The ants will not walk across baby powder. I had some get in the cracks of my dining room windows and get all over my house plants. All I did was sprinkle baby powder along the window ledge and on the table with my plants. They either died from walking on it or left entirely, but I never had a problem with them again. I also sprinkled some around their holes, last year, in the driveway and so far, this year, I only see a few holes. Last year they were everywhere in the driveway. I will be sprinkling them again.
I think I'll wait to take pix until more of my stuff is up and blooming, but I will take some, soon.:-)