How to add additional controls in User Interface Design?

This post teaches you to use additional controls to build application forms.  These controls include:  TextBox, MaskedTextBox, RichTextbox, GroupBox, CheckBox, RadioButton, and PictureBox.  You will learn how to lay out a form and set various properties to change the appearance and behavior of controls. Programming topics include clearing TextBox controls, changing text color, concatenating (adding together) strings of text, and making controls visible/invisible at run time.