Help for Small Scrolling project

Dear All ,
Firstly I am very greatfull to you all to provide such kind help for Library that is very easy to use. But
I Need your help in regards of developing small program that would be able to run on any Xdisplay programe,For example if any mplayer movie is running ,hen this program will run on bottom of the screen showing some scrolling messages,programe i can develop no problem but i just want to know how can i run my programe on any existing running X display .
Please Help me,You solved a lot of problem,I am having a very deep and +ve hope from your side.
And Thanks
Sharad Bajaj

Sharad Bajaj
Software Design Engineer
WOW Vision Pte Ltd. Singapore
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