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• How do I get the mouse cursor position in my control's client coordinates?

  Use the Position property of the Cursor class found in the System.Windows.Forms namespace. Here is code that will flag whether the mouse is over button1. Point point = PointToClient( Cursor.Position ); bool mouseIsOverButton1 = button1.Bounds.Contains...

• How do I receive notification of the mouse being over a control?

  Add a handler for the control's MouseMove event. This will be hit as the mouse moves over the control's Bounds rectangle. Contributed from George Shepherd's Windows Forms FAQ

• How do I set the mouse cursor position?

  The Cursor.Position property is a static property with both get and set methods available. Remember that the Point object used by the property is in screen coordinates. Here is code that move the mouse position down 20 points. Point point = Cursor.Position;...

• How do I allow the user to drag a window if it doesn't have a title bar or border?

  You can drag such a window by using Win32 APIs to switch the mouse hit to WM_NCLBUTTONDOWN. The code below will allow you to drag by mousing down anywhere in the form's clientarea as long as you don't hit a child control on the form. using System...

• How do I determine if a mouse button is pressed and moving over a form?

  Catch the form's MouseMove event which is called when the mouse moves over the form. To determine if a button is pressed during the move, check the event arg's Button property. The code below draw's a line on the form as the mouse moves over...

• Why do I not receive MouseLeave messages in a Control in a Form?

  This usually happens when a Control doesn't know that the mouse has left its bounds following a mouse enter. This results in the Control not throwing a MouseLeave event for subsequent mouse moves over it. This is possible if you performed some operation...