Detect if cursor is within the bounds of a control

Question

I have a user control

public partial class UserControl1 : UserControl, IMessageFilter {     public UserControl1()     {         InitializeComponent();         Application.AddMessageFilter(this);     }      public bool PreFilterMessage(ref Message m)     {         var mouseLocation = Cursor.Position;          if (Bounds.Contains(PointToClient(mouseLocation)))         {             bool aBool = true;//breakpoint             bool two = aBool;//just assignment so compiler doesn't optimize my bool out         }         if (m.Msg != 0x20a) // Scrolling Message         {             return false;//ignore message         }         return false;     } } 

When I float over the user control contained in a parent form, the breakpoint is not hit. The breakpoint is hit in close proximity, but I can be in an actual textbox inside the user control and not get a hit. How can I accurately determine if I am within the bounds of this user control?

FWIW, I have two monitors. It does not appear to make a difference which monitor I am using.

Answer 1

Try your hit testing against Control.ClientRectangle rather than Control.Bounds:

if (ClientRectangle.Contains(PointToClient(Control.MousePosition))) {     bool aBool = true;//breakpoint      bool two = aBool; }