All drag operations inherit directly or indirectly from the DragOperation class and as a result share a number of common features.

Events

All drag operations fire the BeginDrag, DoDrag, EndDrag and Cancel events. Their meaning and parameters are described in the following table: 

You subscribe to these events in the following manner:

AddHandler someDragTool.BeginDrag, AddressOf OnSomeDragToolBeginDrag
AddHandler someDragTool.EndDrag, AddressOf OnSomeDragToolEndDrag
AddHandler someDragTool.DoDrag, AddressOf OnSomeDragToolDoDrag
AddHandler someDragTool.Cancel, AddressOf OnSomeDragToolCancel

someDragTool.BeginDrag += new EventHandler(OnSomeDragToolBeginDrag);
someDragTool.EndDrag += new EventHandler(OnSomeDragToolEndDrag);
someDragTool.DoDrag += new EventHandler(OnSomeDragToolDoDrag);
someDragTool.Cancel += new EventHandler(OnSomeDragToolCancel);

Cancelling drag operations

All drag operations can be cancelled by the end-user when the Esc key is pressed. In addition, you can terminate a drag operation by calling the virtual CancelOperation method of DragOperation class.

Changing the mouse drag button

Most of the drag operations are activated when the end-user presses the left mouse button and drags the mouse over the chart. An exception to this is the DataPanTool drag operation, which is activated when the end-user presses the right mouse button. You can control the mouse button that triggers the drag operation by modifying the MouseDragButton property of the DragOperation object:

someDragTool.MouseDragButton = MouseButtons.Right

someDragTool.MouseDragButton = MouseButtons.Right;

Changing the mouse cursor

The mouse cursor associated with each drag operation can be modified through the Cursor property of the DragOperation object:

someDragTool.Cursor = Cursors.Hand

someDragTool.Cursor = Cursors.Hand;