Cannot decode database file: file signature mismatch

[snowman]

when open OLLYDBG.HLP file

[SpareSimian]

From searching around, it appears there are at least two generations of the HLP file format. It looks like this app understands those starting with 0x4C, 0x4E. I'm trying to read some from Word Perfect Office and they start with 0x3F, 0x5F. Both are listed here: https://www.garykessler.net/library/file_sigs.html

[dcoshea]

I think those are Windows help files - I'm pretty sure both OllyDbg and Word Perfect Office are Windows products? This is for DOS help files in Microsoft's QuickHelp format.

I'm trying to read some from Word Perfect Office and they start with 0x3F, 0x5F. Both are listed here: https://www.garykessler.net/library/file_sigs.html

That link confirms that that signature is for a "Windows Help file" (while it seems to not be the only signature for such a file).

QWinHelp appears to be a viewer that can presumably open Windows .HLP files, because it says it's based on helpdeco, which definitely can decompile Windows .HLP files to .RTF files.

It would probably be nice if this DosHelp tool detected the Windows .HLP signature(s) and explained that they're the wrong type of help file.