Getting many OpenGL Errors

Question

I'm trying to compile someone else's project, and I'm getting about 850 errors all related to OpenGL. I'm using Visual Studio 2008, on 64-bit Windows 7, but the project is a Win32 project.

As you can see, the errors below are from gl.h in the Windows SDK include folder under Program Files, not Program Files (x86) so I'm guessing that's part of the problem. I've tried adding the .NET 2003 include directory which has gl.h and is under Program Files (x86), but it's still trying to use the version of gl.h under Program Files.

Also, the project uses wxWidgets 2.4.2 and I can't find any instance of gl.h being included in the solution itself, so I'm not sure what's pulling it in.

Update: Still unable to compile this. The actual project I'm trying to compile is the "Interactive Digital Photomontage" tool (source code at the link). They include a VS2003 project file and instructions, which I followed carefully. I even tried building in VS2003 and got the same errors. I'm curious if anyone has a moment to try this on their system and see if they get the same errors. Requires wxWidgets 2.4.2 to be installed.

Any thoughts? I've included a sample of some of the errors below. Thanks.

1>C:\Program Files\Microsoft SDKs\Windows\v6.0A\\include\GL/gl.h(1152) : error C2144: syntax error : 'void' should be preceded by ';'
1>C:\Program Files\Microsoft SDKs\Windows\v6.0A\\include\GL/gl.h(1152) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>C:\Program Files\Microsoft SDKs\Windows\v6.0A\\include\GL/gl.h(1152) : error C2146: syntax error : missing ';' before identifier 'glAccum'
1>C:\Program Files\Microsoft SDKs\Windows\v6.0A\\include\GL/gl.h(1152) : error C2182: 'APIENTRY' : illegal use of type 'void'
1>C:\Program Files\Microsoft SDKs\Windows\v6.0A\\include\GL/gl.h(1152) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>C:\Program Files\Microsoft SDKs\Windows\v6.0A\\include\GL/gl.h(1153) : error C2144: syntax error : 'void' should be preceded by ';'
1>C:\Program Files\Microsoft SDKs\Windows\v6.0A\\include\GL/gl.h(1153) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>C:\Program Files\Microsoft SDKs\Windows\v6.0A\\include\GL/gl.h(1153) : error C2086: 'int WINGDIAPI' : redefinition

Answer 1

you need to include "windows.h" before "gl.h"

#include "windows.h"
#include "gl.h"