@BerndSchwarzenbacher . I tried it . I think it works quite well . Thank you so much !

Thank you 

Topic : I want to set information into the building material parameter but can't. Can you help me ? I used the code below to create the building material API_Attribute fill_atr; API_AttributeDef fill_atrdef; API_FillLine *fillLine; API_Polygon *poly;...