How to merge cells in Word document by VBA code??

Hi,
I am writing a word document from Excel by VBA code, and in the word document there is a table with two rows.

In the first table row, there are four cells, in the second row there are five cells (after merging cell(1,1) and cell(1,2)). Now I want to merge cell(1,4) and cell(2,5) into one. To do this I suppose I have to select or activate the cells first(maybe not?), but how to?

I am trying to somehow define a range of cells, but have not succeeded yet..

This (bold text) seems not to be the correct syntax ??

Set myTable = wordApp.ActiveDocument.Tables.Add(Range:=wordApp.Selection.Range, NumRows:=2, _
            NumColumns:=5, DefaultTableBehavior:=wdWord9TableBehavior)
....
...merging cell(2,1) and cell(2,2) and writing to cells..
....
myTable.Range(myTable.cell(1, 4), myTable.cell(2, 5)).Select
Selection.Cells.Merge

Someone have a clue??

Best Regards
Siri