Using the HtmlViewer to display a web page. The page provides a means to upload a file. One can either tap a button (to get open file dialog) or drag the file onto the page.
Where is the button? Is it a button on the HTML layout or a Xojo button? A Xojo button ON TOP OF an HTMLviewer is unlikely to do much of anything. You will need a button being part of the HTML in the viewer. You will then have to use javascript in the viewer to send a message to the Xojo side of the app to put up an open file dialog, and send the result back to the HTMLViewer.
The button is on the web page we’re looking at. It’s not something in the app. We’re just using the HTML viewer to look at a specific page.
The app is designed to simplify a process that used to have several pages of instructions. It basically lets users interact with two web sites without having them deal with navigation.