[Lazarus] lNet and several threads

[User]

I need something like this 
http://www.delphidabbler.com/img/articles/16-3.gif

example "Drawing rows in alternating colors"

http://www.delphidabbler.com/articles?article=16&part=1#eg2

i tried code in Listing 4 but did not work... How do I do that in 
Lazarus ??

JB



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