How do I call other appications (with arguments) from a VB 6 program?

I tried to use the Shell function and it works ok if I do not give any arguments to the program I want to use, but for example, I would like to open a PDF file with Acrobat Reader. I did something like the example in MSDN online: Shell("""C:\Program Files\Adobe\Acrobat\Reader\AcroRD32.exe"" my_pdf.pdf") But it doesn't work. I started thinking that I'm trying to do something in Windows, the Linux way (using shells) So if this is not the way to Open a new Program and tell it to open a file automatically, How can this be done? Thanks.