Delegate CellAreaClassData.GetPreferredWidthForHeightCallback
public delegate void CellAreaClassData.GetPreferredWidthForHeightCallback(IntPtr area, IntPtr context, IntPtr widget, int height, out int minimumWidth, out int naturalWidth)
public delegate void CellAreaClassData.GetPreferredWidthForHeightCallback(IntPtr area, IntPtr context, IntPtr widget, int height, out int minimumWidth, out int naturalWidth)