Hi, I have a viewer that uses multiple TabPages to view groups of rectangular objects. I want to enable the user to drag an object from one tab page to another tab page. If the left mouse button is NOT down, the Tabcontrol's MouseMove, MouseEnter, & MouseHover handlers are called. However, once the left mouse button is down for the drag, these handlers are never called. How do I implement simple drag & drop between tab pages? The problem is I can't activate the target tabpage if the TabControl's or the TabPage's handlers are not called when the mouse rolls over the tab. Any help appreciated, Royce