In many cases of error messages with winetricks an update to the very latest version of winetricks will fix the issue; the repository winetricks is almost always at least slightly aged!
To test this I followed this excellent question and answer on Ask Ubuntu to update to the very latest winetricks:
How do I get the latest version of winetricks on Ubuntu?
Note that at the time of writing this answer this should give you the following version:
andrew@ithaca:~$ winetricks --version
20200412-next - sha256sum: 9ce444892e885bf7318b1f6c251dafb7a43fc26bb3078215f630e8a2b3f15874
Now the following command should be successful in installing the prerequisites and required dlls for TodoList, and certainly it worked well on my Ubuntu Focal Fossa 20.04 system:
winetricks --verbose comctl32 mfc42 vcrun6
And hopefully on yours as well :)
winetricks --version
and the latest version is '20200412-next'. If you have older version have a look here: https://askubuntu.com/q/755059/57576 – andrew.46 Aug 18 '20 at 01:13