Gdpfile.dll

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

// gdpfile.c #include <windows.h> #include <stdio.h> #include "gdpfile.h" static char last_error_msg[256]; gdpfile.dll

DLL_API int read_gdp_file(const char* filename, double* data, int max_size) { // Your GDP file reading logic here return 0; // return number of values read } cl /LD /DEXPORTING_DLL gdpfile