Originally posted by zyj8119 at 2011-06-04 15:01:01:
怎么声明？？

class CGPACalculatorDlg : public CDialog
{
...
private:
    HBRUSH OnCtlColor(CDC *pDC,CWnd *pWnd,UINT nCtlColor);
}

case IDC_EDIT_O8:
                pDC->SetBkColor(RGB(255,255,255));
                pDC->SetTextColor(RGB(0,0,255));
                break;
        case IDC_LIST_SCORE:
                pDC->SetBkColor(RGB(255,255,255));
                pDC->SetTextColor(RGB(0,0,255));
                break;

Originally posted by sudo at 2011-06-04 13:59:01:
只帮你检查语法错误了：

1. HBRUSH CGPACalculatorDlg::OnCtlColor(CDC *pDC,CWnd *pWnd,UINT nCtlColor)需要在GPACalculatorDlg.h里面的类里面“声明”一下

2. 在CGPACalculatorDlg::OnCtlColor(CDC *pDC, ...