DragOverFromControl

Function Name	c:<CONTROL-NAME>#OnDragOverFromControl
Syntax	`(defun c:<CONTROL-NAME>#OnDragOverFromControl (ProjectName [as String] FormName [as String] ControlName [as String] DropPoint [as Varies] /) )`
Return Type	Bitflag
Applies To	Block List, Block View, DWG List, DWG Preview, Graphic Button, Hatch, Label, List Box, List View, Picture Box, Slide View, Text Box, Text Button, Tree

This event is triggered as the user passes the cursor over the control during a drag and drop operation from another OpenDCL control (or from this control). The return value from this function is used to determine which type of action will occur if the drop is made at the current point. The ProjectName, FormName, and ControlName arguments identify the control from which the drag operation was initiated. The DropPoint argument is a 2DPoint in most cases, with the following exceptions.

Control Receiving Event	DropPoint Argument
Tree Control with item keys	String (key of item at drop point)
Tree Control without item keys	Handle (handle of item at drop point)
All other controls	2DPoint (drop point in control client coordinates)

Return Value	Behavior
NIL	Default
0	None
1	Copy
2	Move
4	Link