UltraLite User's Guide
  Developing Applications for Windows CE
    Synchronization on Windows CE
      Adding ActiveSync synchronization to your application

Adding ActiveSync synchronization (Windows API)

If you are programming directly to the Windows API, you must handle the message from the MobiLink provider in your application's WindowProc function, using the ULIsSynchronizeMessage function to determine if it has received the message.

Here is an example of how to handle the message:

LRESULT CALLBACK WindowProc( HWND hwnd, 
         UINT uMsg, 
         WPARAM wParam, 
         LPARAM lParam )
{
  if( ULIsSynchronizeMessage( uMsg ) ) {
    DoSync();
    if( wParam == 1 ) DestroyWindow( hWnd );
    return 0;
  }

  switch( uMsg ) {

  // code to handle other windows messages

  default:
    return DefWindowProc( hwnd, uMsg, wParam, lParam );
  }
  return 0;
}

where DoSync is the function that actually calls ULSynchronize.

For more information, see ULIsSynchronizeMessage function.