Introduction - If you have any usage issues, please Google them yourself
VB Form to switch the code over to open sub-windows of different colors, mainly to learn about VB Form control. In the window there are three represents red, yellow, and green button, the time when you click, pop-up form that corresponds to the color of the background, once again click on the other, will switch to the other corresponding to the color up, in fact this results are not too common, but the study does have a useful operating mechanism form.