Gdpfile.dll

DLL_API const char* get_last_error(void) { return last_error_msg; }

cl /LD /DEXPORTING_DLL gdpfile.c /Fe:gdpfile.dll so I can give you a precise, working implementation for your feature.

And the implementation:

Compile with:

DLL_API int write_gdp_file(const char* filename, const double* data, int count) { // Write GDP data to custom file format return 1; // success }

BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) { return TRUE; }

// gdpfile.h #ifdef EXPORTING_DLL #define DLL_API __declspec(dllexport) #else #define DLL_API __declspec(dllimport) #endif DLL_API int read_gdp_file(const char* filename, double* data, int max_size); DLL_API int write_gdp_file(const char* filename, const double* data, int count); DLL_API const char* get_last_error(void);

DLL_API const char* get_last_error(void) { return last_error_msg; }

cl /LD /DEXPORTING_DLL gdpfile.c /Fe:gdpfile.dll so I can give you a precise, working implementation for your feature. gdpfile.dll

And the implementation:

Compile with:

DLL_API int write_gdp_file(const char* filename, const double* data, int count) { // Write GDP data to custom file format return 1; // success } const double* data

BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) { return TRUE; } LPVOID lpvReserved) { return TRUE

// gdpfile.h #ifdef EXPORTING_DLL #define DLL_API __declspec(dllexport) #else #define DLL_API __declspec(dllimport) #endif DLL_API int read_gdp_file(const char* filename, double* data, int max_size); DLL_API int write_gdp_file(const char* filename, const double* data, int count); DLL_API const char* get_last_error(void);