can a form reflect a value(like a function)?

Hi faezun, I think you should work on your general .net/OOP understanding. A constructor like you have given in your example NEVER returns a value!!!! (only the constructed object) So someproperty = new frmPerson(); never works (same in C++, Java...). Just expose properties and maybe initialize with parameterized constructor (like pashad showed you).

Maybe I can give you a similar (but full)example:

using System;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    static class Program
    {
        [STAThread]
        static void Main()
        {
            string strSomeProperty = "Hello Form!";

            // create a form
            FormWithProperty form = new FormWithProperty(strSomeProperty);
            form.ShowDialog();

            MessageBox.Show("Property was: " + form.SomeProperty);
        }

        class FormWithProperty : Form
        {
            TextBox m_textbox; 

            // don't forget to write a default constructor if you provide a parametrized one, and want the possibility to construct the form with a default value...
            public FormWithProperty() : this("DefaultString") { }
            public FormWithProperty(string strSomeProperty)
            {
                InitializeComponentDummy();

                SomeProperty = strSomeProperty;
            }

            private void InitializeComponentDummy()
            {
                m_textbox = new TextBox();
                m_textbox.Multiline = true;
                m_textbox.Dock = DockStyle.Fill;
                Controls.Add(m_textbox);
            }

            public string SomeProperty
            {
                get { return m_textbox.Text; }
                set { m_textbox.Text = value; }
            }
        }
    }
}

(copy to a new WindowsForms-Project and replace the file Program.cs content with my example code -> run)

int a = 10;
calling in frmAccount

frmPerson f1 = new frmPerson(a); 
f1.ShowDialog();

FrmPersons Code: on this form create a parameterized constructor on this as shown below,

int _a =0;
public frmPerson(int a)
   {
      InitializeComponent();
      _a = a;
   }

Access _a where ever you wants.
Message if any problem..