[SOLVED:Excel] Selecting non-adjacent cells with Union

I need to make multiple selections of non-adjacent cells in Excel:

Union(Range(Cells(7, 2), Cells(17, 2)), Range(Cells(7, 4), Cells(17, 4))).Select

What makes my problem tricky is that the number of ranges I need to pass through the union method varies depending on other information in the file determined at runtime. Sometimes I will select 2 ranges, other times 3 ranges, etc. I tried to put the ranges in a string variable:

InStr="Range(Cells(7, 2), Cells(17, 2)), Range(Cells(7, 4), Cells(17, 4))"
Union(InStr).Select

But it appears that you can only pass range type variables through the union method. Does anyone have any idea on how I can program this without using brute force? I don't have to use union, I just use this since this is what I know to use for non-adjacent selections.

Thanks in advance!

I figured it out! I create two range variables. Then in a for or while loop I put each new range I want to eventually select in one of the range variables. Then as I find more and more ranges that I eventually want to select, I put the new range in one of the range variables and then I use the union method to do the union of what is in the main range variable with the new range that was just found.