></pre> <p>Here are the messages of spy++ of that button: <img src="https://i.stack.imgur.com/RYIh5.jpg" alt="enter image description here"></p> <p>If i send the the messages i get following: i don't if that is that problem but the lbuttondown, buttoup appears 2 times ( S + R ) and if i'm clicking it manuelly it gets 1 message (P) also tried to do it with WM_CLICK but then i have the same problem with it</p> <p><em>Edit: Using now PostMessage so spy++ shows the same messages as i click it manually, but still the button seems not to be clicked</em></p> <p><img src="https://i.stack.imgur.com/Tutyl.jpg" alt="enter image description here"></p> <hr> <p>With this library I have the same problem.</p> <p>code:</p> <pre><code>SetForegroundWindow(win); Rectangle re; GetWindowRect(ButtonHandle, out re); Cursor.Position = new Point((re.X + re.Width)/2, (re.Y + re.Height)/2); WindowsInput.InputSimulator.SimulateKeyDown(WindowsInput.VirtualKeyCode.LBUTTON); WindowsInput.InputSimulator.SimulateKeyUp(WindowsInput.VirtualKeyCode.LBUTTON); </code></pre> <p>Message are sent, but button isn't be clicked <img src="https://i.stack.imgur.com/9p5Z3.jpg" alt="enter image description here"></p> <p><strong>Edit:</strong></p> <p>thanks for that link (<a href="http://www.hanselman.com/blog/IntroducingLync2010SuperSimpleAutoAnswerVideoKioskWithFullScreen.aspx" rel="nofollow noreferrer">http://www.hanselman.com/blog/IntroducingLync2010SuperSimpleAutoAnswerVideoKioskWithFullScreen.aspx</a>), but also with this library i have the same problem :/</p> <p>code:</p> <pre><code>SetForegroundWindow(win); Rectangle re; GetWindowRect(ButtonHandle, out re); Cursor.Position = new Point((re.X + re.Width)/2, (re.Y + re.Height)/2); WindowsInput.InputSimulator.SimulateKeyDown(WindowsInput.VirtualKeyCode.LBUTTON); WindowsInput.InputSimulator.SimulateKeyUp(WindowsInput.VirtualKeyCode.LBUTTON); </code></pre> <p>Message are sent, but button isn't be clicked <img src="https://i.stack.imgur.com/9p5Z3.jpg" alt="enter image description here"></p> <p><strong>Edit2:</strong> </p> <p>Answer of user was deleted, because i posted my comment as an answer:</p> <blockquote> <p>This is not an answer, this belongs in your question. It doesn't match your code, clearly you are still posting BM_CLICK. Which is wrong, it should be sent and you should either send BM_CLICK or post the mouse messages. And you are looking at the wrong window, it is button's parent that gets the BN_CLICK notification and acts on it. Having the processs' keyboard state wrong would be a typical failure mode. – Hans Passant 18 hours ago</p> </blockquote> <p>Regarding to that, why should it be the parents windows? bcs in spy++ (screenshot below i serached for that button (Class: BarButton) and the handle i get from user32.dll is also the same as that one in spy++ <img src="https://i.stack.imgur.com/KC0t8.png" alt="enter image description here"></p>
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