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• How do I make a control handle the arrow keys, instead of having arrow keys automatically handled by the framework's focus management?

  By default, the arrow keys are not handled by a control's key processing code, but instead are filtered out for focus management. Hence, the control's KeyDown, KeyUp and KeyPressed events are not raised when you press an arrow key. If you want...

• How do I prevent a control from getting a particular keystroke?

  You can handle the control's KeyPress event and indicate the key has been handled. Below is code that prevents a TextBox from getting an 'A' and the Enter key. private void textBox1_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs...

• How do I check the state of virtual keys such as Caps Lock?

  If the Control.ModifierKeys doesn't address your issue, then use P/Invoke and call GetKeyState directly. Declare this class first: [ ComVisibleAttribute( false ), SuppressUnmanagedCodeSecurityAttribute() ] internal class NativeMethods { [ DllImport...

• How do I determine if an Alt, Shift or Ctrl key is pressed without handling an event?

  Use the static property Control.ModifierKeys. Console.WriteLine(Control.ModifierKeys); if ( (Control.ModifierKeys & Keys.Shift) != 0 ) Console.WriteLine("the shift key is down"); if ( (Control.ModifierKeys & Keys.Alt) != 0 ) Console...

• How do I simulate keyboard input in my application?

  This can be done through the SendKeys class in the System.Windows.Forms namespace. Contributed from George Shepherd's Windows Forms FAQ