In UltraEdit there is Search - Incremental Search
. As you can read on the linked page, it positions the caret to first string found according to what you have already typed with selecting it.
This command does not highlight all occurrences of the string already entered as displayed in the status bar. If you want to highlight all occurrences of the word selected after the incremental search, hold SHIFT and double click on the selected word. This feature requires setting Shift+Double Click highlights all words which match word under caret
being enabled at Advanced - Configuration - Search - Advanced
. It is also possible to execute command View - Highlight All Selected
by key instead of using Shift+Double Click once you have assigned a hotkey to this command in key mapping configuration dialog.
Hm, I think it would be good for you (not for me) if the setting Use persistent highlight all
at Advanced - Configuration - Search - Advanced
would be also taken into account for Incremental Search
. I suggest to send a feature request email to IDM support with the suggestion to highlight all occurrences of currently entered string during and after an incremental search if Use persistent highlight all
is enabled in configuration.