I need learn to use the macro section

[alvis500]

Hi guys, Sorry for my bad english first and i need help whit the section of macros

i'm know the basic thinks of programing but i not understand the lenguaje of the macros
i'm not have idea how make a condition like
[table=95][tr][td]
if (cap <= X ) then
{
go.tolabel(exit)
}
[/td][td][/td][/tr][tr][td][/td][td][/td][/tr][/table]
i try make one macro equal to this and not work.
please give me some help link to one good tutorial or somethink like that

I understand the English but I find it hard to explain something