Introduction - If you have any usage issues, please Google them yourself
VB magnetic source form, can be adsorbed window automatically when dragging a window to the edge of another form, two windows will attract each other, borders close together, common in some of the players. Three sub-window as shown above, the magnetic window are adsorbed to each other are not separated from each other. Friends want to achieve such a window function, I think this is a good reference example.