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typedef struct
{
    long left;
    long top;
    long right;
    long bottom;
} BIGRECT;

MEXPORT_SYMSOUT void CopyBigRect(BIGRECT *ans, BIGRECT *r);
MEXPORT_SYMSOUT void SetBigRect(BIGRECT *ans, long left, long top, long right, long bottom);
MEXPORT_SYMSOUT int UnionBigRect(BIGRECT *ans, const BIGRECT *r, const BIGRECT *s);
MEXPORT_SYMSOUT void SetBigRectEmpty( BIGRECT *r);