fpSpread1.ActiveSheet.ColumnHeader.RowCount = 4;
fpSpread1.ActiveSheet.ColumnHeader.SetClip(0, 0, 2, 4, "one\ttwo\tthree\tfour\r\nfive\tsix\tseven\teight");
string s;
s = fpSpread1.ActiveSheet.ColumnHeader.GetClip(0, 0, 2, 4);
listBox1.Items.Add(s);
fpSpread1.ActiveSheet.ColumnHeader.RowCount = 4
fpSpread1.ActiveSheet.ColumnHeader.SetClip(0, 0, 2, 4, "one" + Chr(9) + "two" + Chr(9) + "three" + Chr(9) + "four" + vbCrLf
+ "five" + Chr(9) + "six" + Chr(9) + "seven" + Chr(9) + "eight")
Dim s As String
s = fpSpread1.ActiveSheet.ColumnHeader.GetClip(0, 0, 2, 4)
ListBox1.Items.Add(s)