Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 1234567]

▼Ncom
▼Nfoxit
▼Nsdk	Foxit Conversion sdk namespace
►Naddon
►Naccessibility
CTaggedPDF
CTaggedPDFCallback
►Ncomparison
CCompareResultInfo
CCompareResultInfoArray
CCompareResults
CComparison
►Ncompliance
CComplianceEngine
CFixupData
CHitData
CPDFACompliance
CPDFCompliance
CPDFECompliance
CPDFXCompliance
CPreflight
CPreflightReportSettingData
CPreflightSettingData
CProgressCallback
CResultInformation
►Nconversion
►Noffice2pdf
CExcel2PDFConfig
COffice2PDF
COffice2PDFSettingData
CWord2PDFConfig
►Npdf2office
CConvertCallback
CConvertCheckCallback
CPDF2ExcelSettingData
CPDF2Office
CPDF2OfficeSettingData
CPDF2PowerPointSettingData
CPDF2WordSettingData
CConvert
CDWG2PDFProgressCallback	A callback class used for converting DWG to PDF
CDWG2PDFSettingData
CExcel2PDFSettingData
CHTML2PDFRelatedResource
CHTML2PDFRelatedResourceArray
CHTML2PDFSettingData
COFDConvertParam
CPowerPoint2PDFSettingData
CTXT2PDFSettingData
CWord2PDFSettingData
►Nlayoutrecognition
CLRContentElement
CLRContext
CLRElement
CLRGraphicsObjectElement
CLRStructureElement
►Nocr
COCR
COCRCallback
COCRConfig
COCREngine
COCRProgressCallback
COCRSettingData
COCRSettingDataArray
COCRSuspectInfo
COCRSuspectInfoArray
►Nofd
COFDDoc
COFDPage
COFDRenderer
►Noptimization
CAuditSpaceSize	Structure of audit space, the unit is byte type
CImageCompressionCallback
CImageSettings
CMonoImageSettings
COptimizer
COptimizerSettings
COptimizeScannedPDFSettings
CUnembeddedFontSettings
►Npageeditor
CFindOption
CJoinSplit
CParagraphEditing
CParagraphEditingMgr
CParagraphEditingProviderCallback
CParagraphEditingUndoItem
CReplaceCallback
CTextSearchReplace
►Npdf3d
CModelNode
CPDF3DAdvancedSetting
CPDF3DAnnot	This class represents PDF 3D annotation
CPDF3DAnnotInstance
CPDF3DAnnotInstanceArray	This class represents an array of PDF3DAnnotInstance
CPDF3DAnnotViewData	This class represents the data of a 3D annotation view
CPDF3DAnnotViewDataArray	This class represents an array of PDF3DAnnotViewData
CPDF3DContext
CPDF3DLaunchSetting
►Ntablegenerator
CTableBorderInfo
CTableCellData
CTableCellDataArray
CTableCellDataColArray	This class represents an array of TableCellData objects,inserted in the order of the displayed table from left to right
CTableCellIndexArray	An array of table cell index
CTableData
CTableGenerator
CTableGeneratorCallback
►Nxfa
CAppProviderCallback
CDocProviderCallback
CWidgetChoiceOption
CWidgetChoiceOptionArray
CWidgetMenu
CXFADoc
CXFAPage
CXFAWidget
CXFAWidgetModifyInfo
CApplyRedactionCallback
CFormCombination
CFormFileInfo
CFormFileInfoArray
CRedaction
►Ncommon	Common namespace
►Nfile
CAsyncReaderCallback
►Nfxcrt
CBasicArray
CFileReaderCallback	File reading interface
CFileWriterCallback	File writing interface
CFloatArray	An array of float values
CInt32Array	An array of signed integer values
CMatrix2D
CPauseCallback
CPoint	Type definition for point class for integer
CPointF	Type definition for point class for float
CPointFArray	An array of PointF objects
CRectF
CRectFArray	An array of RectF objects
CRectI
CStreamCallback	File stream interface, reading & writing
CUInt32Array	An array of unsigned integer values
CBarcode
CBase
CBitmap
CCodec
CColor
CColorSpace
CConstants	Global Constants
CDateTime
CDocEventCallback
CFont
CFontMapperCallback
CFontMapResult
CGraphState
CImage
CLibrary
CNotifierCallback
CPath
CPathArray
CPrintDeviceSettingData
CProgressive
CRange
CRenderConfig
CRenderer
CWStringArray
►Nfdf
CFDFDoc
►Nfts
CDocumentsSource
CFullTextSearch
CSearchCallback
►Npdf
►Nactions
CAction
CAdditionalAction
CDestination
CEmbeddedGotoAction
CEmbeddedGotoTarget
CGotoAction
CHideAction
CImportDataAction
CJavaScriptAction
CLaunchAction
CNamedAction
CRemoteGotoAction
CRenditionAction
CResetFormAction
CSetOCGStateAction
CSubmitFormAction
CURIAction
►Nannots
CAnnot
CAnnotArray
CBorderInfo
CCaret
CCircle
CDefaultAppearance
CFileAttachment
CFreeText
CHighlight
CIconFit
CIconProviderCallback
CInk
CLine
CLink
CMarkup
CMarkupArray
CNote
CNoteArray
CPagingSeal
CPolygon
CPolyLine
CPopup
CPSInk
CQuadPoints
CQuadPointsArray
CRedact
CRichTextStyle
CScreen
CShadingColor
CSound
CSquare
CSquiggly
CStamp
CStrikeOut
CTextMarkup
CUnderline
CWidget
►Ngraphics
CColorState
CFormXObject
CGraphicsObject
CGraphicsObjectArray
CImageObject
CMarkedContent
CPathObject
CShadingObject
CTextObject
CTextObjectArray
CTextState
►Ninterform
CChoiceOption
CChoiceOptionArray
CControl
CField
CFieldArray
CFiller
CFillerAssistCallback
CForm
CTimerCallback
►Nobjects
CPDFArray
CPDFDictionary
CPDFDictionaryArray
CPDFNameTree
CPDFNumberTree
CPDFObject
CPDFStream
CPDFStructTree
CStructElement
CStructMarkedContent
CStructObjectContent
CStructTreeEntity
CAnnotationSummary
CAnnotationSummaryCallback
CAnnotationSummarySettings
CAssociatedFiles
CAttachments
CBookmark
CCertChainResolverCallback
CCertificateEncryptData
CCertificateSecurityCallback
CCertificateSecurityHandler
CCertIssuerPair
CCertVerifyResult
CCertVerifyResultArray
CCombination
CCombineDocumentInfo
CCombineDocumentInfoArray
CCustomEncryptData
CCustomSecurityCallback
CCustomSecurityHandler
CDocViewerPrefs
CDRMEncryptData
CDRMSecurityCallback
CDRMSecurityHandler
CEmbeddedFontData
CFileSpec
CFillSign
CFillSignObject
CGraphicsObjects
CHeaderFooter
CHeaderFooterContent
CHeaderFooterContentGenerator
CHiddenInfoSettingData	Configuration settings for removing hidden or sensitive data from a PDF document
CLayerContext
CLayerNode
CLayerNodeArray
CLayerPrintData
CLayerTree
CLayerZoomData
CLTVVerifier
CMediaPlayer
CMetadata
COutputPreview
CPageBasicInfo
CPageBasicInfoArray
CPageLabels
CPageNumberRange
CPageTextLinks
CPagingSealConfig
CPagingSealSignature
CPayLoadData
CPDFDoc
CPDFPage
CPortfolio
CPortfolioFileNode
CPortfolioFolderNode
CPortfolioNode
CPortfolioNodeArray
CPSI
CPSICallback
CReadingBookmark
CReflowPage
CRendition
CResponse
CRevocationArrayInfo
CRevocationCallback
CRMSEncryptData
CRMSSecurityCallback
CRMSSecurityHandler
CSchemaField
CSchemaFieldArray
CSearchCancelCallback
CSecurityCallback
CSecurityHandler
CSignature
CSignatureArray
CSignatureCallback
CSignatureFillSignObject
CSignatureVerifyResult
CSignatureVerifyResultArray
CSnappedPoint
CSnapPointMgr
CSplitDocumentInfo
CSplitDocumentInfoArray
CSplitFileResult
CSplitFileResultArray
CSplitOutputSettingData
CSplitPDFDoc
CSplitPDFDocCallback
CStdEncryptData
CStdSecurityHandler
CTableOfContentsConfig
CTabOrderMgr
CTextFillSignObject
CTextFillSignObjectData
CTextFillSignObjectDataArray
CTextLink
CTextPage
CTextPageCharInfo
CTextSearch
CTiledWatermarkSettings
CTimeRange
CTimeStampCallback
CTimeStampServer
CTimeStampServerMgr
CTrustedCertStoreCallback
CWatermark
CWatermarkSettings
CWatermarkTextProperties
CWrapperData
CActionCallback
CButtonItem
CDialogDescriptionConfig
CDialogDescriptionElement
CDialogDescriptionElementArray
CFloatingInfo
CIdentityProperties
CJavascriptModifyItemInfo
CMediaPlayerCallback
CMediaSettings
CMenuItemConfig
CMenuItemEx
CMenuList
CMenuListArray
CPDFException
CPDFUtil
CPlayerArgs
CPrintParams
CSearchIndexConfig
CSearchOption
CSOAPAuthenticateInfo
CSOAPRequestProperties
CSOAPResponseInfo