[Samba] how to restrict using special characters in file names

[updatemyself .]

hi ALL,

can anyone help me to restrict using special characters (including spaces)
for file nameingor directory nameing.. in a samba share..

is it possible to automatically convert file names without spacial
characters..
is any user try to create file using special characters (including spaces)

Thank you in advance,

Jerrynikky.