XnView Software

Technically invoking ShellExecute for every file will do the trick, right? Only that it is a little bit slow. Other software warns over 10 selected files as "Are you sure you want to open 25 files?"

Often working with multiple files comes the need to open/edit these in an image editor.
Here is my case - I configured as external editor Photoshop. Then, working with images for a catalog, editing (downsizing, adjusting, etc.) is needed with the external editor (here forget the built-in editing ...