ToolStripItem.OnMouseEnter(EventArgs) Method
Definition
Important
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Raises the MouseEnter event.
protected:
virtual void OnMouseEnter(EventArgs ^ e);protected virtual void OnMouseEnter (EventArgs e);abstract member OnMouseEnter : EventArgs -> unit
override this.OnMouseEnter : EventArgs -> unitProtected Overridable Sub OnMouseEnter (e As EventArgs)Parameters
Examples
The following code example demonstrates how to override the OnMouseEnter method. This code example is part of a larger example provided for the ToolStripItem class.
// This method defines the behavior of the MouseEnter event.
// It sets the state of the rolloverValue field to true and
// tells the control to repaint.
protected override void OnMouseEnter(EventArgs e)
{
base.OnMouseEnter(e);
this.rolloverValue = true;
this.Invalidate();
}
' This method defines the behavior of the MouseEnter event.
' It sets the state of the rolloverValue field to true and
' tells the control to repaint.
Protected Overrides Sub OnMouseEnter(e As EventArgs)
MyBase.OnMouseEnter(e)
Me.rolloverValue = True
Me.Invalidate()
End Sub
Remarks
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
The OnMouseEnter method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
Notes to Inheritors
When overriding OnMouseEnter(EventArgs) in a derived class, be sure to call the base class's OnMouseEnter(EventArgs) method so that registered delegates receive the event.
