Question

I have a test app with multiple forms, one being a crude kind of menu. When I select one of the other forms with a button click the menu form minimises. All good.

What I want to happen now is when I have finished with the second form and click the red cross I want the menu to open back up from the tray. Seems simple but Im pulling my hair out.

private void Form2_Closing(object sender,System.ComponentModel.CancelEventArgs e)
{
    var menu = FormControl.MainMenu;
    menu.WindowState = FormWindowState.Normal;

    e.Cancel = false;
}

FormControl is my class to ensure only one instance of MainMenu can be opened. The code works inside the button click event but I am unable to get any kind of form closed/closing event to trigger.

Answer 1

ok, your comment about “Windowstate may not work in that particular event” disturbed me so I made simple test:

1. Created Form1 and Form2
2. Added button and click event to Form1
3. Added FormClosed event to Form2

Button1 Click event handler:

private void button1_Click(object sender, EventArgs e)
{
    Form2 form2 = new Form2();
    form2.WindowState = FormWindowState.Normal;
    WindowState = FormWindowState.Minimized;
    form2.Show(this);//Passing Form1 as owner
    form2.Activate();
}

Form2 FormClosed event handler:

private void Form2_FormClosed(object sender, FormClosedEventArgs e)
{
    this.Owner.WindowState = FormWindowState.Normal;//change state of owner form
}

Result:
After program launches – opens Form1. After clicking button – Form1 minimizes and Form2 pops up. After closing Form2 – Form1 restores to normal state.

Resume:
double check if your Form2 REALY suscribed to FormClosed or FormClosing event.