Simple question-How to save txt file with extension

[practicer]

I used the common dialog object to save contents in editbox. When I input the filename and click OK button, it is just shown the filename.
I also have used the File Object and Powerful Dialogs Object but failed!
How to save a txt file with extension and you don't need to input the extension manually?
I will appreciate if you show me an example.
Regards!

[Danny]

There are two ways you can do this:

1) The editbox has a built-in save selector dialog. Just do this action: Files > Save Text File via Selector

2) You can use the File Object to bring up the save dialog then use Files > Save Text File (retrieve the save dialog filename expression)