'宣言
 
Public Overrides Function HitTest( _
   ByVal x As System.Integer, _
   ByVal y As System.Integer _
) As System.Windows.Forms.AccessibleObject

public override System.Windows.Forms.AccessibleObject HitTest( 
   System.int x,
   System.int y
)

An System.Windows.Forms.AccessibleObject that represents the child object at the given screen coordinates. This method returns the calling object if the object itself is at the location specified. Returns null 参照 (Visual Basicでは Nothing) if no object is at the tested location.