PInvokeStackImbalance C# call to unmanaged C++ function

After switching to VS2010, the managed debug assistant is displaying an error about an unbalanced stack from a call to an unmanaged C++ function from a C# application.
The VS2008 built C++ dll and C# application never had a problem.

Decision:

1. Use __stdcall on your C++ function
Examble:

short __stdcall SuperSpecialOpenFileFunc(SuperSpecialStruct * stuff);

2. Declare CallingConvention = CallingConvention.Cdecl on your DllImport
3. Use a compiler switch that will turn on stdcall as the default calling convention: -Gz

About pInvokeStackImbalance MDA:
http://msdn.microsoft.com/en-us/library/0htdy0k3.aspx