values inputed in one form and used in another form

Create Statis variable in Program.cs

public static string UserName

When the log in success assign UserName to this static variable

Program.UserName = "UserName";

And when you are showing any form in the application access this static variable and disply the user name

lblUSerName.Text = Program.UserName;

Here is the Complete code

1. Program.cs

static class Program

public static string UserName;

///

[STAThread]

static void Main()

Application.EnableVisualStyles();

Application.SetCompatibleTextRenderingDefault(false);

Application.Run(new Login());

2. Log in Page

public partial class Login : Form

public Login()

private void button1_Click(object sender, EventArgs e)

if ("Your code to check the Login")

Program.UserName = "UserName";

Form1 f = new Form1();

3. Form

public partial class Form1 : Form

public Form1()

private void Form1_Load(object sender, EventArgs e)

lblUSerName.Text = Program.UserName;