Block end-users from messing up vnc server and client

Hi,

I have a project on which users should be able to take over a touchscreen app remotely with a tablet.

I've tested several vnc client programs on both an android-tablet and an ipad.

For the Anrdoid tablet pocketcloud seems to be the best software, it has an acceptable delay nice screen resolution etc...., however I have some issues...

The end-users should only be able to access the predefined vnc server, they should not be able to send windows keys and other keycombinations, only the left mouse button should be allowed...

I've seen that it is planned to disable the mousepointer in the future, in which timeframe can we expect this?

Is there a way to hide the settings from the end-user? or can we create some kind of short-cut on the desktop opening the connection directly? (I do block the operating system with surelock (another nice app))

I really like the automatic zoom after connecting to the server... is it possible to lock the zoom so the user would be able to use the remote scroll bars

Does anyone has experience with this?

Thanks!

PS on the ipad pocketcloud did not work on a local network without internet; it popups a message there is no network found... for this reason I had to choose another app for the ipad (hanna mobile's "connect my MAC") which is a pitty because i really liked pocketcloud on the android tablet