Running Simulink models from Visual Studio

I have compiled all subsystems of a big, complex, Simulink model into a series of dlls. All of them are working in Visual Studio except one. The one that is not working is the only one that requires the simstruc.h header file, and I get about 120 error messages when I try to compile them. Most of them are in simstruc.h, but also in subsequent includes, like sfcn_bridge.h for example. All of them look the same way:

error C2143: syntax error : missing ';' before '*' c:\matlabr2011b_x86\rtw\c\src\sfcn_bridge.h (37) error C4430: missing type specifier - int assumed. Note: C++ does not support default-int c:\matlabr2011b_x86\rtw\c\src\sfcn_bridge.h (37)

error C2143: syntax error : missing ';' before '*' c:\matlabr2011b_x86\simulink\include\simstruc.h (2135) error C4430: missing type specifier - int assumed. Note: C++ does not support default-int c:\matlabr2011b_x86\simulink\include\simstruc.h (2135)

I have been able to compile programs that include simstruc.h before, but suddenly it's not working. Can anyone point me in the right direction?

[Fabian Jonsson]

Oh, and the code in the line in above example looks like this:

sfcn_bridge.h (37): SS_SimMode *simModePtr;

simstruc.h (2135): SparseHeader* slvrJacobianMatrix;