From ENT Wiki
The Screenshot Uploader (sSUP) tool automatically uploads screenshots from Warcraft 3 to avoid manipulation of the file(s).
How to use it
- Download it.
- Start it and enter your battle.net username and select the Warcraft 3 screenshot folder path.
- You are ready. Press the print screen button and it will start uploading the screenshot.
If you receive errors or have further questions, feel free to ask here.