[Qt-interest] [ActiveQt]WINVER set incorrectly

[Jonathan Locke]

I'm using the ActiveQt library to create an ActiveX component that uses 
another proprietary interface. To do this, my class subclasses 
QAxAggregated, as well as the custom interface class. I have the IDL for 
the interface, and I've used MIDL to generate the .h and .c files. 
However, when I try to compile my project, I get an error from the 
<interface>_p.c file generated by MIDL - it tells me that I need to be 
using Windows 2000 or later in order to run this stub. However, I am 
using Windows XP SP2. The error in question is thrown by a preprocessor 
statement, which checks a define called TARGET_IS_NT50_OR_LATER. That 
define is set in rpcndr.h, based on _WIN32_WINNT and WINVER.

In summary, my compiler is incorrectly assuming that I'm using something 
earlier than Windows 2000 when I'm actually using Windows XP. I see that 
when moc is run on my files, one of the arguments passed to it is to 
define WINVER as 0x501 (ie Windows XP). If I manually define WINVER 
myself in my Visual Studio project settings, I get an error from moc 
saying I cant pass it more than one input file. Defining WINVER in my 
class or in the <interface>_p.c has no effect, but defining 
TARGET_IS_NT50_OR_LATER as 1 does of course let me compile that file. 
However, I get linker errors later on, so I'm guessing that the cause of 
the compiler guessing that I am using the wrong version of windows might 
well be involved.

I am using Visual Studio 2005 on Windows XP SP2, and I do include 
windows.h in my main class header file.

Any help would be appreciated.