API Constants Changed in Version 2026.0

General constants used throughout the interface.

MKI_INTERFACE_VERSION (6260) Changed in Version 2026.0

Current version of the CAD6interface at compiling time. Use this value to compare it to the InterfaceVersion parameter of the MKI_PlugInInit procedure.

MKI_MKD_VERSION (6260) Changed in Version 2026.0

Current version of the CAD6 file format at compiling time.

MKI_MAIN_WINDOW_CLASS (L"MKCAD6_MainWClass")

Name of the application’s main window class for CAD6studio and CAD6industrie. Use this string as a parameter of FindWindow to retrieve the handle of the application’s main window.

MKI_STARTER_WINDOW_CLASS (L"MKCAD6_StarterWClass") New in Version 2024.2

Name of the application’s main window class for CAD6starter. Use this string as a parameter of FindWindow to retrieve the handle of the application’s main window.

MKI_ENGINE_WINDOW_CLASS (L"MKCAD6_EngineWClass") New in Version 2025.1

Name of the engine’s interface window class for CAD6engine. Use this string as a parameter of FindWindow to retrieve the handle of the engine’s interface window.

MKI_INI_65_HEADER ("Malz++Kassner INI 6.50")

File identification for Malz++Kassner INI 6.50 files.

MKI_INI_70_HEADER ("Malz++Kassner INI 7.00")

File identification for Malz++Kassner INI 7.00 files.

MKI_MKD_460_HEADER ("Malz++Kassner CAD 4.60")

File identification for Malz++Kassner MKD 4.60 files.

MKI_MKD_500_HEADER ("Malz++Kassner CAD 5.00")

File identification for Malz++Kassner MKD 5.00 files.

MKI_MKD_600_HEADER ("Malz++Kassner CAD 6.00")

File identification for Malz++Kassner MKD 6.00 files.

MKI_MKD_610_HEADER ("Malz++Kassner CAD 6.10")

File identification for Malz++Kassner MKD 6.10 files.

MKI_MKD_620_HEADER ("Malz++Kassner CAD 6.20")

File identification for Malz++Kassner MKD 6.20 files.

MKI_MKD_630_HEADER ("Malz++Kassner CAD 6.30")

File identification for Malz++Kassner MKD 6.30 files.

MKI_MKD_640_HEADER ("Malz++Kassner CAD 6.40")

File identification for Malz++Kassner MKD 6.40 files.

MKI_MKD_650_HEADER ("Malz++Kassner CAD 6.50")

File identification for Malz++Kassner MKD 6.50 files.

MKI_MKD_660_HEADER ("Malz++Kassner CAD 6.60")

File identification for Malz++Kassner MKD 6.60 files.

MKI_MKD_661_HEADER ("Malz++Kassner CAD 6.61")

File identification for Malz++Kassner MKD 6.61 files.

MKI_MKD_6100_HEADER ("Malz++Kassner CAD6.100")

File identification for Malz++Kassner MKD 6100 files (Release 2010).

MKI_MKD_6110_HEADER ("Malz++Kassner CAD 6110")

File identification for Malz++Kassner MKD 6110 files (Release 2011).

MKI_MKD_6120_HEADER ("Malz++Kassner CAD 6120")

File identification for Malz++Kassner MKD 6120 files (Release 2012).

MKI_MKD_6121_HEADER ("Malz++Kassner CAD 6121")

File identification for Malz++Kassner MKD 6121 files (Release 2012 SP1).

MKI_MKD_6130_HEADER ("Malz++Kassner CAD 6130")

File identification for Malz++Kassner MKD 6130 files (Release 2013).

MKI_MKD_6132_HEADER ("Malz++Kassner CAD 6132")

File identification for Malz++Kassner MKD 6132 files (Release 2013 SP2).

MKI_MKD_6140_HEADER ("Malz++Kassner CAD 6140")

File identification for Malz++Kassner MKD 6140 files (Release 2014).

MKI_MKD_6142_HEADER ("Malz++Kassner CAD 6142")

File identification for Malz++Kassner MKD 6142 files (Release 2014 SP2).

MKI_MKD_6150_HEADER ("Malz++Kassner CAD 6150")

File identification for Malz++Kassner MKD 6150 files (Release 2015).

MKI_MKD_6160_HEADER ("Malz++Kassner CAD 6160")

File identification for Malz++Kassner MKD 6160 files (Release 2016).

MKI_MKD_6170_HEADER ("Malz++Kassner CAD 6170")

File identification for Malz++Kassner MKD 6170 files (Release 2017).

MKI_MKD_6171_HEADER ("Malz++Kassner CAD 6171")

File identification for Malz++Kassner MKD 6171 files (Release 2017 SP1).

MKI_MKD_6180_HEADER ("Malz++Kassner CAD 6180")

File identification for Malz++Kassner MKD 6180 files (Release 2018).

MKI_MKD_6181_HEADER ("Malz++Kassner CAD 6181")

File identification for Malz++Kassner MKD 6181 files (Release 2018 SP1).

MKI_MKD_6182_HEADER ("Malz++Kassner CAD 6182")

File identification for Malz++Kassner MKD 6182 files (Release 2018 SP2).

MKI_MKD_6190_HEADER ("Malz++Kassner CAD 6190")

File identification for Malz++Kassner MKD 6190 files (Release 2019).

MKI_MKD_6191_HEADER ("Malz++Kassner CAD 6191")

File identification for Malz++Kassner MKD 6191 files (Release 2019 SP1).

MKI_MKD_6200_HEADER ("Malz++Kassner CAD 6200")

File identification for Malz++Kassner MKD 6200 files (Release 2020.0).

MKI_MKD_6201_HEADER ("Malz++Kassner CAD 6201")

File identification for Malz++Kassner MKD 6201 files (Release 2020.1).

MKI_MKD_6210_HEADER ("Malz++Kassner CAD 6210")

File identification for Malz++Kassner MKD 6210 files (Release 2021.0).

MKI_MKD_6211_HEADER ("Malz++Kassner CAD 6211")

File identification for Malz++Kassner MKD 6211 files (Release 2021.1).

MKI_MKD_6212_HEADER ("Malz++Kassner CAD 6212")

File identification for Malz++Kassner MKD 6212 files (Release 2021.2).

MKI_MKD_6220_HEADER ("Malz++Kassner CAD 6220")

File identification for Malz++Kassner MKD 6220 files (Release 2022.0).

MKI_MKD_6222_HEADER ("Malz++Kassner CAD 6222")

File identification for Malz++Kassner MKD 6222 files (Release 2022.2).

MKI_MKD_6230_HEADER ("Malz++Kassner CAD 6230")

File identification for Malz++Kassner MKD 6230 files (Release 2023.0).

MKI_MKD_6231_HEADER ("Malz++Kassner CAD 6231")

File identification for Malz++Kassner MKD 6231 files (Release 2023.1).

MKI_MKD_6240_HEADER ("Malz++Kassner CAD 6240")

File identification for Malz++Kassner MKD 6240 files (Release 2024.0).

MKI_MKD_6242_HEADER ("Malz++Kassner CAD 6242")

File identification for Malz++Kassner MKD 6242 files (Release 2024.2).

MKI_MKD_6250_HEADER ("Malz++Kassner CAD 6250")

File identification for Malz++Kassner MKD 6250 files (Release 2025.0).

MKI_MKD_6260_HEADER ("Malz++Kassner CAD 6260")

File identification for Malz++Kassner MKD 6260 files (Release 2026.0).

MKI_UTF8_BOM_TEXT ("")

Identification of UTF-8 files (first 3 chars of the file)

MKI_UTF8_BOM_CHAR1 ('ï')

Identification of UTF-8 files (char 1 of the file)

MKI_UTF8_BOM_CHAR2 ('»')

Identification of UTF-8 files (char 2 of the file)

MKI_UTF8_BOM_CHAR3 ('¿')

Identification of UTF-8 files (char 3 of the file)

MKI_BLOCK_ID (L"*")

Library title of internal blocks.

MKI_BLOCK_INDEX (999)

Library index of internal blocks.

MKI_BLOCKS_PER_DRAWING (1,000,000) Changed in Version 2020.0

Maximum number of blocks in a drawing or library.

MKI_BLOCKS_PER_FONT (224)

Maximum number of characters in a font library.

MKI_NESTING_DEPTH_MAX (25) New in Version 2017.0

Maximum nesting depth of entities (e.g. within groups, clippings, or instances).

MKI_POINTS_PER_PATCH (4)

Maximum number of points per patch.

MKI_ATTRIBS_PER_OBJECT (200)

Maximum number of attributes per block or instance.

MKI_ATTRIBS_PER_PARTSLIST (50) New in Version 2021.1

Maximum number of attributes per parts list.

MKI_BYTES_PER_BINARY (144)

Recommended maximum number of bytes per binary block.

MKI_LENGTH_PATH (260) New in Version 2020.0

Maximum length (in characters) of a file name with path.

MKI_LENGTH_TEXT_SHORT (500) Changed in Version 6.30

Maximum length (in bytes) of a "short" text, as used for dimensions.

MKI_LENGTH_TEXT_LONG (30000) Changed in Version 6.30

Maximum length (in bytes) of a "long" text, as used for standard texts, frame texts, and comments.

MKI_LENGTH_VARIABLE (500) New in Version 2017.1

Maximum length (in bytes) of a variable's text.

MKI_LENGTH_ATTRIBUTE (4000) New in Version 2017.1

Maximum length (in bytes) of an attribute's text.

MKI_LENGTH_BINARY (32,700) New in Version 6.50

Maximum length (in bytes) of a binary data block.

MKI_LENGTH_FILE_ID (22)

Maximum length (in bytes) of Malz++Kassner file identification (MKI_MKD_??_HEADER).

MKI_LENGTH_FILE_EXIT (64) New in Version 6.50

Maximum length (in bytes) of Malz++Kassner file termination (=EXIT= plus CRC).

MKI_CUSTOMMENU_MAX (100)

Maximum number of custom menus in toolbox and panel.

MKI_CUSTOMMENU_SIZE (30)

Number of entries per custom menu.

MKI_TOOLBOX_COLUMNS (20)

Maximum number of button columns in the application's toolbox.

MKI_TOOLBOX_ROWS (50)

Maximum number of button rows in the application's toolbox.

MKI_TOOLBOX_MAX (MKI_TOOLBOX_COLUMNS*MKI_TOOLBOX_ROWS)

Maximum number of buttons in the application's toolbox.

MKI_PANEL_COLUMNS (2) New in Version 2012.0

Maximum number of toolbox button columns in the application's panel.

MKI_PANEL_ROWS (50) New in Version 2012.0

Maximum number of toolbox button rows in the application's panel.

MKI_PANEL_MAX (MKI_PANEL_COLUMNS*MKI_PANEL_ROWS) Changed in Version 2012.0

Maximum number of command buttons in the application's panel.

MKI_PARAMETER_MAX (30) New in Version 2023.2

Maximum number of buttons in the application's parameter window.

MKI_COMMANDBAR_MAX (50) New in Version 2012.0

Maximum number of button groups in the application's command bar.

MKI_BLOCKLIST_COLUMNS (10) New in Version 2032.2

Maximum number of button columns in the application's block list.

MKI_BLOCKLIST_ROWS (50) Changed in Version 2050.0

Maximum number of button rows in the application's block list.

MKI_BLOCKLIST_MAX (MKI_BLOCKLIST_COLUMNS*MKI_BLOCKLIST_ROWS) Changed in Version 6.50

Maximum number of buttons in the application's block list.

MKI_CUSTOMKEY_MAX (1,000)

Maximum number of custom (user-defined) key assignment.

MKI_VARIABLE_MAX (1,000) Changed in Version 6.40

Maximum number of global variables per drawing.

MKI_DEFAULT_MAX (16) Changed in Version 6.11

Maximum number of default settings for pens and layers per drawing.

MKI_SYSTEM_MAX (100) Changed in Version 2023.0

Maximum number of coordinate systems per drawing (excluding coordinate system 0 "- Standard -").

MKI_HATCHLINE_MAX (8)

Maximum number of lines per hatching line sequence.

MKI_ORTHO_MAX (8)

Number of ortho mode angles.

MKI_PAGE_MAX (1,000) Changed in Version 2016.0

Maximum number of page definitions per drawing.

MKI_PAGE_MODEL (-1) New in Version 2024.0

Page index of Model Space.

MKI_PAGE_NOVAL (9,999) New in Version 2024.0

Invalid / undefined page number.

MKI_HATCH_MAX (1,000) Changed in Version 2023.2

Maximum number of hatch types per drawing (excluding hatching 0 "- Standard -").

MKI_LINE_MAX (1,000)

Maximum number of line types per drawing (excluding line type 0 "- Solid Line -").

MKI_LINEBLOCK_MAX (1,000)

Maximum number of block-based line types per drawing.

MKI_LINEPART_MAX (16)

Maximum number of line parts per line type.

MKI_PEN_MAX (1,000)

Maximum number of pen definitions per drawing (excluding pen 0).

MKI_LAYER_MAX (2,000)

Maximum number of layer definitions per drawing (excluding layer 0).

MKI_INTERN_FILLMODE_MAX (5) New in Version 2012.1

Number of filling mode buttons in the command bar.

MKI_INTERN_LINEWIDTH_MAX (6) Changed in Version 2023.1

Number of line width buttons in the command bar.

MKI_INTERN_COLOR_MAX (10) Changed in Version 2023.1

Number of line and filling color buttons in the command bar.

MKI_MIXER_MAX (3) New in Version 2014.0

Number of colors in the color mixer.

MKI_TASK_MAX (1,000) Renamed in Version 2023.1

Number of tasks.

MKI_SYSTEMCOLOR_RGB_MIN (2,000) New in Version 6.60

MKI_SYSTEMCOLOR_RGB_MAX (MKI_SYSTEMCOLOR_RGB_MIN + 40)

Range of standard RGB colors.

MKI_SYSTEMCOLOR_CMYK_MIN (2,100) New in Version 6.60

MKI_SYSTEMCOLOR_CMYK_MAX (MKI_SYSTEMCOLOR_CMYK_MIN + 40)

Range of standard CMYK colors.

MKI_SYSTEMCOLOR_GRAY_MIN (2,200) New in Version 6.60

MKI_SYSTEMCOLOR_GRAY_MAX (MKI_SYSTEMCOLOR_GRAY_MIN + 40)

Range of standard grayscales.

MKI_SYSTEMCOLOR_LAB_MIN (2,300) New in Version 6.60

MKI_SYSTEMCOLOR_LAB_MAX (MKI_SYSTEMCOLOR_LAB_MIN + 40)

Range of standard LAB colors.

MKI_STANDARDCOLOR_N_MIN (2,400) New in Version 6.60

MKI_STANDARDCOLOR_N_MAX (MKI_STANDARDCOLOR_N_MIN + 86)

Range of standard printing colors for uncoated paper (N).

MKI_STANDARDCOLOR_K_MIN (2,500) New in Version 6.60

MKI_STANDARDCOLOR_K_MAX (MKI_STANDARDCOLOR_K_MIN + 86)

Range of standard printing colors for coated paper (K).

MKI_STANDARDCOLOR_R_MIN (2,600) New in Version 6.60

MKI_STANDARDCOLOR_R_MAX (MKI_STANDARDCOLOR_R_MIN + 195)

Range of standard colors for paint and foil (R).

MKI_STANDARDCOLOR_P_MIN (2,800) New in Version 2014.0

MKI_STANDARDCOLOR_P_MAX (MKI_STANDARDCOLOR_P_MIN + 658)

Range of standard colors for paint and foil (R).

MKI_CUSTOMCOLOR_MAX (1,000)

Maximum number of custom (user-defined) colors.

MKI_DIMLINEPARAM_TOTAL (3)

Number of dimension parameter sets of type DIMLINE.

MKI_DIMLARGEPARAM_TOTAL (13)

Number of dimension parameter sets of type DIMLARGE.

MKI_DIMSMALLPARAM_TOTAL (3)

Number of dimension parameter sets of type DIMSMALL.

MKI_DIMTEXTPARAM_TOTAL (7)

Number of texts per dimension.

MKI_WINDOW_MAX (4)

Maximum number of concurrent drawing windows.

MKI_WINDOW_VIEW (999)

Window index of view window.

MKI_RECENT_BLOCK_MAX (100) New in Version 2021.1

Maximum number of entries in the recent blocks list.

MKI_RECENT_DRAWING_MAX (100) Renamed in Version 2020.1

Maximum number of entries in the recent drawings list.

MKI_RECENT_FONT_MAX (10) New in Version 2020.1

Maximum number of entries in the recent fonts list.

MKI_FONT_MAX (20) Changed in Version 2012.0

Maximum number of internal (MKL) fonts opened.

MKI_FONT_SUBSTITUTE_MAX (50)

Size of font substitution list.

MKI_COLLECTION_MAX (50) New in Version 2020.0

Maximum number of collections and notebooks opened.

MKI_ITEMS_PER_COLLECTION (100,000) New in Version 2020.0

Maximum number of items per collection.

MKI_LIBRARY_MAX (200) Changed in Version 2023.1

Maximum number of libraries opened.

MKI_DATABASE_MAX (100) Changed in Version 2016.0

Maximum number of databases opened.

MKI_DATABASE_INTERNAL_MAX (10) New in Version 2012.0

Maximum number of internal databases opened.

MKI_DATABASE_LINE_MAX (64,000) Changed in Version 2014.2

Maximum length of one database line.

MKI_DATABASE_COLUMN_MAX (500) Changed in Version 6.30

Maximum number of columns in a database line.

MKI_SERIAL_INDEX_MAX (10,000)

Maximum number of database entries for serial printing.

MKI_SERIAL_FILTER_MAX (4)

Maximum number of filtering criteria for serial printing.

MKI_SERIAL_SORT_MAX (4)

Maximum number of sorting criteria for serial printing.

MKI_SERIAL_RULE_MAX (4)

Maximum number of rules for serial printing.

MKI_PRINTER_MAX (8) Changed in Version 6.40

Maximum number of printer settings.

MKI_PRINTER_POLYGON_MAX (100) New in Version 2018.1

Maximum number of printing area polygon points.

MKI_BITMAP_MAX (1,000)

Maximum number of bitmaps opened.

MKI_PROCESSOR_MAX (16) New in Version 2012.0

Maximum number of concurrently used processor cores.

MKI_EXTERNAL_MAX (200) Changed in Version 2025.2

Maximum number of external drawing references.

MKI_HYPERLINK_MAX (1,000)

Maximum number of hyperlinks.

MKI_COMMENT_MAX (1,000) New in Version 2019.1

Maximum number of comments.

MKI_UNDO_MAX (1,000)

Maximum number of undo steps.

MKI_POSNO_RANGE_MAX (10) New in Version 2021.1

Number of position number ranges.

MKI_POSNO_MAX (10,000)

Maximum number of position numbers.

MKI_SUBCLASS_MAX (1,000) New in Version 2024.0

Maximum number of subclass controls in a dialog.

MKI_DEFPATH_MAX (20) Changed in Version 6.41

Maximum number of standard paths per file type.

MKI_FILTER_MAX (20)

Maximum number of filters loaded. This maximum value applies to import and export filters separately, i.e. the total number of filters is 2 * MKI_FILTER_MAX.

MKI_PLUGIN_MAX (50) Changed in Version 6.40

Maximum number of loaded plug-ins.

MKI_PLUGIN_MENU_MAX (200)

Maximum number of items in a plug-in's menu.

MKI_PLUGIN_SUBMENU_MAX (30)

Maximum number of items in a plug-in's submenu.

MKI_PLUGIN_EXT_MAX (100)

Maximum number of custom-defined object types at a time.

MKI_PLUGIN_CONTEXT_MAX (10) New in Version 2023.2

Maximum number of context menu commands at a time.

MKI_PLUGIN_BUTTON_MAX (50)

Maximum number of plug-in window buttons per plug-in.

MKI_PLUGIN_TOTAL_MAX (MKI_PLUGIN_MAX + 2 * MKI_FILTER_MAX)

Maximum total number of plug-ins.

MKI_INPUT_MAX (1,000) Changed in Version 2021.2

Maximum number of points to be entered per object input.

MKI_INPUT_DEF_MAX (8)

Maximum number of predefined point entries per command.

MKI_POLYPOLY_MAX (30,000) Changed in Version 2023.0

Maximum number of nested outlines in a curve or surface, or nested curves in a hatching.

MKI_DB_SIZE_MAX (32,000)

Maximum size of a data block in bytes.

MKI_DRAWING_PREVIEW_SIZE (250) Changed in Version 2017.1

Default height and width of a preview bitmap.

MKI_UNIQUE_ID_SIZE (16)

Size of a unique ID in bytes.

MKI_COORD_MIN (-1.0e12) Changed in Version 2017.0

Minimum coordinate allowed.

MKI_COORD_MAX (1.0e12) Changed in Version 2017.0

Maximum coordinate allowed.

MKI_EDIT_MIN (1.0e-10)

Minimum value allowed for most entry types.

MKI_EDIT_MAX (1.0e10)

Maximum value allowed for most entry types.

MKI_DB_SIZE_POINT

Default size of a data block of type MKI_DB_TYPE_POINT (including one point structure).

MKI_DB_SIZE_CONSTANT

Default size of a data block of type MKI_DB_TYPE_DOUBLE, subtype MKI_DB_ALL_CONSTANT.

MKI_DB_SIZE_ARC

Default size of a data block of type MKI_DB_TYPE_DOUBLE, subtype MKI_DB_ALL_ARC.

MKI_DB_SIZE_CURVE

Default size of a data block of type MKI_DB_TYPE_DOUBLE, subtype MKI_DB_ALL_CURVE.

MKI_DB_SIZE_TEXT

Default size of a data block of type MKI_DB_TYPE_TEXT (without any text).

MKI_DB_SIZE_END

Default size of a data block of type MKI_DB_TYPE_NATIVE, subtype MKI_DB_END.

MKI_DB_SIZE_ANY

Default size of any data block of type (without data).