Sunday, 20 August 2006

Anyone managed to get eVC working on Windows Vista Beta 2?

My job involves a fair amount of C++ development for Pocket PCs and other Windows CE-based devices. I’ve been doing this for five years as of next week, so in that time I’ve used – and deployed projects developed with – eMbedded Visual C++ 3.0 with the Pocket PC 2000 SDK, the Pocket PC 2002 SDK, eMbedded Visual C++ 4.0 with Pocket PC 2003 SDK and now even a couple of things debugged with VS2005 (note: not compiled with VS2005 because they needed to be backwards compatible with PPC2003 and not redistribute the MFC 8.0 runtime – you can’t use the MFC 6ish supplied with the PPC2003 SDK with VS2005 because the headers won’t compile). To be able to upgrade to Windows Vista, compatibility with eVC is an absolute requirement – if it doesn’t work, I can’t upgrade.

(What about running under Virtual PC? Virtual PC doesn’t virtualise USB ports, new versions of ActiveSync don’t offer network sync, I don’t really fancy manual connection setup, and I can’t always rely on having devices with network support.)

Unfortunately it seems at the moment that eVC just doesn’t work under Vista. eVC 3.0 works with the Pocket PC 2000 SDK (only) installed, but as soon as you install the 2002 SDK (which shipped Platform Manager 4.0) it breaks, taking an access violation exception on opening a project. That’s installing with User Account Control enabled. With UAC disabled before installation, it doesn’t even get as far as an empty environment after installing the 2002 SDK.

eVC 4.0 barely even installs. If you launch Setup from the Program Compatibility Wizard, after setting Windows 2000 compatibility, it does install; using the default compatibility options (i.e. none) it crashes before even asking for the product key. I did find that a scripted build (using EVC /MAKE from the command line) would build for some platforms but not others, but again would crash on opening a project, making it impossible to debug. I’m guessing that UAC gets in the way of installing the SDKs to the right place.

This is a shame. I’d hoped that UAC would help with the myriad problems in trying to get eVC (either version) to work under a limited user account.

On Windows XP, to get them working as a limited user, both versions require users to have write-access to their installation directories. This stems from the Access/Jet database used to hold the processor type definitions, VCCEDB.MDB. Write access to this file is needed when running, and if you start more than one copy, Jet needs to create a ‘lock’ (.ldb) file in the same directory to manage concurrency. There are also registry keys which contain platform definitions under HKEY_LOCAL_MACHINE\Software\Microsoft\Windows CE Tools\Platform Manager, which contain things like the paths under Tools, Options, Directories. If eVC cannot write to this key, it creates an equivalent tree under HKEY_CURRENT_USER, but does not copy the original data, leaving you with a non-functional SDK. You have to copy the settings (maybe I should write a program to do this). I recall that there are other settings that you have to change the permissions on, but can’t recall what they are right now – it’s a while since I last had to do it.

eVC 4.0 also complains that it is unable to update its help system after you install any new SDKs. Running from a command prompt launched by makemeadmin doesn’t help, nor does running eVC as an administrator with Run As.

Somewhat related, VS.NET 2003 has a problem with device debugging as a limited user where it will fail to connect to a device that hasn’t been used for debugging before. You have to run as an admin (via makemeadmin) the first time you connect to a device (or the first time after cold booting). I surmise that some part or parts of the encryption keys are stored in a location that isn’t writable by a limited user.


ppcinfo said...

Did you ever get eVC++ 3.0 installed and working on your Vista machine? I'm running into the same issue, where I need the 2002/2003 Pocket PC and SmartPhone SDKs. Any advice would be helpful!


Anonymous said...

I upgraded my development PC from WinXP to Vista. After the upgrade to Vista, when I start evc++ 4.0 it crashes, however if you keep trying to start it after about 8 to 10 tries evc++ starts up and you can work with it.

Sad but true. Mike2

Anonymous said...

To run EVC++ 4.0 on Windows Vista enable the "Windows 98" compatibility mode (on EVC.EXE properties).