This is also a problem of the Perl compatible regular expression engine. That the find dialog does not get automatically the focus if selected No or Cancel or simply hit ESC key when the search as reached the bottom or top of the file and the question dialog is shown happens only with the Perl engine AND when the option Regular Expression is active in the find dialog.
I did not know of this specific focus problem till today. I will report it to IDM by email. You should do the same.
I have only noticed and reported that this dialog is also shown when a regular expression search with active Perl engine is executed from within a macro. While running a macro a search downwards should always stop at bottom of the file and a search upwards at top of the file without automatic continue on the other end of the file or with user interaction. So nobody should use Perl regex searches at the moment (v12.10a) within a macro except for Replace All.
On Windows 9x the hot key Alt+F6 switches to the next dialog/window of the same program and Alt+Shift+F6 to the previous dialog/window. So it is possible on Win98 to switch back to the Find dialog at this situation with Alt+F6. I cannot test at the moment if this hot key also works for Win2K and WinXP.
Maybe some other users have already noticed that Alt+F6 and Alt+Shift+F6 cannot be assigned in the key mapping configuration dialog to a command. Now you know why.
For other standard Windows shortcuts see the Microsoft page Keyboard Assistance
. Well, Alt+F6 is not listed anywhere at the pages there. It's really a secret hot key.