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BOOL COSDlg::OnInitDialog()
{
......
COSDlg::WM_USER_BROADCAST_COME=RegisterWindowMessage("COME");
COSDlg::WM_USER_BROADCAST_EXIT=RegisterWindowMessage("EXIT");
::SendMessage((HWND)HWND_BROADCAST,COSDlg::WM_USER_BROADCAST_COME,0,
(LPARAM)this->m_hWnd);
return TRUE; // 除非将焦点设置到控件,否则返回 TRUE
}