Notify the host that a control has been grabbed or released.
The host should cease automating the port or otherwise manipulating the
port value until the control has been ungrabbed.
@param handle The handle field of this struct.
@param port_index The index of the port associated with the control.
@param grabbed If true, the control has been grabbed, otherwise the
control has been released.
Notify the host that a control has been grabbed or released.
The host should cease automating the port or otherwise manipulating the port value until the control has been ungrabbed.
@param handle The handle field of this struct. @param port_index The index of the port associated with the control. @param grabbed If true, the control has been grabbed, otherwise the control has been released.