EQ2Interface - Maybe Dumb

This maybe a dumb question but how does a button with no onpress know what it does. Example

Code:

<Button Location="0,96" Name="TakeCoinButton" PackLocation="left,bottom" PackSize="fixed,fixed" ScrollExtent="82,30" Size="82,30" Style="/CommonElements.PushButton.data.style" Tooltip=":5f6b97aeb8e74752:This is the amount of coin you have waiting to be picked up." TooltipDisabled=":5f6b97aea5cb3782:There is no coin left in this lot to pick up.">:5f6b97aeee5f1583:Take Coin</Button>

That is the Take coin button in the Broker window there is no Onpress in it but it does work as intended?

Or even this one

Code:

<Page BackgroundOpacity="1.000" DragAccepts="icon" Location="1,89" Name="AutoInventory" RStyleDefault="/CommonElements.RoundedGrouper.data.rect" ScrollExtent="137,36" Size="137,36">

<Text AbsorbsInput="false" Font="/TextStyles.Normal.NormalStyle" Location="10,9" Name="AutoInventoryMsg" PackLocation="left,top" PackSize="absolute,fixed" ScrollExtent="118,20" Size="118,20" TextAlignment="Center" TextAlignmentVertical="Center" TextColor="#F0D080" Tooltip=":5f6b97ae960bd90b:Hold shift to create a new stack">:5f6b97aedcf855ff:Drop to add item</Text>

</Page>

That is a Autoinventory box for the Broker that does work as intended but if i add that to say the shared part of my bank i cant drop anything to it