Opening "save as..." dialog from :ex command

When I "save as..." a file from the menu, I get the usual windows "save as..." dialog, but when I save using the :sav command, I can only use vim file name completion. Is there a way to open the "save as..." dialog using an ex command?

Thanks.

How do I open the Save As dialog box?

On the File menu, click Save As to open the Save As dialog box. This lets you save a copy of the open project as a template or as a new project with a different name and location. The Save As dialog box is a standard Windows dialog box.

How many time the dialog box for Save As displays when you choose Save As option?

The Save As dialog box appears two times when you try to save a file in Word.