TVirtualTreeColumns.AdjustAutoSize Method

Called when columns must be sized so that the fit the client area.

procedure AdjustAutoSize(CurrentIndex: TColumnIndex; Force: Boolean = False);

Called only if the header is in auto-size mode which means a column needs to be so large that it fills all the horizontal space not occupied by the other columns. CurrentIndex (if not InvalidColumn) describes which column has just been resized.

TVirtualTreeColumns Class