Controlling the Opening and Closing of Forms in Windows Apllication

[Mai Moon]

I need an urgent help,I have a startup form for loading my application,then after the load(closing that form),another 2 forms are opened :Main Application Form and Login Form,The Login Form appears as modal form,so as to the user must login or register first then the main application form appears,This surely after closing the login form.What happens is both of these 2 forms are still opened in the background and also the startup form appears as notification for the current running program.I tried a lot of methods such as:Close(),Dispose(),Hide() ,but with no use.This problem repeates with all other forms.So,What can I do in details ,please?????Thanks I Advance.

[PsychoCoder]

Why don't you show the code that's causing this issue as we're not mind readers :)

[Mai Moon]

private void Form1_Load(object sender, EventArgs e)
{
timer1.Enabled = true;
timer1_Tick(progressBar1, e);
}


int min, max;
private void timer1_Tick(object sender, EventArgs e)
{
// timer1.Start();
timer1.Enabled = true;
progressBar1.Minimum = 0;
progressBar1.Maximum = 10000;
min = progressBar1.Minimum;
max = progressBar1.Maximum;


for (int i = progressBar1.Minimum; i <= progressBar1.Maximum; i++)
{

progressBar1.Increment(1);
progressBar1.Value=i;
// progressBar1.PerformStep();
}

if (progressBar1.Value == max)
{

timer1.Enabled = false;
// MessageBox.Show("The form is already opened");
this.Show();

ManagementForm manage = new ManagementForm();
manage.Show();
LoginForm login = new LoginForm();
login.ShowDialog();
this.Close();
this.Dispose();



}



}