Extracting range of data by prompting user for values

I have a large amount of data in a txt file that I have successfully imported to excel via visual basic. This is multiple columns and rows (Column A is phase, B is temperature, and C is result). How can I write a macro that prompts the user to enter the range of phase and temp they want to look at (ie: 2.35-4.75 for a the range of cells that cover from phase 2 at temp 35degC to phase 4 at temp 75 degrees) and have it extract that data to store separately/graph? So the user doesn't have to scroll through a huge amount of data to plot manually. Thank you!

Example of a smaller scal code:
Phase Temp Result
1 34 99
1 38 97
1 44 107
2 44 100
2 56 105
3 64 110
4 69 113
4 72 115

So for example have the user input a range of 1.44 to 3.64 and the macro will find the range of those cells and plot temp for result.
Thank you!

Morning TTC.....this is really an issue for the Excel Fora. You can do it through VB6, but you are asking for a Macro....

post like these gives me head akes