1.2

User data may be attached to any drawing entity or to the drawing header and used for storage of entity information, drawing information, custom settings, or indices to external tables. This data can be assigned and retrieved from entities based on the data type and the specified index.

extern "C" float WINAPI VCGetCurrentEntityUserDataFloat(short* iError, short iIndex);
extern "C" void WINAPI VCSetCurrentEntityUserDataFloat(short* iError, short iIndex, float f);

function VCGetCurrentEntityUserDataFloat (var iError: Smallint; iIndex: Smallint): Single; stdcall;
procedure VCSetCurrentEntityUserDataFloat (var iError: Smallint; iIndex: Smallint; f: Single); stdcall;

Function GetCurrentEntityUserDataFloat(ByVal iIndex As Integer) As Single
Sub SetCurrentEntityUserDataFloat(ByVal iIndex As Integer, ByVal f As Single)

iIndex - the index number within the current entity where the chunk should be stored.
d - value attached to the entity

VCAddCurrentEntityUserDataChunk, VCAddCurrentEntityUserDataByte, VCAddCurrentEntityUserDataDouble, VCAddCurrentEntityUserDataFloat, VCAddCurrentEntityUserDataLong, VCAddCurrentEntityUserDataShort, VCGetUserDataName, VCGetCurrentEntityUID, VCGetCurrentEntityUserDataByte, VCGetCurrentEntityUserDataChunk, VCGetCurrentEntityUserDataCount, VCGetCurrentEntityUserDataDouble, VCGetCurrentEntityUserDataKind, VCGetCurrentEntityUserDataLong, VCGetCurrentEntityUserDataShort, VCGetCurrentEntityUserDataString, VCGetCurEntUserDataChunkSize, VCSetEntityUserData, VCSetHeaderUserData