When your application iterates through a dataset or performs a search, you should temporarily prevent refreshing of the values displayed in data-aware controls each time the current record changes. Preventing refreshing of values speeds the iteration or search and prevents annoying screen-flicker. 

DisableControls is a dataset method that disables display for all data-aware controls linked to a dataset. As soon as the iteration or search is over, your application should immediately call the dataset's EnableControls method to re-enable display for the controls. 

CustTable.DisableControls;
try
CustTable.First; { Go to first record, which sets EOF False }
while not CustTable.EOF do { Cycle until EOF is True }
begin
{ Process each record here }
    .
    .
    .
CustTable.Next; { EOF False on success; EOF True when Next fails on last record }
end;
finally
CustTable.EnableControls;
end;

CustTable->DisableControls();
try
{
  // cycle through all records of the dataset
  for (CustTable->First(); !CustTable->EOF; CustTable->Next())
  {
  // Process each record here
  .
  .
  .
  }
}
__finally
{
  CustTable->EnableControls();
}