Actuate Question:

It is for right to left. Reverse logic has to implement for
left to right
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First Define one gobal variable(g_rw_wdth) as double,
Static, publice.

And now assume that in a frame you have got two dynamic
text.

Now in 1st text box onRow method write following code:
g_rw_wdth = 0
IF ISNULL(row.getvalue("field1")) then
g_rw_wdth = g_rw_wdth + (me.size.width/1440)
end if

Now in 2ndtext box onRow method write following code:
IF ISNULL(row.getvalue("field2")) then
g_rw_wdth = g_rw_wdth + (me.size.width/1440)
else
Me.Position.X = Me.Position.X - (g_rw_wdth * OneInch)
end if
In these fashion you can have more dynamic text.

Now if 1st text box the value is null automatically the 2nd
text box will shift to place 1st text box.

And so on.