First, there is no regular cursor section here where you can upload cursors. There is on the other hand a Cursor XP section, which is a program for Windows 2000/XP that enables people to have real cool cursors with cool effects on them.
Second, to take screenshots of your cursors, go in your Mouse Properties and take a couple of snapshots of the different cursors then do a little montage in Photoshop (or whatever), save it as a JPG and voila, you're done.
Third, how the heck do you make a cursor in C++? Cursors are graphic files... Unless what you meant is that you made an installer for it in C++? Whatever, can't uplaod it here unless it's a Cursor XP file.