Drag And Drop From List Box To ListBox

I have made an application, but I have 2 listboxes on a form, where I have to drag data from the listbox, to the other listbox. But when it dropped into the listbox I want the data already in the listbox to turn to what I am about to drop. Also I dont want all the data to change just part.

Can anyone help me with this, please

If you have the coding that would be very helpful as a guideline

Thanks

It's in the forums, i've seen it here... not hard to do

squirrelly1