L_WiaIsAvailable

static L_INT CALLBACK WiaAcquireCB(HWIASESSION hSession, 
                                   pBITMAPHANDLE pBitmap, 
                                   L_TCHAR * pszFilename, 
                                   L_UINT32 uPercent, 
                                   L_UINT32 uFlags, 
                                   L_VOID * pUserData) 
{ 
   UNREFERENCED_PARAMETER(hSession); 
   UNREFERENCED_PARAMETER(pBitmap); 
   UNREFERENCED_PARAMETER(pszFilename); 
   UNREFERENCED_PARAMETER(uPercent); 
   UNREFERENCED_PARAMETER(uFlags); 
   UNREFERENCED_PARAMETER(pUserData); 
 
   // You can do here any processing to the bitmap. 
 
   return WIA_SUCCESS; 
} 
 
L_INT WiaIsAvailableExample(HWND hWnd, L_UINT uWiaVersion) 
{ 
   L_BOOL bAvailable; 
   L_INT nRet; 
   HWIASESSION hSession = NULL; 
   LWIAACQUIREOPTIONS AcquireOpts; 
 
   /* Check to see if user passed WIA version is installed */ 
   bAvailable = L_WiaIsAvailable(uWiaVersion); 
   if (bAvailable) 
   { 
      nRet = L_WiaInitSession(uWiaVersion, &hSession); 
      if (nRet != SUCCESS) 
         return nRet; 
 
      nRet = L_WiaSelectDeviceDlg(hSession, hWnd, WiaDeviceTypeDefault, L_WIA_SELECT_DEVICE_NODEFAULT); 
      if (nRet != SUCCESS) 
      { 
         L_WiaEndSession(hSession); 
         return nRet; 
      } 
 
      /* Initialize and fill the required fields from the LWIAACQUIREOPTIONS structure */ 
      memset(&AcquireOpts, 0, sizeof(LWIAACQUIREOPTIONS)); 
      AcquireOpts.uStructSize = sizeof(LWIAACQUIREOPTIONS); 
      AcquireOpts.uMemBufSize = 64 * 1024; 
      AcquireOpts.bDoubleBuffer = TRUE; 
 
      nRet = L_WiaAcquire(hSession,  
                          hWnd,  
                          L_WIA_SHOW_USER_INTERFACE|L_WIA_DEVICE_DIALOG_USE_COMMON_UI,  
                          NULL,  
                          &AcquireOpts,  
                          NULL,  
                          NULL,  
                          WiaAcquireCB,  
                          NULL); 
      if (nRet != SUCCESS) 
      { 
         L_WiaEndSession(hSession); 
         return nRet; 
      } 
 
      nRet = L_WiaEndSession(hSession); 
      if (nRet != SUCCESS) 
         return nRet; 
   } 
 
   return SUCCESS; 
}