I will be watching for the answer too. I have two min pins. Create them at night. First thing in the am I let them out, watch that they do their business. I let them back in, feed and water them. Once they are finished eating I actually set a timer for 20 minutes. I pick up the food and let them out again. Once they are back inside all I can do is watch their every move. Every time they wake up or roam to another room, I let them out.
Come 5 p.m. I feed them again and do the same routine as in the am. Set the timer, let them out, pick up the food. For the next few hours I once again monitor them. Come about 10 pm I let them out one last time. When they come in I create them for the night. However I feel like I am the one getting trained. Because they will go inside if I do not catch them.
My mother has a chi that hates winter and snow. But this dog will go to the back door and bark when she wants out. AND she does NOT have accidents. My mother did less than I am doing now when she got her. Never picked up the food, let her out about 4 times a day. And this was her reward :) There has to be an easier way? I love my dogs. But like I said there has to be a way so that I am not constantly watching their every move. So if anyone has any magic tricks. I sure would love to hear them. Good luck with your dogs also. Thanks in advance. Have a great day.