I am working on a project which requires VNC Server to be run on my system (Mac OS X v10.8).
VNS server is installed in my Mac system, now I need to run VNC server, but for running the server sufficient privileges needs to be provided programmatically or using Apple Script(System Preference -> Sharing -> Remote Management -> Enable the check box).
How could I enable remote management through objective c program or apple script ? or is there any API provided by Apple to manage sharing options?
You can enable and configure the remote management service with the kickstart command. It's not in the usual PATH, so you need to specify its full path:
/System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart
Its option format is a little cryptic, but with some experimentation you should be able to get the effect you want (see Apple's KB #HT2370 and SS64.com's "man page").
Also, it must run as root, so from AppleScript, use do shell script with administrator privileges. I think you'll need something close to this:
do shell script "/System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -activate -configure -access -on -restart -agent -privs -all" with administrator privileges