In USD, there is an action called DisplayMessage. This action displays a message box to the user. For example, if we create an action on DesktopReady to display some text, note we can provide the actual text of message box and the caption:
When USD loads, you will see the message:
THANKS FOR READING. BEFORE YOU LEAVE, I NEED YOUR HELP.
I AM SPENDING MORE TIME THESE DAYS CREATING YOUTUBE VIDEOS TO HELP PEOPLE LEARN THE MICROSOFT POWER PLATFORM.
IF YOU WOULD LIKE TO SEE HOW I BUILD APPS, OR FIND SOMETHING USEFUL READING MY BLOG, I WOULD REALLY APPRECIATE YOU SUBSCRIBING TO MY YOUTUBE CHANNEL.
THANK YOU, AND LET'S KEEP LEARNING TOGETHER.
CARL