How to fetch or grab input from my forms app

I'm randomperson heres my code and it is a calculator:

namespace WindowsFormsApplication1
{
    partial class Form1
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.num1 = new System.Windows.Forms.NumericUpDown();
            ((System.ComponentModel.ISupportInitialize)(this.num1)).BeginInit();
            this.SuspendLayout();
            // 
            // num1
            // 
            this.num1.Accessib开发者_开发技巧leName = "";
            this.num1.Location = new System.Drawing.Point(12, 12);
            this.num1.Name = "num1";
            this.num1.Size = new System.Drawing.Size(120, 20);
            this.num1.TabIndex = 0;
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(284, 262);
            this.Controls.Add(this.num1);
            this.Name = "Form1";
            this.Text = "Form1";
            ((System.ComponentModel.ISupportInitialize)(this.num1)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.NumericUpDown num1;

    }
}

There is only a NumericUpDown control in your form so i'm assuming you want to fetch that value of that control. You'll have to use num1.Value to get it's value.

Try

    protected override void OnLoad(EventArgs e)
    {
        base.OnLoad(e);
        num1.ValueChanged += new EventHandler(numericUpDown1_ValueChanged);
    }

    void numericUpDown1_ValueChanged(object sender, EventArgs e)
    {
        MessageBox.Show("New value : " +num1.Value);
    }