| 0x0 || 0x4 || Size of this ControllerSupportArgPrivate struct.
| 0x0 || 0x4 || Size of this ControllerSupportArgPrivate struct.
|-
|-
−
| 0x4 || 0x4 || Size of the storage following this one ([[#ControllerSupportArg]] or [[#ControllerFirmwareUpdateArg]]). With ShowControllerKeyRemappingForSystem, this is the size of [[#ControllerSupportArg]] even though the actual storage is [[#ControllerKeyRemappingArg]].
+
| 0x4 || 0x4 || Size of [[#ControllerSupportArg]].