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str = pmain->list->Getcount();
PostMessage(pmain->GetSafeHwnd(), WM_THREADINFO, 0, (LPARAM)str.GetBuffer(str.GetLength()));
LRESULT CMFCtestDlg::OnThreadInfo(WPARAM wParam, LPARAM lParam)
{
CString str;
str.Format(_T("%s"), (LPCTSTR)lParam);//尝试过lParam,(LPTSTR)lParam 结果都是一样的。
}