Control Initialization
Each subform ultimately resides on a parent power form. When the power form initializes, all of its subforms (including the child subforms of its subforms) are initialized. First, runtime initializes these objects in order:
Business view columns (BC).
Subform controls.
Static text.
Helps.
Event rules (ER) structures.
Runtime begins detail data selection and sequencing if the grid option Automatically Find On Entry is enabled.