When I tried to set a breakpoint in the C++ source code, instead of getting a filled in circle on the line indicating that the breakpoint will be hit, an empty circle with a yellow triangle in the corner is displayed. We wrote some code to wrap these DLLs in C++, and I needed to debug into those wrappers.

At my day job, I’m developing C# software on 64-bit Windows 7 using Visual Studio 2008 and I have to use some 32-bit DLLs provided by a third party. 64-bit Windows has been around for a number of years, but there are a number of quirks that make it more difficult to work with than 32-bit Windows.