#include <cv.h>
    #include <highgui.h>
    #include <videoInput.h>

    void main(void)
    {
        //create a videoInput object
      videoInput VI;
      
      //Prints out a list of available devices and returns num of devices found
      int numDevices = VI.listDevices();  
      
      int device1 = 0;  //this could be any deviceID that shows up in listDevices
      int device2 = 1;  //this could be any deviceID that shows up in listDevices
      int device3 = 2;  //this could be any deviceID that shows up in listDevices
      
      //setup the first device - there are a number of options:
      
      VI.setupDevice(device1,640,480);               //setup the first device with the default settings
      //VI.setupDevice(device1, VI_COMPOSITE);         //or setup device with specific connection type
      //VI.setupDevice(device1, 320, 240);          //or setup device with specified video size
      //VI.setupDevice(device1, 320, 240, VI_COMPOSITE);  //or setup device with video size and connection type

      //VI.setFormat(device1, VI_NTSC_M);          //if your card doesn't remember what format it should be
                                //call this with the appropriate format listed above
                                //NOTE: must be called after setupDevice!
      
      //optionally setup a second (or third, fourth ...) device - same options as above
      VI.setupDevice(device2);
      VI.setupDevice(device3);

      //As requested width and height can not always be accomodated
      //make sure to check the size once the device is setup


      IplImage *src1 = cvCreateImage(cvSize(VI.getWidth(device1),VI.getHeight(device1)),IPL_DEPTH_8U,3);
      IplImage *src2 = cvCreateImage(cvSize(VI.getWidth(device2),VI.getHeight(device2)),IPL_DEPTH_8U,3);
      IplImage *src3 = cvCreateImage(cvSize(VI.getWidth(device3),VI.getHeight(device3)),IPL_DEPTH_8U,3);

      
      char * yourBuffer1 = src1->imageData;
      char * yourBuffer2 = src2->imageData;
      char * yourBuffer3 = src3->imageData;
      //same applies to device2 etc
      
      //to get a settings dialog for the device
    //  VI.showSettingsWindow(device1);
    //  VI.showSettingsWindow(device2);

      
      //to get the data from the device first check if the data is new
      if(VI.isFrameNew(device1)){
        VI.getPixels(device1, (unsigned char*)yourBuffer1, false, true);
      }
      if(VI.isFrameNew(device2)){
        VI.getPixels(device2, (unsigned char*)yourBuffer2, false, true);
      }
      if(VI.isFrameNew(device3)){
        VI.getPixels(device3, (unsigned char*)yourBuffer3, false, true);
      }
      

      cvNamedWindow("device1",1);
      cvNamedWindow("device2",1);
      cvNamedWindow("device3",1);
      cvShowImage("device1",src1);
      cvShowImage("device2",src2);
      cvShowImage("device3",src3);
      while(cvWaitKey(10)!=27){
        if(VI.isFrameNew(device1)){
          VI.getPixels(device1, (unsigned char*)yourBuffer1, false, true);
        }
        if(VI.isFrameNew(device2)){
          VI.getPixels(device2, (unsigned char*)yourBuffer2, false, true);
        }
        if(VI.isFrameNew(device3)){
          VI.getPixels(device3, (unsigned char*)yourBuffer3, false, true);
        }

        cvShowImage("device1",src1);
        cvShowImage("device2",src2);
        cvShowImage("device3",src3);
      }
      
      //Shut down devices properly
      VI.stopDevice(device1);
      VI.stopDevice(device2);
      VI.stopDevice(device3);

    }