DMenu

 
local DermaPanel = vgui.Create( "DFrame" )
DermaPanel:SetPos( 50,50 )
DermaPanel:SetSize( 200, 250 )
DermaPanel:SetTitle( "Testing Derma Stuff" )
DermaPanel:SetVisible( true )
DermaPanel:SetDraggable( true )
DermaPanel:ShowCloseButton( true )
DermaPanel:MakePopup()
 
local MenuButton = vgui.Create("DButton")
MenuButton:SetParent( DermaPanel )
MenuButton:SetText( "Menu >" )
MenuButton:SetPos(25, 50)
MenuButton:SetSize( 150, 175 )
MenuButton.DoClick = function ( btn )
    local MenuButtonOptions = DermaMenu() -- Creates the menu
    MenuButtonOptions:AddOption("hello", function() Msg("Hello") end ) -- Add options to the menu
    MenuButtonOptions:AddOption("how", function() Msg("How") end )
    MenuButtonOptions:AddOption("are", function() Msg("Are") end )
    MenuButtonOptions:AddOption("you", function() Msg("You") end )
    MenuButtonOptions:AddOption("?", function() Msg("?") end )
    MenuButtonOptions:Open() -- Open the menu AFTER adding your options
end