[Lazarus] Remote application

Lukasz Sokol el.es.cr at gmail.com
Wed Oct 31 13:47:34 CET 2012

On 31/10/2012 09:13, Michael Schnell wrote:
> I understand that there are (at least) two ways to do the remote
> display.
> A) Read the pixels from the graphics driver. This is what VNC does.
> The problem here is, that you don't know when an update is necessary
> (and thus you need to do polling) and that reading the pixels needs a
> lot of performances (get a GDI-handle, read the complete screen
> memory via the bus and then transfer only the pixels that have
> changed). 

Some /free software/ VNC implementations (e.g. UltraVNC) install their 
own display driver [under Windows] to exactly know /when/ update is needed
and where. 

> -Michael


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