David,

Just leave Parameter Types and Function Parameters emtpy

For example (in this case, call to a Windows API):

Call DLL "kernel32.dll" -- Function "GetUserDefaultLCID" () ()

The %_SB_RETURN% variable holds the return value.

BTW, there are interesting example scripts in the Examples package.

http://www.lindersoft.com/sb6_Examples.exe

We'll make new SetupBuilder 6.5 examples available next week.

Does this help?

Friedrich