DOS Box still isn't working

I did what you told me to and I tried to make a shortcut, in this format:

C:\Program Files\DOSBox-0.73\dosbox.exe-c mount C:\Users\Robert Blackwelder\Desktop\QBASIC.EXE

I thought that was what you had told me to do atleast, it says that it can't find the C:Program File
whenever I try it with just: C:\Program Files\DOSBox-0.73\dosbox.exe.

It works and makes the shortcut so I know it is the last line from mount and on, what do I do? I can't figure it out.