CONTAINING_RECORD宏
//根据结构中某成员的地址得到整个结构的地址
struct msginfo
{
INT a;
char b[20] = {"abc"};
};
void CtestThreadDlg::OnBnClickedButton18()
{
msginfo info = {};
info.a = 12;
msginfo * p = CONTAINING_RECORD(info.b, msginfo, b);
int d = p->a;
}
VS2015编译运行