Global Data Structures

The Photon API defines various data types and structures:

If you're using the Photon Application Builder (PhAB), the appropriate header files are automatically included in your application.
If you're not using PhAB, include <Pt.h>.

This chapter describes the data structures listed below; other datatypes are described in the Photon Library Reference.

Structure	Function
`PtBalloonCallback_t`	Balloon callback structure
`PtCallback_t`	Regular callback structure
`PtCallbackInfo_t`	Specific callback information
`PtHotkeyCallback_t`	Hotkey handler structure
`PtRawCallback_t`	Event handler structure