You can use CreateDirectory Win API function.

DECLARE INTEGER CreateDirectory IN WIN32API ;
    STRING lpPathName, INTEGER lpSecurityAttributes
? CreateDirectory("C:\Test",0)
? CreateDirectory("C:\Test\TEST2",0)
? CreateDirectory("C:\Test\TEST2\test3",0)
? CreateDirectory("C:\Test\TEST2\test3\TeSt4",0)

>I am using the MKDIR command to generate a folder structure on the server whenever the end user creates a new case in a CMS system.
>
>It is working fine, except for this really quirky behavior. It would appear that there is no way to control the case (i.e. upper or lower case) of the folder created by MKDIR.
>
>Here is the code I use:
>
<snip>