hello
I want to show 3 first entries in main page. I think to must use this code: lastn="n" offset="m" and n is 3 and m is (blog entries total) - 3 for show 3 first entries. I know mt:BlogEntryCount give me blog entries total, but I don't know how can I use (blog entries total) - 3 for m!
thank for your attention ...

Also if there is a way for hidden name of a category from category list, my problem will be dissolve!
Just use . That gives you the first three (that is oldest three) entries. use sort-order="descend" if you want to show the three most recent entries. Offset is used to display the entries after the m entries. So if you have 10 entries and you want to show the entries numbers 4 to 10 you use : all entries but not the first three. To exclude a category from the list use .
And again, now with code...
Just use mt:Entries lastn="3" sortorder="ascend". That gives you the first three (that is oldest three) entries. use sort-order="descend" if you want to show the three most recent entries. Offset is used to display the entries after the m entries. So if you have 10 entries and you want to show the entries numbers 4 to 10 you use mt:Entries offset="3" sortorder="ascend": all entries but not the first three. To exclude a category from the list use mt:Entries lastn="3" sort_order="ascend" category="NOT name of hidden category".