VB connection with Matlab

 % I want to Use VB as a interface GUI to link with Matlab to solve   this function , could you tell me how 
 function [A] = Area(b,y,z)
 %|---------------------------------------------|
 %| Calculation of the area of a trapezoidal |
 % open-channel cross-section. 
 % 
  % Variables used: 
 % =============== 
 % b = bottom width (L) 
 % y = flow depth (L) 
 % z = side slope (zH:1V, dimensionless) 
 % A = area (L*L, optional in lhs) 
 % ---------------------------------------------
 A = (b+z*y)*y;