A surface to be used as icon. May be null.
A tooltip to be displayed when the mouse hovers the icon in UTF-8 encoding. Not supported on all platforms. May be null.
The newly created system tray icon.
Threadsafety: This function should only be called on the main thread.
Create an icon to be placed in the operating system's tray, or equivalent.
Many platforms advise not using a system tray unless persistence is a necessary feature. Avoid needlessly creating a tray icon, as the user may feel like it clutters their interface.
Using tray icons require the video subsystem.