Get Win32 legacy control's tooltip text programmatically in C#

Get Win32 legacy control's tooltip text programmatically in C#

To get a Win32 legacy control's tooltip text programmatically in C#, you can use the SendMessage method from the System.Runtime.InteropServices namespace to send a TTM_GETTEXT message to the tooltip control. Here's an example code snippet:

using System; using System.Runtime.InteropServices; using System.Windows.Forms; public class MyForm : Form { private const int TTM_GETTEXT = 0x0400 + 56; // TTM_GETTEXT = WM_USER + 56 [DllImport("user32.dll", CharSet = CharSet.Unicode)] private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam); public MyForm() { InitializeComponent(); } private void MyForm_Load(object sender, EventArgs e) { // Get the tooltip text for a control string tooltipText = GetTooltipText(myControl.Handle); } private string GetTooltipText(IntPtr controlHandle) { // Get the handle of the tooltip control for the specified control IntPtr tooltipHandle = SendMessage(controlHandle, TTM_GETTOOLINFO, IntPtr.Zero, IntPtr.Zero); // Create a buffer to hold the tooltip text const int MAX_TEXT_LENGTH = 1024; IntPtr buffer = Marshal.AllocHGlobal(MAX_TEXT_LENGTH * 2); // Send the TTM_GETTEXT message to the tooltip control to retrieve the text SendMessage(tooltipHandle, TTM_GETTEXT, new IntPtr(MAX_TEXT_LENGTH), buffer); // Convert the buffer to a string and free the buffer memory string tooltipText = Marshal.PtrToStringUni(buffer); Marshal.FreeHGlobal(buffer); return tooltipText; } }

In this example, we define a MyForm class that inherits from the Form class. We override the Load method to demonstrate how to get the tooltip text for a control.

To get the tooltip text, we define a GetTooltipText method that takes the handle of the control whose tooltip text we want to retrieve. We use the SendMessage method with the TTM_GETTOOLINFO message to get the handle of the tooltip control for the specified control. We then allocate a buffer to hold the tooltip text and use the SendMessage method with the TTM_GETTEXT message to retrieve the text from the tooltip control. Finally, we convert the buffer to a string and free the buffer memory before returning the tooltip text.

Note that this code assumes that the control has a tooltip associated with it and that the tooltip control is a child window of the control's parent window. If the control does not have a tooltip associated with it, or if the tooltip control is not a child window of the control's parent window, this code may not work correctly.

Examples

  1. "C# get tooltip text of a Win32 control using SendMessage"

    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] static extern IntPtr SendMessage(IntPtr hWnd, uint msg, IntPtr wParam, StringBuilder lParam); const uint WM_GETTEXT = 0x000D; // Get tooltip text of a control with handle 'hWnd' StringBuilder tooltipText = new StringBuilder(256); SendMessage(hWnd, WM_GETTEXT, new IntPtr(tooltipText.Capacity), tooltipText); // Use 'tooltipText.ToString()' here
    • Description: Uses SendMessage with WM_GETTEXT to retrieve the tooltip text of a Win32 control.

  2. "C# get tooltip text of Win32 control using GetWindowText"

    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount); // Get tooltip text of a control with handle 'hWnd' StringBuilder tooltipText = new StringBuilder(256); GetWindowText(hWnd, tooltipText, tooltipText.Capacity); // Use 'tooltipText.ToString()' here
    • Description: Utilizes GetWindowText to retrieve the tooltip text of a Win32 control.

  3. "C# get tooltip text of Win32 control using ToolTip Control"

    // Assuming 'toolTip1' is a ToolTip control associated with the Win32 control string tooltipText = toolTip1.GetToolTip(win32Control); // Use 'tooltipText' here
    • Description: Retrieves the tooltip text using a ToolTip control associated with the Win32 control.

  4. "C# get tooltip text of Win32 control using GetDlgItem"

    [DllImport("user32.dll", CharSet = CharSet.Auto)] static extern IntPtr GetDlgItem(IntPtr hDlg, int nIDDlgItem); const int IDC_WIN32_CONTROL = 1234; // Replace with the actual control ID // Get tooltip text of Win32 control with dialog handle 'hDlg' IntPtr win32ControlHandle = GetDlgItem(hDlg, IDC_WIN32_CONTROL); StringBuilder tooltipText = new StringBuilder(256); GetWindowText(win32ControlHandle, tooltipText, tooltipText.Capacity); // Use 'tooltipText.ToString()' here
    • Description: Uses GetDlgItem to obtain the handle of the Win32 control and then retrieves the tooltip text.

  5. "C# get tooltip text of Win32 control using UI Automation"

    AutomationElement win32ControlElement = AutomationElement.FromHandle(win32Control.Handle); string tooltipText = ToolTipHelper.GetToolTipText(win32ControlElement); // Use 'tooltipText' here
    • Description: Uses UI Automation to retrieve the tooltip text of the Win32 control.

  6. "C# get tooltip text of Win32 control using GetToolTipText function"

    string tooltipText = Win32Interop.GetToolTipText(win32Control.Handle); // Use 'tooltipText' here
    • Description: Defines a custom interop method (GetToolTipText) to retrieve the tooltip text of the Win32 control.

  7. "C# get tooltip text of Win32 control using Accessibility API"

    string tooltipText = AccessibilityHelper.GetToolTipText(win32Control.Handle); // Use 'tooltipText' here
    • Description: Uses the Accessibility API to retrieve the tooltip text of the Win32 control.

  8. "C# get tooltip text of Win32 control using EnumChildWindows"

    [DllImport("user32.dll")] static extern bool EnumChildWindows(IntPtr hWndParent, EnumChildProc lpEnumFunc, IntPtr lParam); // Implement EnumChildProc delegate and use EnumChildWindows to find the tooltip text
    • Description: Defines a callback function (EnumChildProc) to be used with EnumChildWindows for enumerating child windows and extracting tooltip text.

  9. "C# get tooltip text of Win32 control using GetWindow"

    [DllImport("user32.dll")] static extern IntPtr GetWindow(IntPtr hWnd, uint uCmd); const uint GW_HWNDNEXT = 2; // Get tooltip text of a control with handle 'hWnd' IntPtr nextWindowHandle = GetWindow(hWnd, GW_HWNDNEXT); StringBuilder tooltipText = new StringBuilder(256); GetWindowText(nextWindowHandle, tooltipText, tooltipText.Capacity); // Use 'tooltipText.ToString()' here
    • Description: Uses GetWindow with GW_HWNDNEXT to get the next window in the Z order and retrieve its tooltip text.

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