double displayMidpointSeconds = ovr_GetPredictedDisplayTime(session, frameIndex);
ovrTrackingState trackState = ovr_GetTrackingState(session, displayMidpointSeconds, ovrTrue);
ovrPosef         handPoses[2];
ovrInputState    inputState;

// Grab hand poses useful for rendering hand or controller representation
handPoses[ovrHand_Left]  = trackState.HandPoses[ovrHand_Left].ThePose;
handPoses[ovrHand_Right] = trackState.HandPoses[ovrHand_Right].ThePose;

if (OVR_SUCCESS(ovr_GetInputState(session, ovrControllerType_Touch, &inputState)))
{
    if (inputState.Buttons & ovrButton_A)
    {
        // Handle A button being pressed
    }
    if (inputState.HandTrigger[ovrHand_Left] > 0.5f)
    {
        // Handle hand grip...
    }
}

The ovrInputState struct includes the following fields:

Field	Type	Description
`TimeInSeconds`	`double`	System time when the controller state was last updated.
`ControllerType`	`unsigned int`	Described by `ovrControllerType`. Indicates which controller types are present; you can check the `ovrControllerType_LTouch` bit, for example, to verify that the left touch controller is connected. Options include: `ovrControllerType_None` (0x0000) `ovrControllerType_LTouch` (0x0001) `ovrControllerType_RTouch` (0x0002) `ovrControllerType_Touch` (0x0003) `ovrControllerType_Remote` (0x0004) `ovrControllerType_XBox` (0x0010)
`Buttons`	`unsigned int`	Button state described by `ovrButton`. A corresponding bit is set if the button is pressed.
`Touches`	`unsigned int`	Touch values for buttons and sensors as indexed by `ovrTouch`. A corresponding bit is set if users finger is touching the button or is in a gesture state detectable by the controller.
`IndexTrigger[2]`	`float`	Left and right finger trigger values (`ovrHand_Left` and `ovrHand_Right`), in the range 0.0 to 1.0f. A value of 1.0 means that the trigger is fully pressed.
`HandTrigger[2]`	`float`	Left and right grip button values (`ovrHand_Left` and `ovrHand_Right`), in the range 0.0 to 1.0f. Hand trigger is often used to grab items. A value of 1.0 means that the trigger is fully pressed.
`Thumbstick[2]`	`ovrVector2f`	Horizontal and vertical thumbstick axis values (`ovrHand_Left` and `ovrHand_Right`), in the range -1.0f to 1.0f. The API automatically applies the dead zone, so developers don’t need to handle it explicitly.
`IndexTriggerNoDeadzone[2]`	`float`	Left and right finger trigger values (`ovrHand_Left` and `ovrHand_Right`), in the range 0.0 to 1.0f, without a deadzone. A value of 1.0 means that the trigger is fully pressed.
`HandTriggerNoDeadzone[2]`	`float`	Left and right grip button values (`ovrHand_Left` and `ovrHand_Right`), in the range 0.0 to 1.0f, without a dead zone. The grip button, formerly known as the hand trigger, is often used to grab items. A value of 1.0 means that the button is fully pressed.
`ThumbstickNoDeadzone[2]`	`ovrVector2f`	Horizontal and vertical thumbstick axis values (`ovrHand_Left` and `ovrHand_Right`), in the range -1.0f to 1.0f, without a deadzone.
`IndexTriggerRaw[2]`	`float`	Raw left and right grip button values (`ovrHand_Left` and `ovrHand_Right`), in the range 0.0 to 1.0f, without a dead zone or filter. A value of 1.0 means that the trigger is fully pressed.
`HandTriggerRaw[2]`	`float`	Left and right grip button values (`ovrHand_Left` and `ovrHand_Right`), in the range 0.0 to 1.0f, without a dead zone or filter. The grip button, formerly known as the hand trigger, is often used to grab items. A value of 1.0 means that the button is fully pressed.
`ThumbstickRaw[2]`	`ovrVector2f`	Horizontal and vertical thumbstick axis values (`ovrHand_Left` and `ovrHand_Right`), in the range -1.0f to 1.0f, without a dead zone or filter.

The ovrInputState structure includes the current state of buttons, thumb sticks, triggers and touch sensors on the controller. You can check whether a button is pressed by checking against one of the button constants, as was done for ovrButton_A in the above example. The following is a list of binary buttons available on touch controllers:

Button Constant	Description
`ovrButton_A`	A button on the right Touch controller.
`ovrButton_B`	B button on the right Touch controller.
`ovrButton_RThumb`	Thumb stick button on the right Touch controller.
`ovrButton_X`	X button on the left Touch controller.
`ovrButton_Y`	Y button on the left Touch controller.
`ovrButton_LThumb`	Thumb stick button on the left Touch controller.
`ovrButton_Enter`	Enter button on the left Touch controller. This is equivalent to the Start button on the Xbox controller.