>Through Remote desktop I let user use an app on their cell phones. At one point they see a phone number on a command button. How can I let the user call that number? This is easy to do on a web site but seems more complicated with an app. I guess that it could be done with Javascript.
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>What do you suggest?

They're using a Remote Desktop connection through their cell phone? So the VFP9?? app is running on the Windows machine. And you want to get the information from the button they see on their phone to then be available for them to dial on their phone?

Create a website and setup some event so when they click the button on their phone which clicks the button on the running VFP app, it causes a new dial.html page to be created which has the number built-in so they can launch that app and get the number.

In the alternative, create an app on the phone which monitors a remote server and push a message to it with the information, which the app on the phone will trigger on and act. This is probably the most seamless / clean way to do it.

Am curious to hear other answers.