Comment by SigmundA

I wasn't talking about MFC or VB or any higher level abstraction, I specifically was talking about the base Win16/32 GDI gui system that windows started with.

You can take an immediate mode api and abstract it with a retained mode api. My question was is Win32 / GDI immediate.

There was plenty of pure C windows programs and C++ ones that just used Win32.

ImgGui actually uses a retained mode graphics interface so it only sends changes to the GPU while making it look "immediate" thing is its creating internal state and tracking it so its not smash and replace at the driver level.

Win32 / GDI is mostly smash and replace in WM_PAINT, common controls library will abstract it, but looks a lot like ImgGui in that is uses window handles as ID's for internal state while ImgGui has its ID stack which is just a primitive object state system.

The more I look at ImgGui the less immediate it seems, its just a function based api to a retained mode graphic system that tries to hide the state tracking from you by not always exposing the object handle, mostly.