Hongkong may not be the best location for Windows Forms job opportunities. At the current time, Jobspotting counts only 6. Maybe, you could try slightly farther afield. Looking at the most dominant subcategories, we find vacant positions in Banking and Electronic Trading Systems. To be in with the best odds of finding a job in this area, learn about areas of expertise like C#, .Net and Wpf.
People who are highly expert will find many interesting job opportunities at this time. It's common practice for most businesses in this area to hire through recruitment agencies. Job seeker preferences are paramount at Jobspotting. You can filter those out if you like. Why not have a look at vacant positions in another country to compare and contrast opportunities. Just use the Explore tab.