Public Overridable Function HitTest( _
   ByVal testPoint As AnnPoint, _
   ByVal buffer As Integer _
) As Object

Visual Basic (Usage)	Copy Code
Dim instance As AnnObject Dim testPoint As AnnPoint Dim buffer As Integer Dim value As Object   value = instance.HitTest(testPoint, buffer)

public virtual object HitTest( 
   AnnPoint testPoint,
   int buffer
)

public:
virtual Object^ HitTest( 
   AnnPoint testPoint,
   int buffer
) 

Parameters

testPoint

The AnnPoint to be tested.

buffer

Threshold buffer value, in pixels.

Return Value

This method is called internally by the annotation framework whenever the HitTest method is called. You can call this method on the annotation object returned from HitTest to fine tune the hit-test value if applicable.

testPoint should be in physical coordinates.

buffer is used to make the test point "bigger" to compensate for errors and provide smoother hit-testing. For example, if buffer is 2, a square with a length of 4 pixels around testPoint will be used to perform the hit-testing.

If this AnnObject is invisible (Visible is set to false), this method will return null (Nothing in Visual Basic).

By default, an annotation object will return AnnObject.DefaultHitTestValue if hit-testing was satisfied. Derived objects can override this method to fine tune the return value.

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

Reference