Making a directory (possible?)

Can you make a directory. Say I want a place where I can save everything. Like put it in C:// or something, but altogether? Is it possible?:confused:

It's OS dependant
For windows - CreateDirectory()

for making a directory under DOS in C++,

Code:

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Interrupt based...
 
  use intdos() -- works under interrupt no. 0x21

input : ah=0x39
ds;dx=segment:offset address of dir name

Shell execution based:

    use system();

Library based:
   
    use mkdir(); under dir.h

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Thx fordy. Is there any info on those functions, or should I just goto MSDN, or google?

MSDN is the best place to go for info on WinAPI functions. Try here.