RE: Thumbnail mode using ActiveX control

TShriver — Fri, 29 Aug 2008 10:54:24 GMT

Can ayone convert this C# code to VB6?

using (Bitmap bmp = Bitmap.FromHbitmap(new IntPtr(vncCtrl.ScreenBitmap)))

Thank you!

Tim

RE: Thumbnail mode using ActiveX control

Support (s-code) — Thu, 20 Dec 2007 09:36:09 GMT

It's possible, in fact the VNC Manager uses ViewerX for the thumbnail view implementation.

There are several ways how it could be implemented. But just to give you a rough idea about our implementation.
We use native Windows listview control to show the thumbnail items. To each listview item corresponds a hidden instance of ViewerX control.
For this case, when ViewerX is hidden you would want to initialize the following properties:

//since you just want to show a remote screen
vncCtrl.ViewOnly = true;

//no need to transfer clipboard either
vncCtrl.DisableClipboard = true;

//tells ViewerX not to paint the remote screen (ViewerX is hidden, so there is no need to paint it)
vncCtrl.ThumbnailMode = true;

//allows ScreenUpdatedEvent to be fired for each screen update. By default this event is disabled for performance reasons
vncCtrl.AdvancedSettings.EnableScreenUpdatedEvent = true;

So we subscribe to ScreenUpdatedEvent and update an ImageList associated with thumbnails listview control for each screen update. Although in reality it's a bit more complicated than that.

Last but not least, here is how you could get access to the screen bitmap (C# code):
using (Bitmap bmp = Bitmap.FromHbitmap(new IntPtr(vncCtrl.ScreenBitmap)))
{
//do something with bmp
}

I hope this helps.

Thumbnail mode using ActiveX control

Carl916 — Thu, 20 Dec 2007 08:41:09 GMT

Is it possible to replicate the VNC manager thumbnail feature using the activeX control?

Regards, Carl Gilbert

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RE: Thumbnail mode using ActiveX control

RE: Thumbnail mode using ActiveX control

Thumbnail mode using ActiveX control