BoxWidthOffset: Double;
The BoxWidthOffset property determines callout length.
Executing the example requires an existing ws object of the IWxWorkspace type.
Sub UserProc;
Var
ws: IWxWorkspace;
DBArrow: IWxDoubleBoxArrow;
Begin
DBArrow := ws.Shapes.FindById("Shape 1") As IWxDoubleBoxArrow;
DBArrow.BoxHeightOffset := 8;
DBArrow.BoxWidthOffset := 20;
End Sub UserProc;
After executing the example the callout is resized.
See also: