Changing variables from one form in another form

May 4, 2024

Is there a way to change variables that are in Form1 from Form2?
I tried using method in Form1, and calling it from Form2.
Here is a method in Form1 to change variables that I wrote:

public void change(int newval)
{
    val = newval;
}

I tried calling it in Form2 by:

form1.change(newval)

where form1 would be passed in through a constructor:

Form1 form1;
public Form2(Form1 form1)
{
    this.form1 = form1;
    InitializeComponent();
}

But I can’t find a way to get Form1 as an object to pass it into the constructor.

>Solution :

A simple way to make form1 accessible globally as Program.form1:

public static class Program
{
    public static Form1 form1;

    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        form1 = new Form1();
        Application.Run(form1);
    }
}