NativeWinAlert

using System;
using System.Runtime.InteropServices;

// DISCLAIMER: All comments and summaries in this code were added by ChatGPT, the AI assistant.
// I made this from Roy de Jong's script https://gist.github.com/roydejong/130a91e1835154a3acaeda78c9dfbbd7 (with help from ChatGPT)

/// <summary>
/// A class to display Windows MessageBox dialogs using the native Windows API.
/// For more details on MessageBox usage, see:
/// <see>https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-messagebox</see>
/// </summary>
public class WinMsgBox
{
    // Import the MessageBox function from the user32.dll library,
    // which is used to display a message box on Windows.
    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
    static extern int MessageBox(IntPtr hwnd, string lpText, string lpCaption, uint uType);

    /// <summary>
    /// Enum to specify the icon to be displayed in the message box.
    /// </summary>
    [Flags]
    public enum WinMsgIcon
    {
        None = 0x00000000,        // No icon
        Error = 0x00000010,       // Displays an error icon (MB_ICONERROR)
        Warning = 0x00000030,     // Displays a warning icon (MB_ICONEXCLAMATION)
        Information = 0x00000040, // Displays an information icon (MB_ICONASTERISK)
        Question = 0x00000020     // Displays a question icon (MB_ICONQUESTION)
    }

    /// <summary>
    /// Enum to specify the buttons and behavior of the message box prompt.
    /// </summary>
    [Flags]
    public enum WinMsgPrompt : long
    {
        CancelRetryContinue = 0x00000006L,  // Displays Cancel, Retry, and Continue buttons
        Help = 0x00004000L,                 // Displays a Help button
        Ok = 0x00000000L,                   // Displays only an Ok button
        OkCancel = 0x00000001L,             // Displays Ok and Cancel buttons
        RetryCancel = 0x00000005L,          // Displays Retry and Cancel buttons
        YesNo = 0x00000004L,                // Displays Yes and No buttons
        YesNoCancel = 0x00000003L           // Displays Yes, No, and Cancel buttons
    }

    /// <summary>
    /// Displays a message box with the specified message, caption, icon, and prompt buttons.
    ///
    /// Note: The 'prompt' parameter is provided for completeness, but since this method does
    /// not return any button pressed information, it would be most appropriate to use 'WinMsgPrompt.Ok'
    /// as the button type. Other button configurations won't affect the result in this case.
    /// </summary>
    /// <param name="message">The text to display in the message box.</param>
    /// <param name="caption">The title of the message box.</param>
    /// <param name="icon">The icon to be displayed (e.g., Information, Error, etc.).</param>
    /// <param name="prompt">The prompt buttons to be displayed (e.g., Ok, Yes/No, etc.).</param>
    public static void WinAlert(string message = "", string caption = "", WinMsgIcon icon = WinMsgIcon.None, WinMsgPrompt prompt = WinMsgPrompt.Ok)
    {
        // Combine the icon and prompt values into a single uint for the MessageBox function
        uint uType = (uint)icon | (uint)prompt;

        // Call the MessageBox function to display the message box with the provided parameters
        MessageBox(IntPtr.Zero, message, caption, uType);
    }

    /// <summary>
    /// Displays a message box with the specified message, caption, icon, and prompt buttons.
    /// This method returns the string name of the button pressed by the user.
    /// The possible button names are:
    /// 'Ok', 'Cancel', 'Abort', 'Retry', 'Ignore', 'Yes', 'No', 'Try Again', 'Continue'.
    ///
    /// Note: If the user clicks the "X" (close button) to close the message box, it will be counted as
    /// pressing the **Cancel** button, even if the actual Cancel button is not present in the message box.
    /// If the MessageBox function fails (returns 0), the method will return "Error".
    /// </summary>
    /// <param name="message">The text to display in the message box.</param>
    /// <param name="caption">The title of the message box.</param>
    /// <param name="icon">The icon to be displayed (e.g., Information, Error, etc.).</param>
    /// <param name="prompt">The prompt buttons to be displayed (e.g., Ok, Yes/No, etc.).</param>
    /// <returns>A string representing the button pressed by the user, or an error message if MessageBox fails.</returns>
    public static string WinAlertOutput(string message = "", string caption = "", WinMsgIcon icon = WinMsgIcon.None, WinMsgPrompt prompt = WinMsgPrompt.Ok)
    {
        // Combine the icon and prompt values into a single uint for the MessageBox function
        uint uType = (uint)icon | (uint)prompt;

        // Call the MessageBox function to display the message box and capture the button pressed
        int result = MessageBox(IntPtr.Zero, message, caption, uType);

        // Check if the MessageBox call failed (returns 0)
        if (result == 0)
        {
            return "Error: MessageBox failed to display.";
        }

        // Convert the result (integer) into a string representation of the button pressed
        return GetButtonName(result);
    }

    /// <summary>
    /// Converts the integer return value from MessageBox into a string representing the button pressed.
    /// </summary>
    /// <param name="result">The integer result returned from MessageBox.</param>
    /// <returns>The string name of the button pressed.</returns>
    private static string GetButtonName(int result)
    {
        switch (result)
        {
            case 1: return "Ok";
            case 2: return "Cancel";
            case 3: return "Abort";
            case 4: return "Retry";
            case 5: return "Ignore";
            case 6: return "Yes";
            case 7: return "No";
            case 10: return "Try Again";
            case 11: return "Continue";
            default: return "Unknown"; // In case the return value is unexpected
        }
    }
}