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POUndefined reference to WinMain@16 in C++
 

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  1. POUndefined reference to WinMain@16 in C++
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    <p>i was taking the MSDN lesson for programming windows with C++ so i tried their code:</p> <pre><code>#ifndef UNICODE #define UNICODE #endif #include &lt;windows.h&gt; LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam); int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE, PWSTR pCmdLine, int nCmdShow) { // Register the window class. const wchar_t CLASS_NAME[] = L"Sample Window Class"; WNDCLASS wc = { }; wc.lpfnWndProc = WindowProc; wc.hInstance = hInstance; wc.lpszClassName = CLASS_NAME; RegisterClass(&amp;wc); // Create the window. HWND hwnd = CreateWindowEx( 0, // Optional window styles. CLASS_NAME, // Window class L"Learn to Program Windows", // Window text WS_OVERLAPPEDWINDOW, // Window style // Size and position CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, // Parent window NULL, // Menu hInstance, // Instance handle NULL // Additional application data ); if (hwnd == NULL) { return 0; } ShowWindow(hwnd, nCmdShow); // Run the message loop. MSG msg = { }; while (GetMessage(&amp;msg, NULL, 0, 0)) { TranslateMessage(&amp;msg); DispatchMessage(&amp;msg); } return 0; } LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { switch (uMsg) { case WM_DESTROY: PostQuitMessage(0); return 0; case WM_PAINT: { PAINTSTRUCT ps; HDC hdc = BeginPaint(hwnd, &amp;ps); FillRect(hdc, &amp;ps.rcPaint, (HBRUSH) (COLOR_WINDOW+1)); EndPaint(hwnd, &amp;ps); } return 0; } return DefWindowProc(hwnd, uMsg, wParam, lParam); </code></pre> <p>}</p> <p>as i was compiling it as:</p> <pre><code>g++ -c app.cpp -s app.o g++ -o app.exe app.o -s -Wl,--subsystem,windows </code></pre> <p>then i get the error:</p> <pre><code> undefined reference to WinMain@16 </code></pre> <p>what's lacking?</p>
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    1. USMaurice Rodriguez
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      1. POUndefined reference to WinMain@16 in C++
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      1. VTDownMod
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    1. COPerhaps try renaming `wWinMain` into `WinMain`?
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      1. POUndefined reference to WinMain@16 in C++
      1. USAndy Prowl
    2. COYou can still use `GetCommandLineW` to get the command line as a wide string.
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      1. POUndefined reference to WinMain@16 in C++
      1. USchris
    3. CO@HansPassant The error still occurs even though i changed it to WinMain and the argument to PSTR, if the Writer of the tutorial wrote it there, it means that the code once ran, so there must be a way to make it work.
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      1. POUndefined reference to WinMain@16 in C++
      1. USMaurice Rodriguez
 

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