Printing a report without preview not working in Windows10

I have been using 'Printing a report without preview' as described below:

https://msdn.microsoft.com/en-us/library/ms252091.aspx

I now find with Windows10 it is not working - It is not displaying the font correctly.

It now only works on the Windows 7 computers. Print using the preview works on all computers.

The printer is an old Label printer and it doesn't have Windows10 drivers. But I can print OK if I use the normal print preview.

Any ideas what is going wrong?