use System
use System.Reflection
use System.Runtime.InteropServices
 
class Program
    def main is shared
        objType = Type.getTypeFromProgID("Shell.Application") 
        shell = Activator.createInstance(objType)
        param = @[ 0, "Hello, COM(Cobra) World!", 0, 36 ]
        folder = shell.getType.invokeMember( 
            "BrowseForFolder", BindingFlags.InvokeMethod, nil, shell, param )
        if folder  nil
            Marshal.releaseComObject(folder)
        Marshal.releaseComObject(shell)