I added this command: aspell -c "$(FULL_CURRENT_PATH)", and wha-la, it works!
Thanks Don Ho, your da bomb!
That sounds great butv where do I have to add this command to get notepad++ work with aspell?
Enter the command in the Run dialog box and save it assigning it to a hotkey combination.
Make sure aspell is in your path, otherwise you will have to enter the full path to aspell.exe.