This will disable the popup:
For Visual Studio 2008:
HKEY_CURRENT_USER \ Software \ Microsoft \ VisualStudio \ 8.0
DWORD DontShowMacrosBalloon = 6
For Visual Studio 2010 (by default, DWORD will not be there, use New | DWORD value to create it):
HKEY_CURRENT_USER \ Software \ Microsoft \ VisualStudio \ 10.0
DWORD DontShowMacrosBalloon = 6
Delete the same key to enable it again.
Chris
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