use which machine language to create GUI and call sas code?

[blueskyxyz]

1. develop a GUI to implement some functions, like import data(proc import), create some certain table or figure

2. use GUI to call sas code 

[AllanBowe]

The best language for writing GUIs is..  JavaScript!

And my team have built an entire framework for building SAS Apps with JavaScript.  We also have a bunch of demo apps (GUIs), see:  https://github.com/search?q=topic%3Asasjs-app+org%3Asasjs+fork%3Atrue

[AlanC]

Raw javascript is, well, less than palatable IMO. I would suggest a framework that hides JS a lot (ex. ASP.NET, React, Vue) if web is goal. I personally use Blazor (web assembly) but that is a bit much if starting out.

If you dont need a web interface, you can use WPF or WinForms. If you need cross-platform, look at WinUI. If you want it simple, look at PowerApps.

You can call Allan's library using any of the above. Not an either/or situation.