L_VecAttachToWindow

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
/* This is the window procedure of the attached window. */ 
LRESULT WINAPI WndProc(HWND   hwnd, 
UINT   message, 
WPARAM wParam, 
LPARAM lParam) 
{ 
   VECTORHANDLE   Vector;  /* Vector handle. */ 
   L_INT          nRet;    /* return value. */ 
   PAINTSTRUCT    PaintStruct; 
   HDC            hdc; 
   RECT           rect; 
   switch(message) 
   { 
      case WM_CREATE: 
      /* Load an image into the vector handle. */ 
      nRet = L_VecLoadFile( MAKE_IMAGE_PATH(TEXT("random.dxf")), &Vector, NULL, NULL ); 
      if( nRet != SUCCESS ) 
      { 
         MessageBox(hwnd, TEXT("Error loading the file."), TEXT("Error"), MB_OK); 
         return -1; 
      } 
      /* Attach the vector image with this window using the GDI engine and double buffering. */ 
      nRet = L_VecAttachToWindow( hwnd, &Vector, VECTOR_ENGINE_DOUBLEBUFFER ); 
      if( nRet != SUCCESS ) 
      { 
         MessageBox(hwnd, TEXT("Error assigning vector image to window."), TEXT("Error"), MB_OK); 
         L_VecFree( &Vector ); 
         return -1; 
      } 
      return 0; 
      case WM_SIZE: 
      /* Set new view port */ 
      GetClientRect( hwnd, &rect ); 
      L_VecSetViewport( &Vector, &rect ); 
      return 0; 
      case WM_PAINT: 
      hdc = BeginPaint(hwnd, &PaintStruct); 
      /* Paint the vector image */ 
      L_VecPaint( hdc, &Vector, TRUE ); 
      EndPaint(hwnd, &PaintStruct); 
      return 0; 
      case WM_DESTROY: 
      /* Free the vector */ 
      L_VecFree( &Vector ); 
      PostQuitMessage( 0 ); 
      return 0; 
default: 
      return DefWindowProc( hwnd, message, wParam, lParam ); 
   } 
}