An integer representing the next available file number
Returns the next available file number for use in a FileOpen function
It is good programming practice to always use FreeFile to obtain a file number to use in the FileOpen procedure.
You should call FreeFile and store the returned
file number to a variable rather than passing the
FreeFile function directly as the
filenumber argument of the
FileOpen procedure. In this way, you save the
file handle for a subsequent call to the
After using the FreeFile function to retrieve a file handle, you should immediately call the FileOpen procedure, particularly if your file access code resides in a multithreaded application or component. Failure to do so may cause the same handle to be assigned to two different variables, so that one of the calls to FileOpen fails.
The names of function parameters become the function’s named arguments. Because of this, it is best to use meaningful names for parameters, and to avoid the use of Hungarian notation.