Delegate CellAreaClassData.GetPreferredHeightForWidthCallback
public delegate void CellAreaClassData.GetPreferredHeightForWidthCallback(IntPtr area, IntPtr context, IntPtr widget, int width, out int minimumHeight, out int naturalHeight)
public delegate void CellAreaClassData.GetPreferredHeightForWidthCallback(IntPtr area, IntPtr context, IntPtr widget, int width, out int minimumHeight, out int naturalHeight)