I program to do similar software of the figure above, the effect of the left there is a similar to the treeview control, can add child nodes, on the right is that each node corresponding background images, images need to be able to add similar shape control of the lamp, the effect of the specific look at the following a few figure: (below is the figure after adding nodes) add alarm module after the picture is as follows: (I want to do you could change the shape control effect) I don't understand is that it's how this module is added, and added how modules into the child nodes of the nodes on the left, what is the specific forms of control, how to achieve such effect? And blue area with the right mouse button choose to load the background image in the following dialog