This question extends a previous one. The previous answer stated that the pop-up window to search the user's computer for a file to upload is called using . I am not certain how to make the call from within the form_submit function and have searched the core code for an example without success. I know that add content has a widget to add an image file, but I cannot find the code generating it. I even did a file search for the word "Browse" which is the title of the button without finding a single file.
Does anyone have an example of how I would direct a call to a browser function from within the Drupal form? OR Does anyone know where the add content form widget for adding a file is at?