I need to create a simple Xojo app that will monitor a PowerPoint presentation (every 300ms) that is on another monitor and then launch some code when the color of a small box (20 pixels square) changes to a specific color. I understand how the timer functions, so I need information about how to grab the pixels on another screen and examine their values.
When I search the forum for info about this, most of the articles about grabbing pixels are very old, so I would like to know the most up-to-date way to do this and which Xojo features would be best. One of the challenges is that the PowerPoint presentation is on a separate monitor of a multi-monitor system, so the code needs to be able to access the appropriate screen.
Thanks in advance for your help - any guidance would be appreciated.