This class encapsulates the data for the Control.MouseDown , Control.MouseUp , and Control.MouseMove events. You can determine the X and Y coordinates of the mouse (in client coordinatescontrast this with Control.MousePosition ), the Button that was pressed (note that this is the button that caused the event, not the total set of buttons currently depressedyou should use Control.MouseButtons for this information). You can also determine the number of Clicks that have occurred (i.e., single, double, triple, etc.), and the Delta through which the mouse wheel has rotated . public class MouseEventArgs : EventArgs { // Public Constructors public MouseEventArgs (MouseButtons button , int clicks , int x , int y , int delta ); // Public Instance Properties public MouseButtons Button {get; } public int Clicks {get; } public int Delta {get; } public int X {get; } public int Y {get; } } HierarchySystem.Object System.EventArgs MouseEventArgs SubclassesStatusBarPanelClickEventArgs Passed ToControl.{OnMouseWheel() , RaiseMouseEvent()} , System.Windows.Forms.Design.ComponentTray.{OnMouseDown() , OnMouseMove() , OnMouseUp()} , MouseEventHandler.{BeginInvoke() , Invoke()} |