VB和VC 结构体Dll参数传递

#include "math.h" extern "C" _declspec(dllexport) int __stdcall max(int *a,int b) { int i, Amax; Amax = *(a+0); for(i=0;i<=b;i++) { if (*(a+i)>Amax) Amax = *(a+i); } return Amax; } extern "C" _declspec(dllexport) int __stdcall min(int *a,int b) { int i, Amin; Amin = *(a+0); for(i=0;i<=b;i++) { if (*(a+i)<Amin) Amin = *(a+i); } return Amin; } struct Point { double x; double y; double z; }; extern "C" _declspec(dllexport) double __stdcall GetLength(Point *A, Point *B) { double nXlen = A->x - B->x; double nYlen = A->y - B->y; double nZlen = A->z - B->z; double nLength =sqrt(pow(nXlen,2) + pow(nYlen, 2) + pow(nZlen, 2)); return nLength; }