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Needed: Current Line weight


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Current LineWeight is stored in celweight SysVar. -1 means "Bylayer"; -2 is "ByBlock; -3 is "Default".

But if you want the value of current LineWeigth try this

 (minusp (setq celw (getvar 'celweight)))
 (nth (+ 3 celw)
        (getvar 'lwdefault)
        (vla-get-Lineweight (vla-item (vla-get-Layers (vla-get-ActiveDocument (vlax-get-acad-object))) (getvar 'clayer)))

"Byblock" has no meaning until you use newly created object in a block and set Lweight for that block.

And keep in mind that the value returned is 100 times the real value (25 instead 0.25, for metric units)

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