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case BM_SETSTATE:
if( (UINT)m_bIsPressed != wParam )
{
m_bIsPressed = ( wParam == TRUE );
break;
}
return CButton::DefWindowProc(message, wParam, lParam);
LRESULT lResult = CButton::DefWindowProc(message, wParam, lParam);
Draw();//自己的绘制函数
return lResult;
UINT nBS;
nBS = GetButtonStyle();
SetButtonStyle(nBS | BS_OWNERDRAW);