|What kind of .PRN file do you mean?|
In both Lotus 1-2-3 and Excel there are .PRN file types
In Lotus it is described as a Formatted Text File
In Excel it is a Formatted Text Space Delimited file
Both of these file types probably do not need any special program to view.
Any text editor should work.
If your talking about a file that you did a Save As Print To File type .PRN,
which can contain all kinds of print codes then this may work.
Rename the .PRN file to .PS
Then use GSview to convert to a .PDF
Get GSview here:
After converting, open the newly created .PDF in Adobe Acrobat
Edit-Copy to Clipboard
Open Word and Paste