RadButton, RadCheckBox, RadRadioButton, and RadToggleButton support mnemonics.
All you need to do is to specify the character that will be used for a given control by placing the & character before the desired symbol. The following example demonstrates how the r key is used for radButton1 mnemonic:
this.radButton1.Text = "&radButton1";
Me.radButton1.Text = "&radButton1"
The UseMnemonic property is a boolean property which controls whether the & character is displayed as the symbol itself or whether it is used to designate a mnemonic (visualized as an underscore). Its default value is true i.e. mnemonics are used by default.
For the example, about radButton1, pressing the r key is the same as clicking on the button.