How to create a custom message box in Windows Form Application.

Step 1: Create a New Form

1. Add a New Form: In your Windows Forms project, add a new form to the project. You can do this by right-clicking on your project in the Solution Explorer, selecting "Add," and then "Windows Form." Name it something like CustomMessageBox.

2. Design the Form:

   • Set the Form Properties: Set properties such as FormBorderStyle to FixedDialog, MaximizeBox to False, MinimizeBox to False, and StartPosition to CenterParent.
   • Add Controls: Add the necessary controls to your form. Typically, a custom message box might include:
     • A Label to display the message.
     • One or more Button controls for user actions (e.g., "OK", "Cancel").
     • Optionally, add an Icon to represent the type of message (information, warning, error).

Step 2: Customize the Form Logic

1. Add Properties: Add properties to the form to allow passing in the message text and button labels.

   public partial class CustomMessageBox : Form
   {
       public CustomMessageBox(string message, string title, string button1Text = "OK", string button2Text = "")
       {
           InitializeComponent();
           this.Text = title;
           lblMessage.Text = message;
           btnOK.Text = button1Text;
   
           if (!string.IsNullOrEmpty(button2Text))
           {
               btnCancel.Text = button2Text;
               btnCancel.Visible = true;
           }
           else
           {
               btnCancel.Visible = false;
           }
       }
   }
   

2. Button Click Events: Implement the click events for the buttons.

   private void btnOK_Click(object sender, EventArgs e)
   {
       this.DialogResult = DialogResult.OK;
       this.Close();
   }
   
   private void btnCancel_Click(object sender, EventArgs e)
   {
       this.DialogResult = DialogResult.Cancel;
       this.Close();
   }
   

Step 3: Use the Custom Message Box

1. Now that your custom message box is ready, you can use it in your application.

   private void ShowCustomMessageBox()
   {
       using (CustomMessageBox customMessageBox = new CustomMessageBox("Do you want to save changes?", "Confirm Save", "Yes", "No"))
       {
           DialogResult result = customMessageBox.ShowDialog();
   
           if (result == DialogResult.OK)
           {
               // Handle OK action
               MessageBox.Show("You clicked Yes!");
           }
           else if (result == DialogResult.Cancel)
           {
               // Handle Cancel action
               MessageBox.Show("You clicked No!");
           }
       }
   }
   

this is just a basic example try to change accordingly with your logic.