OSStatus FSMountServerVolumeSync (
  CFURLRef url,
  CFURLRef mountDir,
  CFStringRef user,
  CFStringRef password,
  FSVolumeRefNum *mountedVolumeRefNum,
  OptionBits flags
);

NSString* cmd = @"choose URL";

NSString* cmd = @"tell application "Finder" to activatendelay 0.2ntell application "System Events" to keystroke "k" using command down";

NSAppleScript* theScript = [[NSAppleScript alloc] initWithSource:cmd];
[theScript executeAndReturnError:nil];
[theScript release];