/*Functions in vb.net return a value to a variable. There is no return field on the declaration line and it's used as a sub in the following code. I'm not sure what i'm supposed to do with this part of the code.
This members must be defined by you:
static void funcvecjac(ref double[] x,
ref double[] fvec,
ref double[,] fjac,
ref int iflag)
*/
TIA