| Name | Description | Type | Package | Framework |
| WNDCLASSEX | Contains the window class attributes that are registered by the User32. | Class | org.lwjgl.system.windows | LWJGL |
| WNDCLASSEX .Buffer | An array of WNDCLASSEX structs. | Class | org.lwjgl.system.windows.WNDCLASSEX | LWJGL |