Automated updating of API pages at this location, to reflect patch changes, has ceased from 10.1.7 onwards.

Drops or picks up an item from the cursor to the Send Mail tab.

ClickSendMailItemButton(itemIndex [, clearItem])

Arguments

itemIndex

number - The index of the item (1-ATTACHMENTS_MAX_SEND(12))

clearItem

boolean? - Clear the item already in this slot. (Done by right clicking an item)