PaertsNowadays, a lot of customers are using remote sessions and would like to use their locally installed client applications within a remote session. RES Software developed RES VDX to give users the possibility of using locally installed applications within their remote desktops. This technology is called “reverse seamless.”

To accomplish this, RES VDX uses a technique called “clipping mode” which decides how local client applications will be merged into a full desktop session. In RES VDX 2011, we used clipping mode “b.” In RES VDX 2014 we use clipping mode “a” – and you have the flexibility to switch between these two clipping modes.

  • If you are running RES VDX 2014 as a standalone product, you can switch between these clipping modes by opening the configuration.xml within the RES VDX Editor that comes with the RES VDX Adminpack.
  • If you use RES Workspace Manager 2014 SR2 to configure RES VDX, you can switch between these clipping modes by opening Setup -> RES Software -> RES VDX -> Mode.

Let me explain what the clipping modes mean and what the main differences are between these two variants.

Clipping Mode “b”

Clipping mode “b” is the old method used in RES VDX 2011 and earlier (figure 1). In this method, we tweak the so called “client windows settings” like Z-order (figure 2) and region (figure 3). Once we know the Z-order and the region, we cut out the “client window” and paste it on top of the session (top most).

Figure 1 (Clipping mode “b”):

figure 1 clipping mode b

 

Figures 2 and 3:

figure 2 and figure 3

Drawbacks of setting the “Top most” flag:

  • Some applications restore the “Top most” flag set by RES VDX
  • Some applications behave unpredictably when set to “Top most”
  • Client applications that are already “Top most” cannot be managed by RES VDX.
  • Elevated applications cannot be managed by RES VDX

Drawbacks of setting “Regions”:

  • Getting the visible Regions requires DWM (Desktop Window Manager) to be turned off, since Windows 8 and Windows Server 2012 DWM cannot be switched off anymore
  • Some applications apply their original Region and thus overwrite the Region set by RES VDX
  • Some applications behave unpredictable when a Region is applied.
  • Elevated applications cannot be managed by RES VDX

Clipping Mode “a”

Clipping mode “a” is the “new method” used in RES VDX 2014 (Figure 4). In this method, we tweak the Session Window instead of the Client Window. Basically, we “cut” a hole in the session based on the Region of the Client Window and display the application through this hole.

Figure 4 (Clipping mode “a”):

figure 4 clipping mode a

In comparison to RES VDX 2011:

  • We don’t tweak Client Windows and set Regions and “Top most” flags anymore
  • We tweak the Session Window instead so the RES VDX plugin runs in the Session client context
  • “Elevated” applications can now be managed.
  • “Top most” applications can now be managed.

Why Upgrade to RES VDX 2014?

In addition to clipping mode options, the latest release of RES VDX offers the following support enhancements:

  • Support for Windows 8 and higher and Windows Server 2012 and higher
  • Support for client side “Top most” applications
  • Better support for applications like AutoCAD, ChipSoft, Voyager and many other difficult to virtualize applications

To read more about RES VDX 2014, check out the blog, I Can Finally Get More…More Local App Support for the Virtual Desktop! Or you can read the release notes at support.ressoftware.com.продвижение