HID.DLL compatibility across OS versions

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4 total messages Started by GB Wed, 15 Mar 2006 18:36

#4103

Author: GB
Date: Wed, 15 Mar 2006 18:36

11 lines
1296 bytes

Hi,

I'm using hid.dll to locate USB devices in my C++ Builder
5 project.  It works fine, but only on one platform.  That is
if I compile using XP's hid.dll (after implib to hid.lib) then the
app runs under XP, but not 2k or 98se.  Same with the other
platforms.  I implib the dll for that OS, then build it, the program
works for that OS but no other.  What gives?  I should at least
be able to work across 2K and XP methinks.

GB

Re: HID.DLL compatibility across OS versions

#4104

Author: Remy Lebeau (TeamB)
Date: Thu, 16 Mar 2006 00:55

18 lines
1490 bytes

"GB" <nospam_grant@genovation.com> wrote in message
news:44185ea4$1@newsgroups.borland.com...

> if I compile using XP's hid.dll (after implib to hid.lib) then
> the app runs under XP, but not 2k or 98se.
<snip>
> I implib the dll for that OS, then build it, the program works
> for that OS but no other.

Why not?  Please be more specific.

You will probably have to use LoadLibrary() and GetProcAddress() to load the
OS's version of hid.dll dynamically at runtime.  Then you do not need to use
implib at all, or recompile your code for each platform.


Gambit

Re: HID.DLL compatibility across OS versions

#4112

Author: GB
Date: Fri, 17 Mar 2006 00:23

21 lines
1855 bytes

> You will probably have to use LoadLibrary() and GetProcAddress() to load
the
> OS's version of hid.dll dynamically at runtime.  Then you do not need to
use
> implib at all, or recompile your code for each platform.

OK, thanks... I'll do that as a last resort.  I have discovered that the
USB portion of the code (HidD_GetHidGuid, SetupDiGetClassDevs,
SetupDiEnumDeviceInterfaces, etc) works fine using CBuilder 1.0.
With CBuilder 1.0 I can use *any* version of the OS DLL's and implib
them and the EXE runs under *any* OS.  I need that functionality
with CBuilder 5.0.

I've tried it with and without 5.0's Upgrade 1 pack and I tried importing
the CBuilder 1.0's MAK file into CBuilder 5.  The import went OK and
the file compiles and links, but just like my earlier 5.0 efforts it doesn't
run on any other OS without a recompile using that OS's DLL's -> LIB.
The errors I get are basically "bad handle".

Ugh,
GB

Re: HID.DLL compatibility across OS versions

#4118

Author: GB
Date: Fri, 17 Mar 2006 22:55

5 lines
1076 bytes

> You will probably have to use LoadLibrary() and GetProcAddress() ...

Seems to be the ticket.  That worked fine.

GB

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