It would be real nice if we could hit F1 when on InputBlock and get popup info on the API.
But it probably would not be easy converting those Hxi and Hxs files to a big .hlp file.
In which IDE?
I just finished an addin for Pelles POIDE which will let you do just that... directly launches the SDK's DEXPLORE.EXE program with keyword lookup... You can get the addin ...
HERE (also attached below) Its C code but it's not complex, so it should be possible to take the way it's done and adapt it to other IDE's without too much trouble... So long as you have access to the keyword under the cursor, it should work.
The command line is a pain but it's not unmanageable...
<path to dexplore.exe> /HELPCOL <location information> /LAUNCHFKEYWORDTOPIC <Keyword>
You can get a look at the /helpcol info for your installation by right clicking the SDK Documentation in your start menu and selecting properties...
In Canada/English it is ... MS-Help://MS.W7SDK.1033 ... but it will be different in Europe, Asia, etc.
For Canada, on Win7 x64 ...
C:\Program Files (x86)\Common Files\microsoft shared\Help 9\dexplore.exe /helpcol MS-Help://MS.W7SDK.1033 /launchfkeywordtopic
So, when looking up FindFirstFile the complete command line is...
C:\Program Files (x86)\Common Files\microsoft shared\Help 9\dexplore.exe /helpcol MS-Help://MS.W7SDK.1033 /launchfkeywordtopic FindFirstFile
It shouldn't be too much trouble to cobble up a Tool, plugin, addon or whatever with this info in hand.