struct Win
{
/* members supposed to be used ONLY INTERNALLY */
struct Win * _prev; /* chain pointers; if 0, they mark the start or end */
struct Win * _next; /* of the chain; if both are 0, Win is outside chain */
struct Win
{
/* members supposed to be used ONLY INTERNALLY */
struct Win * _prev; /* chain pointers; if 0, they mark the start or end */
struct Win * _next; /* of the chain; if both are 0, Win is outside chain */