[wrecked_]

http://wiki.amxmodx.org/Half-Life_1_...vents#VGUIMenu

Each predefined menu has a unique id. Hook this event and have it print a message containing the menu id. You can use this to get the different ids for whatever menu you need to block or hook.

Returning PLUGIN_HANDLED in the hook function will block whatever menu is being called. Be careful, blocking the team choosing menus can cause server crashes in some cases.

http://wiki.amxmodx.org/Half-Life_1_...vents#ShowMenu could also be useful depending on what you're doing.