A macro to force print selection to PDF

Hi there I have scrolling through the forums and google looking for a macro to change from any printer to force to print to PDF. I will be running it off a push button from the excel sheet im using.
The excel sheet is being used by multiple users on an office netwrok environment, so their default printers may be different from user to user but the PDF program is all the same.
I appreaciate any help that may be given. PS I am a relitively new learner to macros, but im managing to just hold my own with what im building.

Thanks in advance Clydie