typedef void __fastcall (__closure *TGetEditEvent)(System::TObject* Sender, int ACol, int ARow, System::UnicodeString &Value);
TGetEditEvent is the type of the event handlers that provide strings for the inplace editor of a grid.
Sender is the grid whose cell is being edited.
ACol and ARow indicate the column and row indexes of the cell that is being edited.
Value is the string requested by the inplace editor for that cell. The event handler supplies this string.