Nor is there any reason to do so in TCC -- why were you attempting it?
I've been experimenting with different ways of displaying F1/Ctrl-F1 help in a plugin. I spent a long time working on showing it below the command line with a continue prompt which erased it. But that fails miserably when the command line in-progress is near the bottom of the console screen buffer (and I'm pretty sure I shouldn't be scrolling when you're keeping track of the position of the command line).
My latest attempt shows the F1 help in an alternate console screen buffer with a continue prompt when _TCTAB is 0 (that was rather easy with the help of @CONSOLEB), and the old way when _TCTAB is 1 (below the command line, no erasing, which, as I said, is unsatisfactory when near the bottom of the buffer).
Is there a way I can cause the prompt and command-line-in-progress to be shown again, after the help message ... i.e., in a different place?