title: How to create a progress bar while downloading a file using the windows API?
body: <p>i'm working on an application in MS Visual C++ using Windows API that must download a file and place it in a folder.</p>
  
  <p>I have already implemented the download using URLDownloadToFile function, but i want to create a PROGRESS_CLASS progress bar with marquee style while the file is being downloaded, but it doesn't seems to get animated in the process.</p>
  
  <p>This is the function I use for downloading:</p>
  
  <pre><code>BOOL SOXDownload()
  {   
      HRESULT hRez = URLDownloadToFile(NULL,
          "url","C:\\sox.zip", 0, NULL);
      if (hRez == E_OUTOFMEMORY ) {
          MessageBox(hWnd, "Out of memory Error","", MB_OK);
          return FALSE;
      }
      if (hRez != S_OK) {
          MessageBox(hWnd, "Error downloading sox.", "Error!", MB_ICONERROR | MB_SYSTEMMODAL);
          return FALSE;
      }
      if (hRez == S_OK) {
          BSTR file = SysAllocString(L"C:\\sox.zip");
          BSTR folder = SysAllocString(L"C:\\");
          Unzip2Folder(file, folder);
          ::MessageBoxA(hWnd, "Sox Binaries downloaded succesfully", "Success", MB_OK);
      }
      return TRUE;
  }
  </code></pre>
  
  <p>Later I call inside WM_CREATE (in my main window's message processor):</p>
  
  <pre><code>if (!fileExists("C:\\SOX\\SOX.exe")) {
      components[7] = CreateWindowEx(0, PROGRESS_CLASS,
                                  NULL, WS_VISIBLE | PBS_MARQUEE,
                                  GetSystemMetrics(SM_CXSCREEN) / 2 - 80,
                                  GetSystemMetrics(SM_CYSCREEN) / 2 + 25,
                                  200, 50, hWnd, NULL, NULL, NULL);
      SetWindowText(components[7], "Downloading SoX");
      SendMessage(components[7], PBM_SETRANGE, 0, (LPARAM) MAKELPARAM(0, 50));
      SendMessage(components[7], PBM_SETMARQUEE, TRUE, MAKELPARAM( 0, 50));
      SOXDownload();
      SendMessage(components[7], WM_CLOSE, NULL, NULL);
  }
  </code></pre>
  
  <p>And as I want, I get a tiny progress bar... But it's not animated, and when I place the cursor over the bar, the cursor indicates that the program is busy downloading the file.</p>
  
  <p>When the download is complete, the window closes as i requested: <code>SendMessage(components[7], WM_CLOSE, NULL, NULL);</code></p>
  
  <p>So the question is how can I make the bar move while downloading the file? Considering that i want it done with marquee style for simplicity.</p>
  
  <p>Thanks in advance.</p>