Hi. I just got my OpenGL Game Programming book. The book is nice. However, when I try to compile any of source codes, I get these errors.

These errors are from chapter 5. I am using Visual Studio 2013. The source codes are available here: http://glbook.gamedev.net/GLBOOK/glbook.gamedev.net/source.html

1>------ Build started: Project: GLProject, Configuration: Release Win32 ------ 1> Source.cpp 1>Source.cpp(223): error C2440: '=' : cannot convert from 'const char [20]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(228): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [36]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(254): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [108]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(305): error C2664: 'HWND CreateWindowExW(DWORD,LPCWSTR,LPCWSTR,DWORD,int,int,int,int,HWND,HMENU,HINSTANCE,LPVOID)' : cannot convert argument 2 from 'const char [20]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(310): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [24]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(317): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [32]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(347): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [39]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(354): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [27]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(361): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [42]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(368): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [44]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(383): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [22]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(411): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [36]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(417): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [35]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(426): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [33]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(433): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [25]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(438): error C2664: 'BOOL UnregisterClassW(LPCWSTR,HINSTANCE)' : cannot convert argument 1 from 'const char [20]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(440): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [34]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Please tell me how to fix this problem.

Hi. I just got my OpenGL Game Programming book. The book is nice. However, when I try to compile any of source codes, I get these errors.

These errors are from chapter 5. I am using Visual Studio 2013. The source codes are available here: http://glbook.gamedev.net/GLBOOK/glbook.gamedev.net/source.html

1>------ Build started: Project: GLProject, Configuration: Release Win32 ------ 1> Source.cpp 1>Source.cpp(223): error C2440: '=' : cannot convert from 'const char [20]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(228): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [36]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(254): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [108]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(305): error C2664: 'HWND CreateWindowExW(DWORD,LPCWSTR,LPCWSTR,DWORD,int,int,int,int,HWND,HMENU,HINSTANCE,LPVOID)' : cannot convert argument 2 from 'const char [20]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(310): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [24]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(317): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [32]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(347): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [39]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(354): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [27]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(361): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [42]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(368): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [44]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(383): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [22]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(411): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [36]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(417): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [35]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(426): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [33]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(433): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [25]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(438): error C2664: 'BOOL UnregisterClassW(LPCWSTR,HINSTANCE)' : cannot convert argument 1 from 'const char [20]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(440): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [34]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Please tell me how to fix this problem.

Good thing it didn't work, OpenGL changed a lot since that book was published - you should consider it historical. Look elsewhere.

Hi. I just got my OpenGL Game Programming book. The book is nice. However, when I try to compile any of source codes, I get these errors.

These errors are from chapter 5. I am using Visual Studio 2013. The source codes are available here: http://glbook.gamedev.net/GLBOOK/glbook.gamedev.net/source.html

1>------ Build started: Project: GLProject, Configuration: Release Win32 ------ 1> Source.cpp 1>Source.cpp(223): error C2440: '=' : cannot convert from 'const char [20]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(228): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [36]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(254): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [108]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(305): error C2664: 'HWND CreateWindowExW(DWORD,LPCWSTR,LPCWSTR,DWORD,int,int,int,int,HWND,HMENU,HINSTANCE,LPVOID)' : cannot convert argument 2 from 'const char [20]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(310): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [24]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(317): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [32]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(347): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [39]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(354): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [27]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(361): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [42]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(368): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [44]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(383): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [22]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(411): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [36]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(417): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [35]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(426): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [33]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(433): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [25]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(438): error C2664: 'BOOL UnregisterClassW(LPCWSTR,HINSTANCE)' : cannot convert argument 1 from 'const char [20]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>Source.cpp(440): error C2664: 'int MessageBoxW(HWND,LPCWSTR,LPCWSTR,UINT)' : cannot convert argument 2 from 'const char [34]' to 'LPCWSTR' 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Please tell me how to fix this problem.

Good thing it didn't work, OpenGL changed a lot since that book was published - you should consider it historical. Look elsewhere.

Thanks for the reply. I don't think the problem was deprecated OpenGL features present in the book. Also, just because you said "look elsewhere" doesn't make your answer the best one.

georger.araujo was right. it's because the book is too old. I solved the problem after I googled "create a window". Thanks guys.

Thanks for the reply. I don't think the problem was deprecated OpenGL features present in the book. Also, just because you said "look elsewhere" doesn't make your answer the best one.

While I fully acknowledge looking elsewhere won't help you to get the project to build successfully, I still recommend that you look for more current OpenGL resources. Since the book was released in 2002 it only covers the fixed function pipeline - you'll find nothing about programmable shaders. For a good explanation why it's better to learn programmable rather than fixed functionality, see this.

If you decide to work through the book anyway, fine, just bear in mind that you'll still need to spend time and effort later to learn modern OpenGL - why not do it now?