Address of the buffer for storing state information.
The number of additional DWORDs of information that are stored in the optional parameters.
[in] optional parameters
Additional data pushed down by the setjmp intrinsic. The first DWORD is a function pointer that is used to unwind extra data and return to a nonvolatile register state. The second DWORD is the try level to be restored. Any further data is saved in the generic data array in the jmp_buf.