how remove nodes with all its childs?

Hi,

I'm use a table for store my menu nodes :

MenuID-------MenuName------ParentID

1----------------name1------------0

2----------------name2------------0

3----------------name1-2----------2

4----------------name2-2----------3

5----------------name3------------2

 

I was showed this node with treeview, now i want remove node was selected and all its childs if exits. indeed,i don't know how i can get id of node's childs. my menu is n level.

I thought that I must use recursive function to find MenuIds, but I can't do it.

help me plz.

thanks