ObjectARX Migration Guide

Description

Information about how to update existing ObjectARX® applications to work with AutoCAD® 2026 is provided here.

AutoCAD 2026 is a binary compatibility release and ObjectARX applications developed for AutoCAD 2025 shouldn't need to be recompiled. ObjectARX applications developed for AutoCAD 2024 and earlier releases will need to be recompiled. The following sections list API changes made to this release. If your application uses any of these APIs, you will need to update your code accordingly.

Deprecated ObjectARX API

Class	Topic	Declaration	Use Instead
AcDb2dPolyline	AcDb2dPolyline::openVertex	ACDBCORE2D_PORT Acad::ErrorStatus openVertex(AcDb2dVertex*&, AcDbObjectId vertId, AcDb::OpenMode, bool openErasedOne = false) const;	Acad::ErrorStatus acdbOpenObject(AcDbObject*& pObj, AcDbObjectId id, AcDb::OpenMode mode = AcDb::kForRead, bool openErased = false);
AcDb3dPolyline	AcDb3dPolyline::openVertex	ACDBCORE2D_PORT Acad::ErrorStatus openVertex(AcDb3dPolylineVertex*&, AcDbObjectId vertId, AcDb::OpenMode, bool openErasedOne = false);	Acad::ErrorStatus acdbOpenObject(AcDbObject*& pObj, AcDbObjectId id, AcDb::OpenMode mode = AcDb::kForRead, bool openErased = false);
AcDbPlotSettings	AcDbPlotSettings::getStyleSheetReadStream	ADESK_DEPRECATED ACDBCORE2D_PORT IAcReadStream* getStyleSheetReadStream();
AcDbPolyFaceMesh	AcDbPolyFaceMesh::openVertex	ACDBCORE2D_PORT Acad::ErrorStatus openVertex(AcDbVertex*&, AcDbObjectId subObjId, AcDb::OpenMode, bool openErasedOne = false);	Acad::ErrorStatus acdbOpenObject(AcDbObject*& pObj, AcDbObjectId id, AcDb::OpenMode mode = AcDb::kForRead, bool openErased = false);
AcDbPolygonMesh	AcDbPolygonMesh::openVertex	ACDBCORE2D_PORT Acad::ErrorStatus openVertex(AcDbPolygonMeshVertex*&, AcDbObjectId vertId, AcDb::OpenMode, bool openErasedOne = false);	Acad::ErrorStatus acdbOpenObject(AcDbObject*& pObj, AcDbObjectId id, AcDb::OpenMode mode = AcDb::kForRead, bool openErased = false);

Removed ObjectARX API

Class	Topic	Declaration	Use Instead
	acdbDwkFileExists	ACDBCORE2D_PORT bool ADESK_STDCALL acdbDwkFileExists(const ACHAR *pszFileName);	Use the OS API and search for the drawing lock (DWL) file of the current drawing.

Changed ObjectARX API

Class	Topic	Previous Declaration	Declaration
AcDMMNode	AcDMMNode::AcDMMNode	AutoCAD 2025 and EarlierAcDMMNode(int number, wchar_t * name);	AcDMMNode(int number, const wchar_t * name);

Changed Enum

Topic	Previous Declaration	Declaration
AcDbHostApplicationServices::FindFileHint Enumeration	enum FindFileHint {kDefault = 0,kFontFile,kCompiledShapeFile,kTrueTypeFontFile,kEmbeddedImageFile,kXRefDrawing,kPatternFile,kARXApplication,kFontMapFile,kUnderlayFile,kDataLinkFile,kPhotometricWebFile,kMaterialMapFile,kCloudOrProjectFile};	enum FindFileHint { kDefault = 0, kFontFile, kCompiledShapeFile, kTrueTypeFontFile, kEmbeddedImageFile, kXRefDrawing, kPatternFile, kARXApplication, kFontMapFile, kUnderlayFile, kDataLinkFile, kPhotometricWebFile, kMaterialMapFile, kCloudOrProjectFile, kLinetypeFile, kDrawingStandardsFile, kMLineStyleFile};
AcDbPointCloudDefEx::Property Enumeration	enum Property {kColor = 1,kIntensity = 2,kClassification = 3,kNormal = 4,kSegmentation = 5,kGeoGraphic = 6};	enum Property { kColor = 1, kIntensity = 2, kClassification = 3, kNormal = 4, kSegmentation = 5, kGeoGraphic = 6, kTerrestrialClassification = 7};
MaintenanceReleaseVersion	enum MaintenanceReleaseVersion {kMRelease0 = 0,kMRelease1 = 1,kMRelease2 = 2,kMRelease3 = 3,kMRelease4 = 4,kMRelease5 = 5,kMRelease6 = 6,kMRelease7 = 7,kMRelease8 = 8,kMRelease9 = 9,kMRelease10 = 10,kMRelease11 = 11,kMRelease12 = 12,kMRelease13 = 13,kMRelease14 = 14,kMRelease15 = 15,kMRelease16 = 16,kMRelease17 = 17,kMRelease18 = 18,kMRelease19 = 19,kMRelease20 = 20,kMRelease21 = 21,kMRelease22 = 22,kMRelease23 = 23,kMRelease24 = 24,kMRelease25 = 25,kMRelease26 = 26,kMRelease27 = 27,kMRelease28 = 28,kMRelease29 = 29,kMRelease30 = 30,kMRelease31 = 31,kMRelease32 = 32,kMRelease33 = 33,kMRelease34 = 34,kMRelease35 = 35,kMRelease36 = 36,kMRelease37 = 37,kMRelease38 = 38,kMRelease39 = 39,kMRelease40 = 40,kMRelease41 = 41,kMReleaseFirstValid1500 = kMRelease41,kMRelease42 = 42,kMRelease43 = 43,kMRelease44 = 44,kMRelease45 = 45,kMRelease46 = 46,kMRelease47 = 47,kMRelease48 = 48,kMRelease49 = 49,kMRelease50 = 50,kMRelease51 = 51,kMRelease52 = 52,kMRelease53 = 53,kMRelease54 = 54,kMRelease55 = 55,kMRelease56 = 56,kMRelease57 = 57,kMRelease58 = 58,kMRelease59 = 59,kMRelease60 = 60,kMRelease61 = 61,kMRelease62 = 62,kMRelease63 = 63,kMRelease64 = 64,kMRelease65 = 65,kMRelease66 = 66,kMRelease67 = 67,kMRelease68 = 68,kMRelease69 = 69,kMRelease70 = 70,kMRelease71 = 71,kMRelease72 = 72,kMRelease73 = 73,kMRelease74 = 74,kMRelease75 = 75,kMRelease76 = 76,kMRelease77 = 77,kMRelease78 = 78,kMRelease79 = 79,kMRelease80 = 80,kMRelease81 = 81,kMRelease82 = 82,kMRelease83 = 83,kMRelease84 = 84,kMRelease85 = 85,kMRelease86 = 86,kMRelease87 = 87,kMRelease88 = 88,kMRelease89 = 89,kMRelease90 = 90,kMRelease91 = 91,kMRelease92 = 92,kMRelease93 = 93,kMRelease94 = 94,kMRelease95 = 95,kMRelease96 = 96,kMRelease97 = 97,kMRelease98 = 98,kMRelease99 = 99,kMRelease100 = 100,kMRelease101 = 101,kMRelease102 = 102,kMRelease103 = 103,kMRelease104 = 104,kMRelease105 = 105,kMRelease106 = 106,kMRelease107 = 107,kMRelease108 = 108,kMRelease109 = 109,kMRelease110 = 110,kMRelease111 = 111,kMRelease112 = 112,kMRelease113 = 113,kMRelease114 = 114,kMRelease115 = 115,kMRelease116 = 116,kMRelease117 = 117,kMRelease118 = 118,kMRelease119 = 119,kMRelease120 = 120,kMRelease121 = 121,kMRelease122 = 122,kMRelease123 = 123,kMRelease124 = 124,kMRelease125 = 125,kMRelease126 = 126,kMRelease127 = 127,kMRelease128 = 128,kMRelease129 = 129,kMRelease130 = 130,kMRelease131 = 131,kMRelease132 = 132,kMRelease133 = 133,kMRelease134 = 134,kMRelease135 = 135,kMRelease136 = 136,kMRelease137 = 137,kMRelease138 = 138,kMRelease139 = 139,kMRelease140 = 140,kMRelease141 = 141,kMRelease142 = 142,kMRelease143 = 143,kMRelease144 = 144,kMRelease145 = 145,kMRelease146 = 146,kMRelease147 = 147,kMRelease148 = 148,kMRelease149 = 149,kMRelease150 = 150,kMRelease151 = 151,kMRelease152 = 152,kMRelease153 = 153,kMRelease154 = 154,kMRelease155 = 155,kMRelease156 = 156,kMRelease157 = 157,kMRelease158 = 158,kMRelease159 = 159,kMRelease160 = 160,kMRelease161 = 161,kMRelease162 = 162,kMRelease163 = 163,kMRelease164 = 164,kMRelease165 = 165,kMRelease166 = 166,kMRelease167 = 167,kMRelease168 = 168,kMRelease169 = 169,kMRelease170 = 170,kMRelease171 = 171,kMRelease172 = 172,kMRelease173 = 173,kMRelease174 = 174,kMRelease175 = 175,kMRelease176 = 176,kMRelease177 = 177,kMRelease178 = 178,kMRelease179 = 179,kMRelease180 = 180,kMRelease181 = 181,kMRelease182 = 182,kMRelease183 = 183,kMRelease184 = 184,kMRelease185 = 185,kMRelease186 = 186,kMRelease187 = 187,kMRelease188 = 188,kMRelease189 = 189,kMRelease190 = 190,kMRelease191 = 191,kMRelease192 = 192,kMRelease193 = 193,kMRelease194 = 194,kMRelease195 = 195,kMRelease196 = 196,kMRelease197 = 197,kMRelease198 = 198,kMRelease199 = 199,kMRelease200 = 200,kMRelease201 = 201,kMRelease202 = 202,kMRelease203 = 203,kMRelease204 = 204,kMRelease205 = 205,kMRelease206 = 206,kMRelease207 = 207,kMRelease208 = 208,kMRelease209 = 209,kMRelease210 = 210,kMRelease211 = 211,kMRelease212 = 212,kMRelease213 = 213,kMRelease214 = 214,kMRelease215 = 215,kMRelease216 = 216,kMRelease217 = 217,kMRelease218 = 218,kMRelease219 = 219,kMRelease220 = 220,kMRelease221 = 221,kMRelease222 = 222,kMRelease223 = 223,kMRelease224 = 224,kMRelease225 = 225,kMRelease226 = 226,kMRelease227 = 227,kMRelease228 = 228,kMRelease229 = 229,kMRelease230 = 230,kMRelease231 = 231,kMRelease232 = 232,kMRelease233 = 233,kMRelease234 = 234,kMRelease235 = 235,kMRelease236 = 236,kMRelease237 = 237,kMRelease238 = 238,kMRelease239 = 239,kMRelease240 = 240,kMRelease241 = 241,kMRelease242 = 242,kMRelease243 = 243,kMRelease244 = 244,kMRelease245 = 245,kMRelease246 = 246,kMRelease247 = 247,kMRelease248 = 248,kMRelease249 = 249,kMRelease250 = 250,kMRelease251 = 251,kMRelease252 = 252,kMRelease253 = 253,kMRelease254 = 254,kMRelease255 = 255,kMReleaseNewest = 327,kMRelease2010Newest = kMRelease226,kMReleaseCurrent = kMReleaseNewest,kMReleaseUnknown = 2147483646,kMReleaseMax = 2147483647,kMRelease2010Max = 255,kMReleaseExtendedNewest = 377,kMReleaseExtendedCurrent = kMReleaseExtendedNewest,kMReleaseCheckExtended = kMRelease125};	enum MaintenanceReleaseVersion { kMRelease0 = 0, kMRelease1 = 1, kMRelease2 = 2, kMRelease3 = 3, kMRelease4 = 4, kMRelease5 = 5, kMRelease6 = 6, kMRelease7 = 7, kMRelease8 = 8, kMRelease9 = 9, kMRelease10 = 10, kMRelease11 = 11, kMRelease12 = 12, kMRelease13 = 13, kMRelease14 = 14, kMRelease15 = 15, kMRelease16 = 16, kMRelease17 = 17, kMRelease18 = 18, kMRelease19 = 19, kMRelease20 = 20, kMRelease21 = 21, kMRelease22 = 22, kMRelease23 = 23, kMRelease24 = 24, kMRelease25 = 25, kMRelease26 = 26, kMRelease27 = 27, kMRelease28 = 28, kMRelease29 = 29, kMRelease30 = 30, kMRelease31 = 31, kMRelease32 = 32, kMRelease33 = 33, kMRelease34 = 34, kMRelease35 = 35, kMRelease36 = 36, kMRelease37 = 37, kMRelease38 = 38, kMRelease39 = 39, kMRelease40 = 40, kMRelease41 = 41, kMReleaseFirstValid1500 = kMRelease41, kMRelease42 = 42, kMRelease43 = 43, kMRelease44 = 44, kMRelease45 = 45, kMRelease46 = 46, kMRelease47 = 47, kMRelease48 = 48, kMRelease49 = 49, kMRelease50 = 50, kMRelease51 = 51, kMRelease52 = 52, kMRelease53 = 53, kMRelease54 = 54, kMRelease55 = 55, kMRelease56 = 56, kMRelease57 = 57, kMRelease58 = 58, kMRelease59 = 59, kMRelease60 = 60, kMRelease61 = 61, kMRelease62 = 62, kMRelease63 = 63, kMRelease64 = 64, kMRelease65 = 65, kMRelease66 = 66, kMRelease67 = 67, kMRelease68 = 68, kMRelease69 = 69, kMRelease70 = 70, kMRelease71 = 71, kMRelease72 = 72, kMRelease73 = 73, kMRelease74 = 74, kMRelease75 = 75, kMRelease76 = 76, kMRelease77 = 77, kMRelease78 = 78, kMRelease79 = 79, kMRelease80 = 80, kMRelease81 = 81, kMRelease82 = 82, kMRelease83 = 83, kMRelease84 = 84, kMRelease85 = 85, kMRelease86 = 86, kMRelease87 = 87, kMRelease88 = 88, kMRelease89 = 89, kMRelease90 = 90, kMRelease91 = 91, kMRelease92 = 92, kMRelease93 = 93, kMRelease94 = 94, kMRelease95 = 95, kMRelease96 = 96, kMRelease97 = 97, kMRelease98 = 98, kMRelease99 = 99, kMRelease100 = 100, kMRelease101 = 101, kMRelease102 = 102, kMRelease103 = 103, kMRelease104 = 104, kMRelease105 = 105, kMRelease106 = 106, kMRelease107 = 107, kMRelease108 = 108, kMRelease109 = 109, kMRelease110 = 110, kMRelease111 = 111, kMRelease112 = 112, kMRelease113 = 113, kMRelease114 = 114, kMRelease115 = 115, kMRelease116 = 116, kMRelease117 = 117, kMRelease118 = 118, kMRelease119 = 119, kMRelease120 = 120, kMRelease121 = 121, kMRelease122 = 122, kMRelease123 = 123, kMRelease124 = 124, kMRelease125 = 125, kMRelease126 = 126, kMRelease127 = 127, kMRelease128 = 128, kMRelease129 = 129, kMRelease130 = 130, kMRelease131 = 131, kMRelease132 = 132, kMRelease133 = 133, kMRelease134 = 134, kMRelease135 = 135, kMRelease136 = 136, kMRelease137 = 137, kMRelease138 = 138, kMRelease139 = 139, kMRelease140 = 140, kMRelease141 = 141, kMRelease142 = 142, kMRelease143 = 143, kMRelease144 = 144, kMRelease145 = 145, kMRelease146 = 146, kMRelease147 = 147, kMRelease148 = 148, kMRelease149 = 149, kMRelease150 = 150, kMRelease151 = 151, kMRelease152 = 152, kMRelease153 = 153, kMRelease154 = 154, kMRelease155 = 155, kMRelease156 = 156, kMRelease157 = 157, kMRelease158 = 158, kMRelease159 = 159, kMRelease160 = 160, kMRelease161 = 161, kMRelease162 = 162, kMRelease163 = 163, kMRelease164 = 164, kMRelease165 = 165, kMRelease166 = 166, kMRelease167 = 167, kMRelease168 = 168, kMRelease169 = 169, kMRelease170 = 170, kMRelease171 = 171, kMRelease172 = 172, kMRelease173 = 173, kMRelease174 = 174, kMRelease175 = 175, kMRelease176 = 176, kMRelease177 = 177, kMRelease178 = 178, kMRelease179 = 179, kMRelease180 = 180, kMRelease181 = 181, kMRelease182 = 182, kMRelease183 = 183, kMRelease184 = 184, kMRelease185 = 185, kMRelease186 = 186, kMRelease187 = 187, kMRelease188 = 188, kMRelease189 = 189, kMRelease190 = 190, kMRelease191 = 191, kMRelease192 = 192, kMRelease193 = 193, kMRelease194 = 194, kMRelease195 = 195, kMRelease196 = 196, kMRelease197 = 197, kMRelease198 = 198, kMRelease199 = 199, kMRelease200 = 200, kMRelease201 = 201, kMRelease202 = 202, kMRelease203 = 203, kMRelease204 = 204, kMRelease205 = 205, kMRelease206 = 206, kMRelease207 = 207, kMRelease208 = 208, kMRelease209 = 209, kMRelease210 = 210, kMRelease211 = 211, kMRelease212 = 212, kMRelease213 = 213, kMRelease214 = 214, kMRelease215 = 215, kMRelease216 = 216, kMRelease217 = 217, kMRelease218 = 218, kMRelease219 = 219, kMRelease220 = 220, kMRelease221 = 221, kMRelease222 = 222, kMRelease223 = 223, kMRelease224 = 224, kMRelease225 = 225, kMRelease226 = 226, kMRelease227 = 227, kMRelease228 = 228, kMRelease229 = 229, kMRelease230 = 230, kMRelease231 = 231, kMRelease232 = 232, kMRelease233 = 233, kMRelease234 = 234, kMRelease235 = 235, kMRelease236 = 236, kMRelease237 = 237, kMRelease238 = 238, kMRelease239 = 239, kMRelease240 = 240, kMRelease241 = 241, kMRelease242 = 242, kMRelease243 = 243, kMRelease244 = 244, kMRelease245 = 245, kMRelease246 = 246, kMRelease247 = 247, kMRelease248 = 248, kMRelease249 = 249, kMRelease250 = 250, kMRelease251 = 251, kMRelease252 = 252, kMRelease253 = 253, kMRelease254 = 254, kMRelease255 = 255, kMReleaseNewest = 371, kMRelease2010Newest = kMRelease226, kMReleaseCurrent = kMReleaseNewest, kMReleaseUnknown = 2147483646, kMReleaseMax = 2147483647, kMRelease2010Max = 255, kMReleaseExtendedNewest = 421, kMReleaseExtendedCurrent = kMReleaseExtendedNewest, kMReleaseCheckExtended = kMRelease125};