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    <p>you should call the PrintWindow API:</p> <pre><code>void CScreenShotDlg::OnPaint() { // device context for painting CPaintDC dc(this); // Get the window handle of calculator application. HWND hWnd = ::FindWindow( 0, _T( "Calculator" )); // Take screenshot. PrintWindow( hWnd, dc.GetSafeHdc(), 0 ); } </code></pre> <p>see this question: <a href="https://stackoverflow.com/questions/2447172/getting-window-screenshot-windows-api">getting window screenshot windows API</a></p> <p>if you are not using MFC, here the pure PrintWindow signature:</p> <pre><code>BOOL PrintWindow( HWND hwnd, HDC hdcBlt, UINT nFlags ); </code></pre> <p>see MSDN for more details: <a href="http://msdn.microsoft.com/en-us/library/dd162869(v=vs.85).aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/dd162869(v=vs.85).aspx</a></p> <p>about how to save it as bitmap asMatteo said depends on the actual framework you are using...</p> <p><strong>EDIT:</strong></p> <p>here full example in raw C++</p> <pre><code>#define _WIN32_WINNT 0x0501 //xp #include &lt;windows.h&gt; int main() { RECT rc; HWND hwnd = FindWindow(TEXT("Notepad"), NULL); //the window can't be min if (hwnd == NULL) { cout &lt;&lt; "it can't find any 'note' window" &lt;&lt; endl; return 0; } GetClientRect(hwnd, &amp;rc); //create HDC hdcScreen = GetDC(NULL); HDC hdc = CreateCompatibleDC(hdcScreen); HBITMAP hbmp = CreateCompatibleBitmap(hdcScreen, rc.right - rc.left, rc.bottom - rc.top); SelectObject(hdc, hbmp); //Print to memory hdc PrintWindow(hwnd, hdc, PW_CLIENTONLY); //copy to clipboard OpenClipboard(NULL); EmptyClipboard(); SetClipboardData(CF_BITMAP, hbmp); CloseClipboard(); //release DeleteDC(hdc); DeleteObject(hbmp); ReleaseDC(NULL, hdcScreen); cout &lt;&lt; "success copy to clipboard, please paste it to the 'mspaint'" &lt;&lt; endl; return 0; } </code></pre>
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    1. POHow to get screenshot of a window as bitmap object in C++?
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    1. USCommunity
    1. USDavide Piras
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    1. POHow to get screenshot of a window as bitmap object in C++?
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    1. CO`CPaintDC` implies that he's using MFC...
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      1. USMatteo Italia
    2. CO@Davide: tks, but just can't find the description for the function PrintWindow in MSDN library (msdn.microsoft.com)
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      1. USjondinham
    3. CO@Davide: found the description for PrintWindow, but how to add MFC library to vc++ project?
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