Assembly: mscorlib (in mscorlib.dll)
The method is useful for custom marshaling or when mixing managed and unmanaged code. Because this method allocates the unmanaged memory required for a string, always free the BSTR when finished by calling the ZeroFreeBSTR method.Notes to Callers
This method is supported only on computers running Windows 2000 Service Pack 3 or later.
requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.