//In [Project Properties - Linker - Input - Additional Dependencies] 
//add Vfw32.lib
#include "Vfw.h"
 
HWND hCapture;
 
//skipped...
 
VOID DriverDisconnect()
{
    SendMessage(hCapture, 
        WM_CAP_DRIVER_DISCONNECT, NULL, NULL);
}
 
BOOL IsCaptureConnected()
{
    CAPDRIVERCAPS psCaps ;
    ZeroMemory(&psCaps, sizeof(psCaps));
 
    SendMessage(hCapture, WM_CAP_DRIVER_GET_CAPS, 
        (WPARAM) sizeof(CAPDRIVERCAPS), (LPARAM) &psCaps);
    return psCaps.fCaptureInitialized;
}
 
BOOL DriverConnect()
{
    SendMessage(hCapture, WM_CAP_DRIVER_CONNECT, NULL, NULL);
    return IsCaptureConnected();
}
 
VOID StartPreview()
{
    SendMessage(hCapture, WM_CAP_SET_PREVIEWRATE, 15,0);
    SendMessage(hCapture, WM_CAP_SET_PREVIEW, 1,0);
    SendMessage(hCapture, WM_CAP_SET_OVERLAY, 1,0);
}
 
VOID ReleaseCaptureWindow()
{
    if (hCapture != NULL)
    {
        DriverDisconnect();
        DestroyWindow(hCapture);
        hCapture=NULL;
    }
}
 
VOID ResizeCaptureWindow()
{
    BITMAPINFOHEADER bmpinfo;
    ZeroMemory(&bmpinfo, sizeof(bmpinfo));
    bmpinfo.biSize = sizeof(bmpinfo);
 
    SendMessage(hCapture, WM_CAP_GET_VIDEOFORMAT, 
        (WPARAM) sizeof(bmpinfo), (LPARAM) &bmpinfo);
 
    SetWindowPos(hCapture, 0,0,0, bmpinfo.biWidth, 
        bmpinfo.biHeight, SWP_SHOWWINDOW);
}
 
VOID InitCaptureWindow(HWND hWnd)
{
   hCapture = capCreateCaptureWindow(NULL, 
       WS_CHILD|WS_VISIBLE, 0,0,1,1, hWnd, 1);
 
   if (hCapture == NULL) return;
 
   if (DriverConnect())
   {
        SendMessage(hCapture, WM_CAP_SET_SCALE, 1,0);
        ResizeCaptureWindow();
        StartPreview();
   }
}