I have some code I have written in VBA that is using a Do While loop.
The code works fine, however, it is very slow. I am fairly new to Excel
programming and have a very limited knowledge of the available
functionality in the VBA language. So I was wondering if someone might
help me optimize my loop or possibly remove it completely. It seems to
me that there should be some command I don't know about that would
really help me out. Maybe a sort or find or putting results in a
collection or something, I just don't know.

My code basically compares the value of the (intField) column to a
string (Str) for every row from the first to last (both ints) row. If
the value of the (intField) column is not equal to Str then the row is
deleted and the remaining rows are shifted up. Here is my code.

i = first
last = last + 1
Do While i < last
If Not Trim(ws.Cells(i, intField).Value) = Str Then
ws.Rows(i).Delete Shift:=xlShiftUp
' need to recheck same row b/c of shift and there is one less
row
i = i - 1
last = last - 1
End If
i = i + 1
Loop

Thanks for any help in advance. If you need any other info, just ask.