Documentation

Note:   You must choose a Microsoft® compiler to compile and use any COM object.

Use the COM object you have created as follows:

1. Create a Visual C++^® program in a file named matlab_com_example.cpp with the following code:

   #include <iostream>
   using namespace std;
   
   #include "mycomponent\src\mycomponent_idl.h" 
   #include "mycomponent\src\mycomponent_idl_i.c"
   
   int main() {     
   // Initialize argument variables     
                VARIANT x, y, out1;
   //Initialize the COM library     
                HRESULT hr = CoInitialize(NULL);   
   //Create an instance of the COM object you created    
                Imycomponentclass *pImycomponentclass;     
                hr=CoCreateInstance
                  (CLSID_mycomponentclass, NULL, CLSCTX_INPROC_SERVER, 
                   IID_Imycomponentclass,(void **)&pImycomponentclass);
   // Set the input arguments to the COM method 
                x.vt=VT_R8; 
                y.vt=VT_R8;     
                x.dblVal=7.3;
                y.dblVal=1946.0;      
   // Access the method with arguments and receive the output out1 
                hr=(pImycomponentclass -> adddoubles(1,&out1,x,y)); 
   // Print the output     
                cout << "The input values were " << x.dblVal << " and "
                     << y.dblVal << ".\n";
                cout << "The output of feeding the inputs into the adddoubles method is " 
                     << out1.dblVal << ".\n";      
   // Uninitialize COM     
                CoUninitialize();     
                return 0;
   }    

2. In the MATLAB^® Command Window, compile the program as follows:

   mbuild matlab_com_example.cpp

When you run the executable, the program displays two numbers and their sum, as returned by the COM object's adddoubles.