^{ISeries.BeginUpdate
ISeries}

<sup>procedure BeginUpdate;

Type Library
TeeChartx

Description
See also the EndUpdate method.</sup>

^{These methods can be used when adding or modifying many values at once at a source Series to recalculate the function just one time, when finished adding points.}

^{Example (assumes Series(2) to be a function Series (eg. average))}

^{Private Sub Command1_Click()}

^{Dim i As Integer}

^{'Set Function Period}

^{TChart1.Series(2).FunctionType.Period = 3}

^{'Begin Update}

^{TChart1.Series(2).FunctionType.BeginUpdate}

^{'Add Series points}

^{For i = 0 To 500}

^{TChart1.Series(0).AddXY TChart1.Series(0).Count, 500 * (Rnd * 1000), "", clTeeColor}

^{TChart1.Series(1).AddXY TChart1.Series(1).Count, 500 * (Rnd * 1000), "", clTeeColor}

^{Next i}

^{'End update and display function Series}

^{TChart1.Series(2).FunctionType.EndUpdate}

^{End Sub}