<I posted this in General Programming and not sure if this is best place for me to post, too.> Hi: I was trying to set up OpenGL libraries in my VS C++ 2008 then do the lesson 01 (Nehe). I followed the instructions for setup. Then I tried to compile one file. Since the glauxReplacement.cpp is incomplete, I used bmp.cpp/bmp.h from one of those threads and put bmp.h in header folder, bmp.cpp in source folder. Replaced the <h\glaux.h> with "bmp.h" Then I got this error: MSVCRTD.lib(crtexew.obj) : error LNK2019: unresolved external symbol _WinMain@16 referenced in function ___tmainCRTStartup I tried some modifications what some threads suggested. Project->Properties->System->SubSystem = Windows(...)options Then I got this error: 1>c:\users\<name>\documents\visual studio 2008\projects\practices\practices\bmp.cpp(56) : error C2664: 'LoadImageW' : cannot convert parameter 2 from 'const char *' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast I did this: Project->Properties->General->Character Set = Use Multi-Byte Character Set Then I got this error AGAIN: 1>MSVCRTD.lib(crtexew.obj) : error LNK2019: unresolved external symbol _WinMain@16 referenced in function ___tmainCRTStartup 1>C:\Users\<name>\Documents\Visual Studio 2008\Projects\Practices\Debug\Practices.exe : fatal error LNK1120: 1 unresolved externals The error kept loop. What is the solution? Thank you, TT

You need to actually define WinMain if you're going to set your subsystem to Windows.

Thanks for reply.

I added #define WinMain

then I got this error:

1>c:\program files\microsoft sdks\windows\v6.1\include\winbase.h(2561) : error C2059: syntax error : '('

In WinBase.h:

It shows:

WinMain (
__in HINSTANCE hInstance,
__in_opt HINSTANCE hPrevInstance,
__in LPSTR lpCmdLine,
__in int nShowCmd
);

It looks fine to me. What should I do to fix this?

Thank you,
TT

Krez and jpetrie:

Thank you for your replies. Yes, you are correct. Somehow, I followed the lesson 01 off Nehe website.

In the middle, it said to run the compiler. That's where I got errors at that point. Then, later on, in the bottom of Lesson01. It already included the definition of WinMain.

Now, it compiles just fine. My apologizes. :)

Thanks again,
TT