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There is CreateHardLink function to create Hardlinks.(Since Win2000)
And there is CreateSymbolicLink function since Vista has been released.
But why isn't there a CreateJunction?
How does mklink make a junction?
And How do I write codes to make junction in my app?
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Junction Points (also commonly referred to as NTFS Junction or Directory Junction) is a type of reparse point which contains a link to a directory that acts as an alias of that directory. Junction points are a Windows exclusive feature, absent in other operating systems.
A. Directory junctions allow you to join folders together so you can map a directory to any local target directory. Imagine you had three folders, c:\folder1, c:\folder2 and c:\documents.
They're reparse points, so FSCTL_SET_REPARSE_POINT is the magic FSCTL. Here's an example, never tried it but seems right:
http://www.flexhex.com/docs/articles/hard-links.phtml
-scott
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There's currently no built-in single function for creating junctions like there is for symbolic links or hard links. Like snoone said, it's a reparse point, so you have to use DeviceIoControl to interact with it. If I remember correctly, the source he linked is the same source I played around with when I was trying to figure this out, and I don't think I ran into any issues with it.
Alternatively, if you're not against using an external library in your application, and you're going to need functionality for reading/checking/deleting junctions, you might want to look into reparselib, which is a pretty decent library wrapping junctions, symbolic links, mount points, and custom reparse points.
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