set File/folder extent How to do?

[o70078]

我来自中国,对不起,我不会英语.
我喜欢B4A
在中国,学习B4A的人太少了
我想问,如何获取以及设置一个文件/文件夹的权限?
谢谢

translation :

I am Chinese.
I'm sorry, I can't speak English very well
I like B4A
In China,Too few people to learn B4A
kwan kin
set File/folder extent How to do?
thanks

 

[Erel]

See this tutorial: Text files

 

[o70078]

Thanks Erel
How to get root permissions?