TaskDialog shows Chinese text instead of en-us

If the TaskDialog in your application is displaying Chinese text instead of English (en-us), it's likely that the localization settings on your system are causing this behavior. TaskDialog automatically picks the appropriate language based on the user's locale and system settings.

To force the TaskDialog to display in English (en-us) regardless of the system's locale, you can set the dwFlags parameter of the TaskDialogOptions structure to include the TDF_USE_COMMAND_LINKS_FOR_BUTTONS flag. This flag is not dependent on the system's locale and will ensure that the TaskDialog displays in English.

Here's an example of how to create a TaskDialog with the TDF_USE_COMMAND_LINKS_FOR_BUTTONS flag:

csharpCopy code
using System;

using System.Runtime.InteropServices;



class Program

{

    // Import the required functions from the Windows API

    [DllImport("Comctl32.dll", CharSet = CharSet.Unicode, PreserveSig = false)]

    public static extern void TaskDialogIndirect(ref TASKDIALOGCONFIG pTaskConfig, out int pnButton, out int pnRadioButton, [MarshalAs(UnmanagedType.Bool)] out bool pfVerificationFlagChecked);



    // Define the TaskDialogOptions structure

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

    public struct TASKDIALOGCONFIG

    {

        public uint cbSize;

        public IntPtr hwndParent;

        public IntPtr hInstance;

        public TASKDIALOG_FLAGS dwFlags;

        public TASKDIALOG_COMMON_BUTTON_FLAGS dwCommonButtons;

        public string pszWindowTitle;

        // Add other properties as needed for your TaskDialog

    }



    // Define the TaskDialog flags

    [Flags]

    public enum TASKDIALOG_FLAGS : uint

    {

        TDF_ENABLE_HYPERLINKS = 0x0001,

        TDF_USE_HICON_MAIN = 0x0002,

        TDF_USE_HICON_FOOTER = 0x0004,

        TDF_ALLOW_DIALOG_CANCELLATION = 0x0008,

        TDF_USE_COMMAND_LINKS_FOR_BUTTONS = 0x0010,

        TDF_USE_COMMAND_LINKS = 0x0020,

        TDF_EXPAND_FOOTER_AREA = 0x0040,

        TDF_EXPANDED_BY_DEFAULT = 0x0080,

        TDF_VERIFICATION_FLAG_CHECKED = 0x0100,

        TDF_SHOW_PROGRESS_BAR = 0x0200,

        TDF_SHOW_MARQUEE_PROGRESS_BAR = 0x0400,

        TDF_CALLBACK_TIMER = 0x0800,

        TDF_POSITION_RELATIVE_TO_WINDOW = 0x1000,

        TDF_RTL_LAYOUT = 0x2000,

        TDF_NO_DEFAULT_RADIO_BUTTON = 0x4000,

        TDF_CAN_BE_MINIMIZED = 0x8000,

        TDF_SIZE_TO_CONTENT = 0x01000000

    }



    // Define the common button flags

    [Flags]

    public enum TASKDIALOG_COMMON_BUTTON_FLAGS : uint

    {

        TDCBF_OK_BUTTON = 0x0001,

        TDCBF_YES_BUTTON = 0x0002,

        TDCBF_NO_BUTTON = 0x0004,

        TDCBF_CANCEL_BUTTON = 0x0008,

        TDCBF_RETRY_BUTTON = 0x0010,

        TDCBF_CLOSE_BUTTON = 0x0020

    }



    static void Main()

    {

        // Create a new TaskDialogOptions structure and set the properties as needed

        TASKDIALOGCONFIG taskDialogConfig = new TASKDIALOGCONFIG

        {

            cbSize = (uint)Marshal.SizeOf(typeof(TASKDIALOGCONFIG)),

            hwndParent = IntPtr.Zero,

            hInstance = IntPtr.Zero,

            dwFlags = TASKDIALOG_FLAGS.TDF_USE_COMMAND_LINKS_FOR_BUTTONS, // Use this flag to force English (en-us) text

            dwCommonButtons = TASKDIALOG_COMMON_BUTTON_FLAGS.TDCBF_OK_BUTTON,

            pszWindowTitle = "Task Dialog Example",

            // Add other properties as needed for your TaskDialog

        };



        // Call TaskDialogIndirect to display the TaskDialog

        TaskDialogIndirect(ref taskDialogConfig, out _, out _, out _);

    }

}

By using the TDF_USE_COMMAND_LINKS_FOR_BUTTONS flag, you can ensure that the TaskDialog displays in English (en-us) even if the system's locale is set to Chinese or any other language. Modify the TASKDIALOGCONFIG structure and other properties as needed for your specific TaskDialog.