.NET Framework 4.5的C＃中的对话框消息

using DialogMessage;

if (DMessage.ShowMessage(

    // Window Title
    "Window Title",

    // Main Instruction
    "Want to learn how to write your own message box?",

    // Dialog buttons
    DMessage.MsgButtons.YesNo,

    // Dialog Icons
    DMessage.MsgIcons.Question,

    // Content
    "In this project we will learn the logic necessary " +
    "to write your own dialog message box in Windows")

    // Checks DialogResult of the button clicked by user
    == DialogResult.Yes)

    // Show the Windows standard MessageBox to test result
    MessageBox.Show("You clicked Yes!");

else

    MessageBox.Show("You clicked No!");

// Form.Load event
private void DialogMessage_Load(object sender, EventArgs e) 
{
      // Set the starting locations and sizes of the labels
      // Adjust the locations and sizes of the labels to properly show the information
}

DialogMessage.cs包含下面的以下三个代码块；一个  public static方法和两个enum：

// Message icon enum for switch statement in ShowMessage
// This will set the Image for the PictureBox
public enum MsgIcons
{
    None = 0,
    Question = 1,
    Info = 2,
    Warning = 3,
    Error = 4,
    Shield = 5
}

private void DialogMessage_Load(object sender, EventArgs e)
{
    // Once the ShowMessage function is called and the form appears
    // the code below makes the appropriate adjustments so the text appears properly

    // If no icon will be shown then shift the MainInstruction and Content 
    // left to an appropriate location

    // Adjust the MaximumSize to compensate for the shift left.
    if (msgIcon.Visible == false)
    {
        mainInstruction.Location = new Point(12, mainInstruction.Location.Y);
        mainInstruction.MaximumSize = new Size(353, 0);

        content.Location = new Point(12, content.Location.Y);
        content.MaximumSize = new Size(353, 0);
    }

    // Gets the Y location of the bottom of MainInstruction
    int mainInstructionBottom = mainInstruction.Location.Y + mainInstruction.Height;

    // Gets the Y location of the bottom of Content
    int contentBottom = content.Location.Y + content.Height;

    // Offsets the top of Content from the bottom of MainInstruction
    int contentTop = mainInstructionBottom + 18; // 18 just looked nice to me

    // Sets new location of the top of Content
    content.Location = new Point(content.Location.X, contentTop);

    if (content.Text == string.Empty)

        // If only MainInstruction is provided then make the form a little shorter
        Height += (mainInstruction.Location.Y + mainInstruction.Height) - 50;
    else
        Height += (content.Location.Y + content.Height) - 60;
}

DialogMessage.cs中的ShowMessage方法：

public static DialogResult ShowMessage(string _windowTitle,
                                        string _mainInstruction,
                                        MsgButtons _msgButtons,
                                        MsgIcons _msgIcons = MsgIcons.None,
                                        string _content = "")
{
    // Creates a new instance of MainForm so we can set the properties of the controls
    MainForm main = new MainForm();

    // Sets the initial height of the form
    main.Height = 157;

    // Sets Window Title
    main.Text = _windowTitle;

    // Sets MainInstruction
    main.mainInstruction.Text = _mainInstruction;

    // Sets Content
    main.content.Text = _content;

    // Sets the properties of the buttons based on which enum was provided
    switch (_msgButtons)
    {
        // Button1 is the left button
        // Button2 is the right button

        case MsgButtons.OK:
            
            main.Button1.Visible = false;
            main.Button2.DialogResult = DialogResult.OK;
            main.Button2.Text = "OK";
            main.AcceptButton = main.Button2; 
            main.Button2.TabIndex = 0;
            main.ActiveControl = main.Button2;

            break;

        case MsgButtons.OKCancel:

            main.Button1.DialogResult = DialogResult.OK;
            main.Button2.DialogResult = DialogResult.Cancel;
            main.Button1.Text = "OK";
            main.Button2.Text = "Cancel";
            main.AcceptButton = main.Button2; 
            main.Button1.TabIndex = 1;
            main.Button2.TabIndex = 0;
            main.ActiveControl = main.Button2;

            break;

        case MsgButtons.YesNo:

            main.Button1.DialogResult = DialogResult.Yes;
            main.Button2.DialogResult = DialogResult.No;
            main.Button1.Text = "Yes";
            main.Button2.Text = "No";
            main.AcceptButton = main.Button2; 
            main.Button1.TabIndex = 1;
            main.Button2.TabIndex = 0;
            main.ActiveControl = main.Button2;

            break;

        default:
            break;
    }

    // Sets the Image for the PictureBox based on which enum was provided
    if (_msgIcons != MsgIcons.None)
    {
        main.msgIcon.Visible = true;

        switch (_msgIcons)
        {
            case MsgIcons.Question:

                main.msgIcon.Image = SystemIcons.Question.ToBitmap();
                break;

            case MsgIcons.Info:

                main.msgIcon.Image = SystemIcons.Information.ToBitmap();
                break;

            case MsgIcons.Warning:

                main.msgIcon.Image = SystemIcons.Warning.ToBitmap();
                break;

            case MsgIcons.Error:

                main.msgIcon.Image = SystemIcons.Error.ToBitmap();
                break;

            case MsgIcons.Shield:

                main.msgIcon.Image = SystemIcons.Shield.ToBitmap();
                break;

            default:
                break;
        }
    }
    else
    {
        main.msgIcon.Visible = false;
    }

    // Shows the message and gets the result selected by the user
    return main.ShowDialog();
}