Protected Overrides Sub InitAppearance( _
   ByRef appearance As Infragistics.Win.AppearanceData, _
   ByRef requestedProps As Infragistics.Win.AppearancePropFlags _
) 

protected override void InitAppearance( 
   ref Infragistics.Win.AppearanceData appearance,
   ref Infragistics.Win.AppearancePropFlags requestedProps
)

Imports Infragistics.Win

 Private mouseEnteredElement As Boolean = False
 Private mouseHoveringOnElement As Boolean = False

 Protected Overrides Sub InitAppearance(ByRef appearance As AppearanceData, ByRef requestedProps As AppearancePropFlags)

     MyBase.InitAppearance(appearance, requestedProps)

     ' Set BackColor based on whether or not mouse is over
     ' the element.
     If (Me.mouseHoveringOnElement) Then
         appearance.BackColor = Color.Green
     ElseIf (Me.mouseEnteredElement) Then
         appearance.BackColor = Color.Red
     Else
         appearance.BackColor = Color.Transparent
     End If

 End Sub


 Protected Overrides Sub OnMouseEnter()

     Me.mouseEnteredElement = True

' Call when sub UIElements need to simply be repainted (color change etc).
If Not Me.IsDrawing then
      Me.Invalidate()
End If

 End Sub

 Protected Overrides Sub OnMouseHover()

     Me.mouseHoveringOnElement = True

' Call when sub UIElements need to be repositioned or sized.
     Me.DirtyChildElements()

 End Sub

 Protected Overrides Sub OnMouseLeave()

     Me.mouseHoveringOnElement = False
     Me.mouseEnteredElement = False

     If Not Me.IsDrawing then
      Me.Invalidate()
End If

 End Sub

 Protected Overrides ReadOnly Property WantsMouseHoverNotification() As Boolean

     Get
         Return True
     End Get

 End Property

using Infragistics.Win;

private bool mouseEnteredElement = false;
private bool mouseHoveringOnElement = false;

protected override void OnMouseHover()
{

	this.mouseHoveringOnElement = true;

	// Call when sub UIElements need to be repositioned or sized.
	this.DirtyChildElements();

}

protected override bool WantsMouseHoverNotification
{

	get
	{
		return true;
	}

}


protected override void OnMouseEnter()
{

	this.mouseEnteredElement = true;

	// Call when sub UIElements need to simply be repainted (color change etc).
	if (!this.IsDrawing)
		this.Invalidate();

}


protected override void OnMouseLeave()
{

	this.mouseHoveringOnElement = false;
	this.mouseEnteredElement = false;

	// Call when sub UIElements need to simply be repainted (color change etc).
	if (!this.IsDrawing)
		this.Invalidate();

}


protected override void InitAppearance(ref AppearanceData appearance, ref AppearancePropFlags requestedProps)
{

	base.InitAppearance(ref appearance, ref  requestedProps);

	// Set BackColor based on whether or not mouse is over
	// the element.
	if(this.mouseHoveringOnElement)
		appearance.BackColor = Color.Green;
	else if(this.mouseEnteredElement)
		appearance.BackColor = Color.Red;
	else
		appearance.BackColor = Color.Transparent ;

}