With this macro and dll you should be able to jump from one place in one tool to the same place in the other tool and also be able to see and toggle breakpoints directly from SlickEdit.
Two files are needed to be copied into SlickEdit\win folder: AddVSExternalTool.exe and SEtoVS.dll and one into config folder: VC++Sync.e (all these 3 files are in the files.zip attachment, and sources into src.zip). Then load VC++Sync.e into SlickEdit and follow the on-screen instructions. More description is into the attached doscument.