To compare 2 revision of a file: 0. Make sure taht you have a visual Diff tool configured (see http://www.cvs-ext.com/#tools) 1. Show the properties dialog (Alt+Return) 2. Select the History page. In the list view you will see the commit dates of all revisions. 3. Select 2 revisions that you want to compare (see http://www.cvs-ext.com/#history) 4. Click Compare
To view changes between 2 dates of a directory: 1. Activate the output console (see http://www.cvs-ext.com/#console) 2. Select the directoy in Explorer 3. Select "CVS/Custom Command..." from the context menu 4. Enter the command "$(CVS) diff -D 2003-01-01 -D 2004-01-01 $(Names)" (replace the 2 dates) and click OK. The differences will appear in the console window
However, if there are many differences in many files, it is probably better to export both versions to different directories and compare the directories using a visual diff program such as WinDiff or WinMerge.