Copies the contents of a managed System.Security.SecureString object to a block of memory allocated from the unmanaged COM task allocator.
The address, in unmanaged memory, where the s parameter was copied to, or 0 if a null object was supplied.
The Marshal.SecureStringToCoTaskMemAnsi(System.Security.SecureString) 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 memory by calling Marshal.ZeroFreeCoTaskMemAnsi(IntPtr). The characters of the string are copied as ANSI characters.