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CButton* pBtn = (CButton*)GetDlgItem(IDC_***);//必须进行强制类型转换
HWND hBtn = pBtn->GetSafeHwnd();
CButton* pBtn = (CButton*)GetDlgItem(IDC_***);//必须进行强制类型转换
HWND hBtn = pBtn->GetSafeHwnd();