Here are the data structures with brief descriptions:

__DATAPACKET
__PaIOPacket
__PaProcessThreadInfo
__PaUsbTerminalGUIDToName
__PaWinWdmDeviceInfo
__PaWinWdmFilter
__PaWinWdmHostApiRepresentation
__PaWinWdmIOInfo
__PaWinWdmMuxedInput
__PaWinWdmPin
__PaWinWDMScanDeviceInfosResults
__PaWinWdmStream
_BYTE_BLOB
_SystemTimer
_tagpropertykey
_WAVEFORMATEXTENSIBLE_UNION
BiQuad
BiquadFilter_s
DSDeviceNameAndGUID
DSDeviceNameAndGUIDVector
DSDeviceNamesAndGUIDs
HwDevInfo
LoopbackContext_s
OceanWave
PaAlsaDeviceInfo
PaAlsaHostApiRepresentation
PaAlsaStream
PaAlsaStreamComponent
PaAlsaStreamInfo
PaAsiHpiDeviceInfo
PaAsiHpiHostApiRepresentation
PaAsiHpiStream
PaAsiHpiStreamComponent
PaAsiHpiStreamInfo
PaAsioDeviceInfo
PaAsioDriverInfo
PaAsioHostApiRepresentation
PaAsioStream
PaAsioStreamBlockingState
PaAsioStreamInfo
PaAudioIOComponent
PaAudioIOHostApiRepresentation
PaAudioIOStream
PaDeviceInfo
PaHostApiInfo
PaHostErrorInfo
PaJackHostApiRepresentation
PaJackStream
PaMacAUHAL
PaMacBlio
PaMacCoreDeviceProperties
PaMacCoreStream
PaMacCoreStreamInfo
PaMacXRunListNode_s
PaNameHashIndex
PaNameHashObject
PaOSSHostApiRepresentation
PaOssStream
PaOssStreamComponent
PaPulseAudio_HostApiRepresentation
PaPulseAudio_Stream
PaQaAnalysisResult_s
PaQaData
PaQaRecording_s
PaQaSineGenerator_s
PaQaTestParameters
PaQaTestTone_s
PaSineOscillator
PaSkeletonHostApiRepresentation
PaSkeletonStream
PaSndioHostApiRepresentation
PaSndioStream
PaStreamCallbackTimeInfo
PaStreamInfo
PaStreamParameters
patest1data
paTestData
PaUnixMutex
PaUnixThread
PaUtilAllocationGroup
PaUtilAllocationGroupLink
PaUtilBufferProcessor	The main buffer processor data structure
PaUtilChannelDescriptor	An auxiliary data structure used internally by the buffer processor to represent host input and output buffers
PaUtilConverterTable
PaUtilCpuLoadMeasurer
PaUtilHostApiRepresentation
PaUtilHostApiSpecificStreamInfoHeader
PaUtilPrivatePaFrontHostApiInfo
PaUtilRingBuffer
PaUtilStreamInterface
PaUtilStreamRepresentation
PaUtilThreading
PaUtilTriangularDitherGenerator	State needed to generate a dither signal
PaUtilZeroerTable
PaVersionInfo
PaWasapiAudioClientParams
PaWasapiDeviceInfo
PaWasapiHostApiRepresentation
PaWasapiHostProcessor
PaWasapiJackDescription
PaWasapiStream
PaWasapiStreamInfo
PaWasapiStreamPassthrough
PaWasapiSubStream
PaWDMKSDirectionSpecificStreamInfo
PaWDMKSSpecificStreamInfo
PaWinDirectSoundStreamInfo
PaWinDsDeviceInfo
PaWinDsDSoundEntryPoints
PaWinDsHostApiRepresentation
PaWinDsStream
PaWinMmeDeviceAndChannelCount
PaWinMmeDeviceInfo
PaWinMmeHostApiRepresentation
PaWinMmeSingleDirectionHandlesAndBuffers
PaWinMmeStream
PaWinMmeStreamInfo
PaWinUtilComInitializationResult	Data type used to hold the result of an attempt to initialize COM using PaWinUtil_CoInitialize. Must be retained between a call to PaWinUtil_CoInitialize and a matching call to PaWinUtil_CoUninitialize
PaWinWaveFormat
PaWinWDMKSAvRtEntryPoints
PaWinWDMKSDeviceInfo
PaWinWDMKSInfo
PinkNoise
ScopedPaHandler
Sine
TestData
TestParameters_s
ThreadIdleScheduler
ThreadSleepScheduler
UserOptions_s
WAV_Writer_s
WAVEFORMATEXTENSIBLE_IEC61937
WireConfig_s