EZ_GetOS Returns Incorrect Value

[Frank Kelley]

Under EZGUI 5.0, calling EZ_GetOS(0) returns a value of 501 on my Win7/64 machine. The docs claim this value should be 601.

ADDED: Actually, this is NOT a problem with EZGUI. Windows GETVERSIONEX also returns 5.01 on my version of Win7. Anyone else notice this behavior?

[Dan Gin zel]

My 64-bit Windows 7 system returns 601.

Do you have some compatibility features enabled ?

[Chris Boss]

The docs are correct.

Windows 7 should generate a version of 601.

Was the computer originally Windows XP and the upgraded to Windows 7 ?

The version number generated by EZGUI is based on a call to GetVersionEx. The major version number returned is multipled by 100 (ie. 6 x 100 = 600) and then the minor version value is added to it (ie. 600 + 1 = 601).

Here is some code from MSDN :

http://msdn.microsoft.com/en-us/library/windows/desktop/ms724429(v=vs.85).aspx

and it shows Windows 7 as 601.

[Chris Boss]

Here is another web page from MSDN and if you scroll down you will see a list of the values for major/minor version numbers for each OS:

http://msdn.microsoft.com/en-us/library/windows/desktop/ms724833(v=vs.85).aspx

Remeber, EZGUI multiples the major version number by 100 and then adds the minor version number.

[Frank Kelley]

This is a completely new machine with a fresh install of Win7/64 from scratch. No compatibility features have been enabled. Both EZ_GetOS(0) and GetVersionEx return 501/5.01 respectively.

[Chris Boss]

That is very strange !

The API docs say Windows 7 should be 6.01 (or 601 with EZ_GetOS).

You might want to do a Google search for GetVersionEx to see if anyone else has experienced a worng value.

Could be some kind of windows bug, don't know.

[Chris Boss]

Make sure your application uses a manifest !

If Windows 7 runs an app which has no manifest, it may assume it requires XP compatibility mode and GetVersionEx may return a value for XP, rather than Windows 7.

The EZGUI 5.0 designer has theme support built in, so it can generate a proper manifest for the resources.

[Frank Kelley]

The application in question is using a manifest. And my Win7 has been updated to SP1. I am compiling under PB10 and using EZGUI 5.0. This is definitely not an EZGUI problem, because GetVersionEx is also reporting the same information. I have a second Win7 machine (laptop) and I need to test there to determine if this is just a problem with my new development machine or not.

[Frank Kelley]

Problem solved.

My development suite includes JellyFish Pro and Lynx.  I had Lynx set to XP compatibility mode and that is apparently the determining factor for the version number.  If I compile and run the program within Lynx/JellyFish I get a version of 5.01.  If I double-click the compiled .exe to run the app standalone, I get 6.01.

The solution was to remove the compatibility setting for Lynx. This gives me 6.01 consistently. I recall setting the compatibility for Lynx to XP because I had some problems getting Lynx to run initially on the Win7 machine and tried that as the solution.

Thanks.