如标题所示,我现在的处理是
void CpictureCTL_test01Dlg::OnPaint()
{
CWnd* pWnd1;
pWnd1 = GetDlgItem(IDC_LED);
CPaintDC dc(pWnd1); // 用于绘制的设备上下文 CPaintDC
dc.SetBkColor(RGB(0,0,0)); //picture背景色成黑色
CBrush brush(RGB(0,125,0));//画刷
CMyMemDC dcMem(&dc);
dcMem.SelectObject(&brush);
if(dd == 1)
DrawLine(dcMem);
else
DrawRect(dcMem);
现在的结果是整个窗口都变成了黑色