software ：lanstar VC3.1
It send the server screen to a lot of client terminal(example 100client)
When slideshow AT full screen,client terminal display black screen
When sildeshow AT window,client terminal display edit status
But When At edit status,client terminal can receive the server screen.
I try other software.
example camstudio.It is record a video of screen.
It is work good.Not This problem.
Operating System: Windows XP
Version: 188.8.131.52 rc
It is related to LibreOffice ?
The reason is found!
software lanstar version too old!
I use 'lanstar V8.1' to test,No this problem!