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copied!<p>I'm trying to get thumbnail pictures of windows that are not visible.</p> <p>Here's the code I have so far</p> <pre><code>BOOL CALLBACK WindowProc(HWND hWnd, LPARAM lParam) { RECT WindRect; GetWindowRect(hWnd, &WindRect) CurrentScreenShot->Next = new ScreenShotList(); CurrentScreenShot = CurrentScreenShot->Next; HDC SourceDC = GetDC(hWnd); HDC TargetDC = CreateCompatibleDC(SourceDC); CurrentScreenShot->ScreenShot = CreateCompatibleBitmap(SourceDC, WindRect.right - WindRect.left, WindRect.bottom - WindRect.top); BitBlt(TargetDC, 0, 0, WindRect.right - WindRect.left, WindRect.bottom - WindRect.top, SourceDC, 0, 0, SRCCOPY); ReleaseDC(hWnd, SourceDC); g_iWindows++; return TRUE; } </code></pre> <p>For now, <code>WindowProc</code> is being called directly using <code>FindWindow</code> to get a handle, though, I eventually want to use <code>EnumWindows</code> to loop through all of the windows to get their thumbnails and store them in a linked list.</p> <pre><code>WindowProc(FindWindow(NULL, L"File Explorer"), 0); </code></pre> <p>This code is in a DLL, which is called from a C# Forms application. For now the C# application just takes the bitmap and saves it to a file.</p> <p>The problem is that unless I use <code>FindWindow</code> to get the visible window (which also happens to be the C# application), the picture ends up being a black box.</p> <p>Is it possible to get an picture of a background window?</p> <p><strong>EDIT</strong>: This is a Windows Mobile application</p>

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