The CADEXTENDEDDATA structure is an extended structure that contains additional information about the entity.
typedef struct _CADEXTENDEDDATA
// ... fields below may be added in future versions;
} CADEXTENDEDDATA, *LPCADEXTENDEDDATA;
Defines the field's type of and its purpose according to the documentation for every single entity.
Please see respective documentation. For instance: CAD_LINE, CAD_POLYLINE, CAD_ELLIPSE, CAD_ARC, CAD_CIRCLE - Param1 type is float and means Thickness (in AutoCAD terms); CAD_ATTRIB - Param1 type is LPCSTR and means Tag.
Defines a value indicating whether a line type of this entity is dotted.
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