Hello Sea.Heaven.
Thank you very much for your help.
I've been allready solved the whole problem.
First,
Using delphi i made a code auto - constructing 99 .lin arcives containing (each one) 100 Line Type definitions.
For example 56.lin contains
*H_5600 ....
*H_5601 ....
....................
*H_5699 ....
Those 99 goups of 100 LT definitions support all earth heights
manually i inserted the 99 .lin LT groups to 99 .dwg .
I did it manually because -Linetype unfortunatelly has problems.
OK, i did it.
When i need a height LT (for example 1245) , if no H_1245 is member of Doc Linetypes , my pascal code inserts the 12.dwg in my document as exploded and purged block.
After insert, my document has 100+ line LT (H_1201,H_1202...H1255).
After using some of them ( 1245,1246...) , purgeAll will hold only the used ones and noone block added.
That's a good solution.
About polylines, the isometric and isobath lines are smooth lines and splineis the type of line representing the drwing.
But the real solution is THE AUTOCAD SUPPORT ADDING LT USING STRING.
You are a very clever person and you undestand what i say.
And sure i believe that in the future will be an update.
And the same will occure about the badly designed -LineType.
AUTODESK made a so brilliant software, the top drawing software.
But after Autocad 14 wich was fully functional and an earhquake in CAD environment, the folowing updates were (it's my opinion) in a wrong direction. If Autocad 14 sould work ob 32 bit platforms, i sould work with it until i die.
Thank you very much sea.heaven.
Regards,
Gery.
I send you screenshots



