Messages

AGS Editor:
-Can be used from a USB stick without installing anything to the hard drive
-Compiler built-in
-It's a .exe so you don't need to already have a compiler to compile the IDE and compiler
-Every version's system requirements are clearly listed
-Help files included

Other IDEs:
-Install things on the hard drive even if you select a USB stick as the target directory.
-Don't include compilers, so you have to go find a compatible one.
-Source code only. Being able to edit it is cool,  but there's a catch-22 of needing another program to actually use it, which of course is also source code only. An endless cycle!
-Who cares about system requirements? Just stop being poor!
-Help files require an internet connection. You can't include an extra 5 Mb, not even on the side? (Or they're included, but in Chinese)

Rant over.
Tl:dr, what are some good C++ IDEs or Lua IDEs which I can run from a USB stick on my old Windows XP PC, and which come in .exe form?

While in the middle of a conversation, the player character can't do anything besides reply with the given dialogue options. I'd like to be able to make it so that the player can, what say, whip out his cell phone and reply to a text while also holding a conversation in person. So you'd have the dialogue options on the screen, but you'd also be able to do something else simultaneously with the keyboard. Although I think you have to finish a dialogue before doing something else because it's a blocking function? And I don't just want a dialogue option such as "(reply to text/do whatever)". The button for performing an action in-conversation should be the same as the button for performing the same action outside of a conversation, for convenience. How should I go about doing this?