Private system.windows.Forms.TextBox textBox1;
PRIVATE STRING TEXT;
Public Form1 ()
{
Text = textbox1.text;
}
Private void textbox1_textchanged (Object Sender, System.Eventargs E)
{
INT LEN = text.length;
IF (len
{
INDEX = TextBox1.text.indexof (text);
CHAR C = (TextBox1.text.remove (Index, Text.length)) [0];
IF (C.Compareto ('0') <0 || C.Compareto ('9')> 0)
{
TextBox1.text = text;
TextBox1.SelectionStart = text.length;
}
}
Text = textbox1.text;
}
