从系统托盘中的图标获取工具提示文本

我正在尝试从系统托盘中读取不属于我自己的应用程序的ToolTip文本。 基本上我所说的将是提取一些状态信息的最简单方法。

使用C＃提取ToolTip文本最简单的方法是什么？

Answer 1

让我们从找到systray窗口句柄开始：

[DllImport("user32.dll", SetLastError = true)] static extern IntPtr FindWindowEx(IntPtr hWndParent, IntPtr hWndChildAfter, string lpClassName, string lpWindowName); [DllImport("user32.dll", SetLastError = true)] static extern IntPtr FindWindow(string lpClassName, string lpWindowName); static IntPtr GetSystemTrayHandle() { IntPtr hWndTray = FindWindow("Shell_TrayWnd", null); if (hWndTray != IntPtr.Zero) { hWndTray = FindWindowEx(hWndTray, IntPtr.Zero, "TrayNotifyWnd", null); if (hWndTray != IntPtr.Zero) { hWndTray = FindWindowEx(hWndTray, IntPtr.Zero, "SysPager", null); if (hWndTray != IntPtr.Zero) { hWndTray = FindWindowEx(hWndTray, IntPtr.Zero, "ToolbarWindow32", null); return hWndTray; } } } return IntPtr.Zero; } 

Systray窗口是一个工具栏类，您需要获取单个图标的信息：

  private static unsafe bool GetTBButton(IntPtr hToolbar, int i, ref TBBUTTON tbButton, ref string text, ref IntPtr ipWindowHandle) { // One page const int BUFFER_SIZE = 0x1000; byte[] localBuffer = new byte[BUFFER_SIZE]; UInt32 processId = 0; UInt32 threadId = User32.GetWindowThreadProcessId(hToolbar, out processId); IntPtr hProcess = Kernel32.OpenProcess(ProcessRights.ALL_ACCESS, false, processId); if (hProcess == IntPtr.Zero) { Debug.Assert(false); return false; } IntPtr ipRemoteBuffer = Kernel32.VirtualAllocEx( hProcess, IntPtr.Zero, new UIntPtr(BUFFER_SIZE), MemAllocationType.COMMIT, MemoryProtection.PAGE_READWRITE); if (ipRemoteBuffer == IntPtr.Zero) { Debug.Assert(false); return false; } // TBButton fixed (TBBUTTON* pTBButton = &tbButton) { IntPtr ipTBButton = new IntPtr(pTBButton); int b = (int)User32.SendMessage(hToolbar, TB.GETBUTTON, (IntPtr)i, ipRemoteBuffer); if (b == 0) { Debug.Assert(false); return false; } // this is fixed Int32 dwBytesRead = 0; IntPtr ipBytesRead = new IntPtr(&dwBytesRead); bool b2 = Kernel32.ReadProcessMemory( hProcess, ipRemoteBuffer, ipTBButton, new UIntPtr((uint)sizeof(TBBUTTON)), ipBytesRead); if (!b2) { Debug.Assert(false); return false; } } // button text fixed (byte* pLocalBuffer = localBuffer) { IntPtr ipLocalBuffer = new IntPtr(pLocalBuffer); int chars = (int)User32.SendMessage(hToolbar, TB.GETBUTTONTEXTW, (IntPtr)tbButton.idCommand, ipRemoteBuffer); if (chars == -1) { Debug.Assert(false); return false; } // this is fixed Int32 dwBytesRead = 0; IntPtr ipBytesRead = new IntPtr(&dwBytesRead); bool b4 = Kernel32.ReadProcessMemory( hProcess, ipRemoteBuffer, ipLocalBuffer, new UIntPtr(BUFFER_SIZE), ipBytesRead); if (!b4) { Debug.Assert(false); return false; } text = Marshal.PtrToStringUni(ipLocalBuffer, chars); if (text == " ") text = String.Empty; } Kernel32.VirtualFreeEx( hProcess, ipRemoteBuffer, UIntPtr.Zero, MemAllocationType.RELEASE); Kernel32.CloseHandle(hProcess); return true; } 

现在，您所要做的就是遍历按钮并获取数据：

  IntPtr _ToolbarWindowHandle = GetSystemTrayHandle(); UInt32 count = User32.SendMessage(_ToolbarWindowHandle, TB.BUTTONCOUNT, 0, 0); for (int i = 0; i < count; i++) { TBBUTTON tbButton = new TBBUTTON(); string text = String.Empty; IntPtr ipWindowHandle = IntPtr.Zero; bool b = GetTBButton(_ToolbarWindowHandle, i, ref tbButton, ref text, ref ipWindowHandle); } 

Answer 2

如果有人遇到这个线程并且有相同的需求，我发布了一个线程，询问如何正确实现代码示例并获得了很多帮助，以及一个有用的解决方案：

使用PInvoke声明实现代码示例时遇到问题