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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The defining of things such as GetClassName,
Window, etc by windows.h (and for that matter X as well) is a disaster. Having
said that it is difficult to not include them everywhere. For example if we didn’t
include windows.h in the header files but included it in the cxx file then the cxx
file would try to call or implement GetClassNameA but the header file would
have declared GetClassName. While VTK could probably hack its way around these
problems, very quickly we would run into user’s code that does</span></font></p>
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10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>#include <windows.h></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>#include <vtkFoo.h></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>and then the user would get lots of undefined
references, etc. This is a no win situation. The best solution is to avoid
using any names that are #defined by common libraries such as X and windows. (which
is why we have ColorWindow and ColorLevel instead of Window/Level in many
classes) unfortunately we caught onto this too late and are stuck with it. As I’ve
done more windows development I’ve found that life is generally much
easier if you bite the bullet and include windows.h. Not just because of this
issue but there are other issues you can bump into as well.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thanks</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Ken</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Including VTK headers includes windows.h which is a problem for me.</span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I have some #define conflicts (just an annoying compiler warning) but
also a more serious issues. For example, some of my classes have a
GetClassName method, as VTK does. This is changed to GetClassNameA as
GetClassName is a macro defined by including windows.h.</span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I have some strange behaviour with my app which I am porting from
Linux. I suspect this is the main problem.</span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I think that it is not a good thing that using VTK causes the inclusion
of windows.h</span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>This should only be done by the internal of concerned VTK
classes (few .cxx files) and windows.h should not figure in
vtkWin32Header.h.</span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>What's your opinion ?</span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
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