IsFile()
语法
Result = IsFile(#File)概要
Tests if the given file number is a valid and correctly initialized file.
参数
#File The file to use.
返回值
Returns nonzero if #File is a valid file and zero otherwise.
Remarks
This function is bulletproof and may be used with any value. This is the correct way to ensure a file is ready to use.
参阅
CreateFile(), OpenFile(), ReadFile()
已支持操作系统
所有