I have this funny problem. In my windows 7 32bit and clarion 6.3; recently when I press F1 from clarion it opens windows help which doesn’t not recognize the help files although the clarion help files (.hlp) open normally by default in windows explorer but not from clarion. (few months back is was ok)
What works for me in Windows 10 is I have a WinHlp32.exe in a folder that I can double click on to open WinHelp. it lets me pick an HLP file to view, like C55Help.HLP. That EXE is dated 4/14/2008 and properties show it is 5.1.2600.5512. Not sure where I got it, maybe XP or 8.1.
You have to do this since winhlp32.exe is owned by TrustedInstaller
and I’ve never found a way in Windows 10 to take ownership.
The only other way is to start winhlp32.exe in this folder and it will
allow you to select the HLP file you want to open.
If someone knows how to overcome TrusedInstaller then you can replace
the winhlp32.exe in the Windows folder and it should just work.
If you reboot in Safe Mode (with F8 or msconfig) it lets you take ownership of winhlp32.exe on Windows folder, File properties, Security, Advanced options, button Change, select your user or group with administrative rights. Then Apply. Close the two windows, open again File properties, Security, Edit, then select Allow Total Control for Administrators group, rename it, then you can copy on Windows folders winhlp32 files. I’ve just done that and F1 works
Another thread on 2017-07-08 “FYI: C63 HLP Blank Search Tab on W10”:
If you followed indications on thread “C63 help ( .hlp ) and Win10” from 04-17-2017 and noticed C6 help shows only a blank sheet on Search tab, you need FTSRCH.DLL on Windows or System32 folder.
I once faced this problem and I remember solving it the way you described (which I totally forgot although it took a lot of efforts then). now you gave me the start and I will post the solution if I succeed (which I am sure it will because it worked before)