new to VBA help comparing two sheets

[mlttkw]

I know very little VBA (very adept in SQL) and I am hoping someone could assist me so I can learn from this initial effort.
I want to compare two spreadsheets with the same column order and naming convention. However, I want to highlight the differences in the base spreadsheet (Sheet1) that only has a subset of data of the other sheet (Sheet2). There is a primary key (Column A) in both spreadsheets.
Desired workflow:
IF Colum A id Sheet 1 is in Column A Sheet2, then compare each adjacent column for differences.


Example: If Sheet1!Column A1 id = Sheet2!A9 id, then compare Sheet1!B1 to Sheet2!B9, so and so on.
Highlight the differences on Sheet1
Also, I have some disparate values for some columns that should be treated as matches.
For Example column C in both Sheets need to be equal when the following occurs
Sheet1!column C value is “NEW” and Sheet2!columnC value is “Pipeline” they should be a match
Any help with this is greatly appreciated and will serve as a basis for me in the future.