Visual Basic 6’s MkDir command, as well as the DOS MD command, can create only one subdirectory and fail if any subdirectory on the specified path doesn’t exist:

' This VB6 statement fails if C:MyApp doesn't existMKDIR "c:MyAppMyDir"

Conversely, the Directory.CreateDirectory method of Visual Basic .NET creates a directory, and all the intermediate directories on the path, if necessary:

' Next VB.NET line works even if the C:MyApp directory doesn't exist yet.Directory.CreateDirectory("C:MyAppData")