操作桌面 dc控制

来源：互联网发布：备案域名租用编辑：程序博客网时间：2024/05/16 02:35

::TextOut(::GetDC(0),0,0,"显示在屏幕左上角",16);
HWND hDesktop=HWND_DESKTOP;
HDC hDC = ::GetDC(hDesktop);
TextOut(hDC,10,10,"Hello",5);

CWnd *pDesktop=GetDesktopWindow();
CDC *pDC=pDesktop->GetWindowDC();

pDC->MoveTo(0, 0);
pDC->LineTo(100, 100);

pDesktop->ReleaseDC(pDC);‘

    static int a=0;
    a+=30;
    if(a>1000) a=0;
    HWND   hDesktop=HWND_DESKTOP;
    HDC   hDC   =       ::GetDC(hDesktop) ;
    ::SetBkMode(hDC,TRANSPARENT);
    ::SetTextColor(hDC,RGB(60,120,240));

    //::TextOut(hDC,a,10," ",1);
    CWnd   *wnd=GetDesktopWindow();
    wnd->SendMessage(WM_PAINT,(WPARAM)hDC,0);
    ::TextOut(hDC,30+a,10,"Hello",5);
    CView::OnTimer(nIDEvent);

//刷新desktop
      HWND   hDesktop;

      hDesktop   =   ::FindWindow("Progman",   "Program   Manager");
      hDesktop   =   ::FindWindowEx(hDesktop,   0,   "SHELLDLL_DefView",   "");
      hDesktop   =   ::FindWindowEx(hDesktop,   0,   "SysListView32",   "");

      ::InvalidateRect(hDesktop,NULL,true);
      ::SendMessage(hDesktop,WM_PAINT,0,0);