C#

myTabControl.TabPages.Add(new TabPage("Title goes here"));

//Gets the tab page at index zero and assigns it to myTabPage
TabPage myTabPage = myTabControl.TabPages[0];

//Now we need to set up our control
Control myControl = new Control();
myControl.Width = 200;   //Make it a 200x500 pixel control
myControl.Height = 500;
myControl.Top = 30;      //Set it 30x30 from the upper left hand corner of the tab page
myControl.Left = 30;

//Now add it to the tab page
myTabPage.Controls.Add(myControl); 

<br />
textBox1.KeyPress += new new System.Windows.Forms.KeyPressEventHandler(this.textBox1_KeyPress);<br />

private void textBox1_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
   if (!Char.IsDigit (e.KeyChar))
   {
      e.Handled = true;
   }
}

public class MyClass
{
  private string firstname = "";
  public string FirstName
  { get { return firstname;}
    set { firstname = value;}}

  private DateTime startdate = DateTime.Now;
  public string StartDate
  { get { return startdate;}
    set { startdate = value;}}
  
}