Login.Dispose(true);

logIn logInInstance = new logIn();
logInInstance.ShowDialog();
if (logInInstance.IsLoggedIn) {
		deptInfo deptInfoInstance = new deptInfo();
		deptInfoInstance.user = logInInstance.user;
		deptInfoInstance.ShowDialog();
} else {
	MessageBox.Show("Better luck next time.");
}

LogIn logIn = new LogIn();

LogIn logInA = new LogIn();
LogIn logInB = new LogIn();

logInA.Show();
logInB.Show();
MessageBox.Show("Now you see two login forms.");

// who am i closing?  Doesn't matter, doesn't work.
// LogIn.Close();

// you can close a form object, though
logInA.Close();
MessageBox.Show("Now you see only one login form.");

LogIn logIn = new LogIn();
logIn.ShowDialog();
if (!logIn.IsLoggedIn) {
	MessageBox.Show("Not logged in, good bye.");
	return;
}

DeptInfo deptInfo = new DeptInfo();
deptInfo.User = logIn.User;
deptInfo.ShowDialog();
if (!deptInfo.IsSubmitted) {
	MessageBox.Show("No deparment chosen.");
	return;
}

ProgramInfo progInfo = new ProgramInfo();
progInfo.Data = deptInfo.Data;
// want to pass it user info too?  you could
//progInfo.User = logIn.User;
progInfo.ShowDialog();
MessageBox.Show("We're done, was it good for you?");

using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace SimpleFormCall {
	class Program {
		[STAThread]
		static void Main() {
			Application.EnableVisualStyles();
			Application.SetCompatibleTextRenderingDefault(false);
			Application.Run(new Form1());
		}
	}
}

using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace SimpleFormCall {
	class Program {
		private string userName;
		private string departmentName;
		public Program() { }
		
		public bool ValidateUser() {
			this.userName = null;
			try {
				LogIn logIn = new LogIn();
				logIn.ShowDialog();
				if (logIn.IsLoggedIn) {
					this.userName = logIn.user;
					return true;
				}
			} catch (Exception ex) {
				MessageBox.Show(ex.Message, "Login Error");
				return false;
			}
			MessageBox.Show("Not logged in, good bye.", "Login Error");
			return false;
		}

		public bool ShowDeptInfo() {
			DeptInfo deptInfo = new DeptInfo();
			deptInfo.User = this.User;
			deptInfo.ShowDialog();
			if (deptInfo.IsSubmitted) {
				this.departmentName = deptInfo.departmentName;
			}
			return deptInfo.IsSubmitted;
		}

		public void ShowProgramInfo() {
			ProgramInfo progInfo = new ProgramInfo();
			progInfo.departmentName = this.departmentName;
			progInfo.User = this.User;
			progInfo.ShowDialog();
		}
		
		
		public string User { get { return userName; } }
		
		
		[STAThread]
		static void Main() {
			Application.EnableVisualStyles();
			Application.SetCompatibleTextRenderingDefault(false);
			// forget this, we'll handle it ourselves
			//Application.Run(new Form1());
			
			Program pgm = new Program();
			// if they don't login correctly, we can just stop.
			if (!pgm.ValidateUser()) { return; }
			
			if (pgm.ShowDeptInfo()) {
				pgm.ShowProgramInfo();
			}
			// THIS IS WHAT CLOSES THE APPLICATION!!!
			// when you reach the end of the entry block, you leave.
			// that prior return mean application done.  reach here, done.
			// The default Application.Run(new Form1()); remains active until
			// the instance of Form1 is closed.  Then it's done.
			// You control this block.  You leave when you want to.
		}
	}
}