C#

1. Iterate through the form's Controls collection to get at the named control.
   
2. Use Int16.TryParse() to convert the .Text property of that control to an integer.

string lookForControl = "textBox12";
string foundControlText = "";
foreach(Control ctrl in this.Controls)
{
  if(ctrl.Name == lookForControl)
  {
     foundControlText = ctrl.Text;
  }
}
MessageBox.Show("Control " + lookForControl + " has the Text: " + foundControlText);

FieldInfo fi = this.GetType().GetField( "textBoxInfinity", BindingFlags.Instance | BindingFlags.NonPublic );
TextBox txt = fi.GetValue( this ) as TextBox;
txt.Text = "HELLO";

Schimaera wrote:

I didn´t heared about reflections. (is this right -> grammar?)

J4amieC wrote:

Had the poster come back and said "It does not work because textbox12 is inside a panel", then I would have delved into the obvious recursive method!

Schimaera wrote:

Command. str = "textBox12".

Schimaera wrote:

int a = ConvertToInt16(str.Text)