Question

in C# forms I need code to add a second form to my existing. this is what I’ve tried:

First form:

public partial class frmMain : Form
{
    public frmMain()
    {
        InitializeComponent();
    }
    private void frmMain_Load(object sender, EventArgs e)
    {
        frmMain fM = new frmMain();
        fM.KeyPress += new KeyPressEventHandler(MMForm);

    }
    private void MMForm(object sender, KeyPressEventArgs e)
    {
        Keys KP; KP = (Keys)sender;
        if (KP == Keys.Escape) { frm2 fM2 = new frm2(); fM2.Show(); }

    }
}

And this is Second form:

public class frm2 : Form
{
    public frm2()
    {
        frm2 fM2 = new frm2();
        fM2.Height = 200; fM2.Width = 200;
        Controls.AddRange(new System.Windows.Forms.Form[] { fM2 });
    }

}

What am I missing?

EDIT: forget all this for a moment. Even if I do it as suggested down there I get an error when I press the key.

An unhandled exception of type 'System.InvalidCastException' occurred in Project 09.exe
Additional information: Specified cast is not valid.

Answer 1

You could do this:

public partial class frmMain : Form
{
    public frmMain()
    {
        InitializeComponent();
    }
    private void frmMain_Load(object sender, EventArgs e)
    {
        this.private void MMForm(object sender, KeyPressEventArgs e)
    }
    private void MMForm(object sender, KeyPressEventArgs e)
     {
        if (e.KeyChar == Convert.ToChar(((int)Keys.Escape)))
        {
            frm2 fM2 = new frm2(); fm2.Height=200; fm2.Width=200; fM2.Show(); 
        }
}

public class frm2 : Form 
{ 
    public frm2() 
    {  
        InitializeComponent();
    } 
}