i want to develop an extension in Chrome that will display an image above an html element that when clicked will launch an external Windows app.
Is it necessary to develop a NPAPI Plugin for such a thing?
Is there a simpler way to call an external app with Chrome?
Do you know any good and simple tutorials for NPAPI Plugin Development?
The Windows app can register a custom protocol handler. You can register a custom protocol for the app that will pass the image URL to the app. E.g. myapp://example.com/img.png or something similar.
A good example of this is iTunes. It registers itms and online app pages offer to open iTunes to the app specified. The URL opened is itms://itunes.apple.com/us/app/google+/id447119634?mt=8.