The STRING_CONTAINER structure contains a string.<10>

 typedef struct _STRING_CONTAINER {
   DWORD cbBuf;
   [size_is(cbBuf/2), unique] WCHAR* pszString;

cbBuf: This member MUST specify the size, in bytes, of the buffer that is pointed to by the pszString member. The value of this number MUST be an even number.

pszString: This member MUST be a non-NULL pointer to a string. The string that is referenced by this member MUST NOT be empty.