By default, the ExpandOnDblClick property is False.  The ExpandOnDblClick property specifies whether the item being double-clicked gets expanded or collapsed, in a face of tree type. Use the EnsureVisibleFaceOnDblClick property to prevent ensuring visible the face being double-clicked. The DblClick event occurs once the user double-clicks any face of the control. By default, the face being double-clicked gets visible. The FaceFromPoint property retrieves the index of the face from the cursor. The AnchorFromPoint proeprty retrieves the key of the hyperlink/anchor from the cursor. Use a MouseDown or MouseUp event procedure to specify actions that will occur when a mouse button is pressed or released. Unlike the Click and DblClick events, MouseDown and MouseUp events lets you distinguish between the left, right, and middle mouse buttons. You can also write code for mouse-keyboard combinations that use the SHIFT, CTRL, and ALT keyboard modifiers.