VS2017 build fails -> this is a simple Solution

[TimmvonderMehden]

Using just the VS2017.sln (i did it via cmd line build) will fail with

C:\dev\ext\TwainDSM\TWAIN_DSM\visual_studio\TWAIN_DSM_VS2017.vcxproj : warning : The build tools for v141 cannot be found. Install v141 to build using the v141 build tools.

Because the Solution is in fact a still a 2015 solution.

It might depend on your local VS2017/VS2015 installations, but it can be easily fixed by opening TWAIN_DSM_VS2017.sln and changing just

# Visual Studio 14
to
# Visual Studio 15

and everything works like a charm :)