#42003/3/17 10:35:57
filetype是系统函数，可以判断某个指定的文件的格式或指定文件是否存在。
语法格式：number := FileType("filename")
返回：
0 = no such file or error
1 = folder
2 = unpackaged file
3 = packaged file without runtime
4 = model
5 = sound
6 = movie
7 = PICS movie (mac)
8 = custom function
9 = text file
10 = application
11 = other
12 = library file
13 = packaged library file
14 = graphic file
15 = Xtra
真正的光明绝不是永没有黑暗的时间，只是永不被黑暗所湮没罢了；真正的英雄绝不是永没有卑下的情操，只是永不被卑下的情操所屈服罢了。
