This is the filename. You may treat this as you like.
Return Value
On success, return a non 0 number.
On failure, return 0.
Remarks
You MUST open the file and return a handle for future file function calls. Cast the handle to an unsigned int when returning it, then in other callbacks, cast it back from the unsigned int back to your own handle type.
Return 0 signifies an open error. This is very important.
It is a good idea if you are using memory based file routines, to store the size of the file here, as it is needed to support SEEK_END in the seek function, described below.
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Supported on the following platforms : Win32, WinCE, Linux, Macintosh, XBox, GameCube
