| HasFont | Graphics.UI.GIO, Graphics.UI.GIO.Attributes |
| HasIcon | Graphics.UI.GIO, Graphics.UI.GIO.Attributes |
| hProgressBar | Graphics.UI.GIO, Graphics.UI.GIO.Controls |
| halt | Graphics.UI.GIO, Graphics.UI.GIO.Process |
| hatch | Graphics.UI.GIO, Graphics.UI.GIO.Attributes |
| hcenter | Graphics.UI.GIO, Graphics.UI.GIO.Layout |
| height | Graphics.UI.GIO, Graphics.UI.GIO.Attributes |
| helpKey | Graphics.UI.GIO, Graphics.UI.GIO.Events |
| hfill | Graphics.UI.GIO, Graphics.UI.GIO.Layout |
| hfix | Graphics.UI.GIO, Graphics.UI.GIO.Layout |
| hglue | Graphics.UI.GIO, Graphics.UI.GIO.Layout |
| hideWindow | Graphics.UI.GIO, Graphics.UI.GIO.Window |
| hmenu | Graphics.UI.GIO, Graphics.UI.GIO.Menu |
| homeKey | Graphics.UI.GIO, Graphics.UI.GIO.Events |
| horizontal | Graphics.UI.GIO, Graphics.UI.GIO.Layout |
| hpad | Graphics.UI.GIO, Graphics.UI.GIO.Layout |
| hrigid | Graphics.UI.GIO, Graphics.UI.GIO.Layout |
| hrod | Graphics.UI.GIO, Graphics.UI.GIO.Layout |
| hslider | Graphics.UI.GIO, Graphics.UI.GIO.Controls |
| hstretch | Graphics.UI.GIO, Graphics.UI.GIO.Layout |
| hvpad | Graphics.UI.GIO, Graphics.UI.GIO.Layout |
| hwindow | Graphics.UI.GIO, Graphics.UI.GIO.Layout |