Adds the usage of IUnknown_GetWindow which requires _WIN32_IE >= _WIN32_IE_IE501 but #define _WIN32_IE 0x0500 in juce_BasicNativeHeaders.h. XP was bundled with IE6, so not sure why the IE version is set so low.
Better question, why am I building against SDK 7.1A? I’m building with VS2017 and in Projucer I have left Windows Target Platform blank, which should use latest 10 SDK. I have 7, 8 and 10 SDKs installed.
If you open the properties for your target in VS 2017, you can check that the “Windows SDK Version” field is set to this value. If some other value is being used, there may be an issue in the jucer project, or something may have broken during export. If the field is set to this value, then this might indicate a configuration issue on the build machine.
For me, the property pages dialog actually shows the $([Microsoft.Build.Utilities... line under “Windows SDK Version”. This property does only take effect if WindowsTargetPlatformVersion isn’t already defined, so perhaps it’s defined elsewhere in the project. If you search the project folder for this string, is it defined anywhere else? Alternatively, if you search for 7.0 in the project, can you find where that value is coming from?