When the trigger processing procedure for a focus trigger accesses a table buffer, the table buffer is automatically attached to the form that’s active when the trigger is activated. The table buffer remains active as long as the form remains open. The next time any focus triggers for the form are activated, they can access the contents of the table buffer. It will be in the state it was left by the last trigger processing procedure that accessed it.
Be aware that other integrating applications can instantiate table buffers as well. There is a possibility of multiple developers trying to use the same table buffer, especially when trigger processing procedures reference a Microsoft Dynamics GP table. Thus, it’s a good idea to “clean up” any table buffers your trigger processing procedures access, and not to expect a table buffer to be in a known state when a trigger processing procedure accesses it.