its posisible on all platforms that can reach

windows api functions.

Thanks, but actually the question should be do you
have any idea how to do it. I tried before, but
somehow i cannot connect windows screensaver  app to my
app.

See this link:
java.sun.com/.../saverbeans.html

it is possible to do screen  saver programs in
TSR using C-lanugae . it is a system side programing and also lot of
share wares avialable to make screen savers.

Please, can anyone give me a script that creates a window (with script closing
the window as well)?
Then i need help with loading pictures, objects and character movement scripts.
Anyone help?

What is my aim? I plan to make a simple 2D Horror Survival game or 2D Thief game
(Thief-clone), help?
Advices, hints, scripts and tutorials are welcome, as well as suggestions and
links (to direct script)

in which language java or vb
if it is vb no probs. just create  an exe and rename it
as .scr file
if it is java create executable file and rename it as
.scr
.but one thing it will work only with windows 98

no of software  tools are there to convert .class file to .exe file convert it
first to .exe and then convert to .scr . i think this should work fine