All right, it worked, when the D side is this: module techborg; import std.c.stdio;
extern(C): shared int ResultD; int Process(int Value) { printf("You have sent the value: %d\n", Value); ResultD = (Value % 5); return ResultD; } However, if I wanted to use printf() from std.stdio, dmc can't link the library any more and complains about undefined symbols: techborg.lib Warning 140: Library probably needs FIXLIB techborg.lib(techborg) Error 42: Symbol Undefined _D3std5stdio12__ModuleInfoZ Also, what was that solution you found for converting OMF->COFF? I can't seem to find the post you mentioned.