This outline summarizes the major new features and changes in the API available with Archicad 24 ().

1. New functionality
   • Analytical Model
2. Modified/new structures
   • API_IOParams ⇒ optional BIMcloud file location parameter added.
   • API_MarkUpType ⇒ style and floor linkage have been removed. Markups cannot be linked to a floor, and style is managed through the WorkEnvironment. Note, there is now only one style, applied to all markups.
   • API_Attribute ⇒ MarkupStyleType have been removed.
   • API_AttrTypeID ⇒ markupStyle have been removed and last index decremented by one.
   • API_RoomRelation 
   • Analytical Model
     • API_AnalyticalModelVariation ⇒ new structure describing a variation of the analytical model.
     • API_AnalyticalNode ⇒ new structure describing a node in the analytical model.
     • API_AnalyticalCoordSysDirection ⇒ new structure describing a coordinate system direction.
     • API_AnalyticalCrossSection ⇒ new structure describing a cross-section of an analytical member.
     • API_AnalyticalMemberType ⇒ new structure describing the types of analytical members.
     • API_AnalyticalCurve ⇒ new structure describing a curve as a geometric element of an analytical member.
     • API_AnalyticalCurveMember ⇒ new structure describing a 1D analytical member.
     • API_AnalyticalPlaneSurface ⇒ new structure describing a planar geometric element for an analytical member.
     • API_AnalyticalCylinderSurface ⇒ new structure describing a cylindiral surface as a geometric element for an analytical member.
     • API_AnalyticalSurface ⇒ new structure describing the geometry of an analytical surface member.
     • API_AnalyticalSurfaceType ⇒ new structure describing the types of analytical surface members.
     • API_AnalyticalSurfaceMember ⇒ new structure describing an analytical surface member.
     • API_AnalyticalMemberPartRef ⇒ new structure describing an analytical part reference.
     • API_AnalyticalMemberPartRefType ⇒ new structure describing the types of analytical part references.
     • API_InternalAnalyticalMemberPartId ⇒ new structure describing an edge inside the analytical part reference.
     • API_AnalyticalReleaseDescription ⇒ new structure describing an analytical release.
     • API_AnalyticalReleaseType ⇒ new structure describing the types of analytical releases.
     • API_AnalyticalRigidityType ⇒ new structure describing the rigidity types of analytical member releases.
     • API_ExportIdMappingType ⇒ new structure describing the mapping between the connected analytical elements parts and the analytical surface member’s edges.
     • API_ImportIdMappingType ⇒ new structure describing the mapping between the analytical surface member’s edges and the connected analytical elements parts.
     • API_AnalyticalElemPartId ⇒ new structure describing the analytical surface member’s parts.
     • Analytical Links
       • API_AnalyticalLink_LinkType ⇒ new structure describing types of an analytical link.
       • API_AnalyticalLink_RigidLinkConnectionType ⇒ new structure describing types of a rigid analytical connection.
       • API_AnalyticalLink_RigidSettings ⇒ new structure describing the rigidity parameters of an analytical link.
       • API_AnalyticalLink_Rotation ⇒ new structure describing the rotational properties of an analytical link.
       • API_AnalyticalLink_SpringSettings ⇒ new structure describing the translation properties of an analytical link.
       • API_AnalyticalLink_SpringSettings ⇒ new structure describing the spring settings of an analytical link.
       • API_AnalyticalLink_Settings ⇒ new structure describing the settings of an analytical link.
       • API_AnalyticalLinkType ⇒ new structure describing an analytical link.
     • Analytical Supports
       • API_AnalyticalSupport_Settings ⇒ new structure describing the settings of an analytical support.
       • API_AnalyticalSupport_SupportType ⇒ new structure describing the types of analytical supports.
       • API_AnalyticalSupport_SupportValues ⇒ new structure describing the rigidity properties of an analytical support.
       • API_AnalyticalSupportType ⇒ new structure describing the types of analytical supports.
   • API_Property ⇒ status member is introduced
   • API_NavigatorItem ⇒ sourceGuid member is introduced
   • API_NavigatorItemTypeID ⇒ API_DrawingNavItem is introduced
   
   
3. Modified/new functions
   • ACAPI_MarkUp_Change: function is removed. To change tag, use ACAPI_MarkUp_AttachElements with a word type element.
   • ACAPI_Element_GetRelations 
   • ACAPI_Inform_AdditionalFileWasCreated: informs Archicad about the additionally created file during exporting or publishing.
   • Analytical Model
     • ACAPI_AnalyticalModel_GetAnalyticalModelVariation: get the analytical model variation of an analytical model.
     • ACAPI_AnalyticalModel_GetAnalyticalModel: get the ID of a certain variation of the analytical model.
     • ACAPI_AnalyticalModel_GetCurrentAnalyticalModel: get the ID of the analytical model in the current view.
     • ACAPI_AnalyticalModel_UpdateAnalyticalModel: Update the specified analytical model.
     • Querying Existing Elements
       • ACAPI_AnalyticalModel_GetAnalyticalMemberConnections: get the guids of elements which are connected to a Structural Analytical Member.
       • ACAPI_AnalyticalModel_GetCurveElements: get the IDs of all the load-bearing curve elements in the analytical model.
       • ACAPI_AnalyticalModel_GetCurveMember: get the specified curve member.
       • ACAPI_AnalyticalModel_GetCurveMemberProfileVectorImage: get the profile vector image of a curve member.
       • ACAPI_AnalyticalModel_GetSurfaceElements: get the IDs of all the load-bearing surface members in the analytical model.
       • ACAPI_AnalyticalModel_GetSurfaceMember: get the specified surface member.
       • ACAPI_AnalyticalModel_GetSegmentedSurfaceMember: get the specified surface member where the result’s surface is segmented (except the edges).
       • ACAPI_AnalyticalModel_GetAnalyticalRelease: get the release properties for an analytical member.
       • ACAPI_AnalyticalModel_GetComplementaryProjectMemberType: get the type of analytical member if it exists in the complementary project.
     • Creating or Modifying Elements
       • ACAPI_AnalyticalModel_CreateElementFromCurveMember: create a model element based on a curve member.
       • ACAPI_AnalyticalModel_CreateElementFromSurfaceMember: create a model element based on a surface member.
       • ACAPI_AnalyticalModel_CreateElementFromSegmentedSurfaceMember: create a model element based on segmented surface member.
       • ACAPI_AnalyticalModel_SetAnalyticalRelease: set the release properties for an analytical member.
   • ACAPI_Element_GetPropertyValue ⇒ modified function return value.
   • APINavigator_NewNavigatorViewID ⇒ changed parameter list: parentAndChildGuids replaced with parent and previousSibling.
   • ACAPI_Navigator ⇒ new ACAPI_Navigator value: APINavigator_CloneProjectMapItemToViewMapID.
   • ACAPI_Environment ⇒ new ACAPI_Environment value: APIEnv_CreateLayoutID.

Note: You may also check the list of the new API features in the former Archicad versions.