Simple Windows Development Tools?

fwc asks: "Over the past few years, I've been fortunate to be able to avoid writing a Windows GUI application, however this good luck is coming to an end. In the next few weeks, I need to write a fairly simple application which will need to display data received from a serial port in a decoded (and graphical) form via a Windows GUI. Unfortunately, my skills in this area are out of date, since I haven't written any GUI apps for close to 10 years. Because this program needs to be fairly small and easy to install, the use of Perl/tk isn't a valid option. What options do I have to build a small application on Windows, without a large learning curve?"