This is what I'm doing: (using VB 2010 Express) Dim showFile as Double showFile = Shell("C:\...POWERPNT.EXE /S C:\Users\MyName\Folder with Files\" & _ "pptFile.ppsx", vbNormalFocus) When I execute the program a message says: "PowerPoint cannot read: C:\Users\MyName\Folder ." then I click OK on the message box and it continues: "PowerPoint cannot read: with Files\pptFile.ppsx" Clearly there's something with the folder's name. I've already defined a variable String for the full file's name and then concatenated; no help. Please help! This is my first post in this Forum. Forgive any mistakes. Glad to be here! Peter