C++ appcrash USER32.dll

C++ appcrash USER32.dll

本文关键字：dll USER32 appcrash C++      更新时间：2023-10-16
  Problem Event Name: APPCRASH
  Application Name: program.exe
  Application Version: 0.0.0.0
  Application Timestamp: 537374b6
  Fault Module Name: USER32.dll
  Fault Module Version: 6.3.9600.16384
  Fault Module Timestamp: 52157ca5
  Exception Code: c0000005
  Exception Offset: 0000949d
  OS Version: 6.3.9600.2.0.0.256.48
  Locale ID: 1049
  Additional Information 1: 5861
  Additional Information 2: 5861822e1919d7c014bbb064c64908b2
  Additional Information 3: 3a20
  Additional Information 4: 3a20a93c34687143a5bf7d33f1cf3ccc

我试图使c++ winapi程序，其唯一的功能是绘制一个窗口的按钮，切换光标移动和点击，但在窗口显示后，应用程序崩溃之前能够做一些事情。在窗口过程中，我只有WM_COMMAND, WM_DESTROY和默认返回DefWindowProc()的情况。WinMain函数代码:

    WNDCLASSEX wcx;
    int X, Y;
    MSG msg;
    RECT srect;
    GetWindowRect(GetDesktopWindow(), &srect);
    X = srect.right;
    Y = srect.bottom;
    wcx.cbSize = sizeof(WNDCLASSEX);
    wcx.style = CS_HREDRAW | CS_VREDRAW | CS_DROPSHADOW;
    wcx.lpfnWndProc = MainProc;
    wcx.cbClsExtra = 0;
    wcx.cbWndExtra = 0;
    wcx.hInstance = hinst;
    wcx.hIcon = 0;
    wcx.hCursor = 0;
    wcx.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wcx.lpszMenuName = 0;
    wcx.lpszClassName = L"wcname";
    wcx.hIconSm = 0;
    if (!RegisterClassEx(&wcx)){
        MessageBox(0, L".", L"RegisterClass failed", 0);
        return 1;
    }
    hwnd = CreateWindowEx(
        0,
        L"wcname",
        L"off",
        WS_OVERLAPPEDWINDOW,
        X / 2 - 112,
        Y / 2 - 40,
        224,
        80,
        0,
        0,
        hinst,
        0
    );
    if (!hwnd){
        MessageBox(0, L".", L"CreateWindow failed", 0);
        return 1;
    }
    GetClientRect(hwnd, &srect);
    X = srect.right;
    Y = srect.bottom;
    btn = CreateWindowEx(
        0,
        L"button",
        L"Turn on",
        WS_VISIBLE | WS_CHILD | BS_PUSHBUTTON,
        0, 0,
        X, Y,
        hwnd,
        (HMENU)BTN,
        hinst,
        0
    );
    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);
    while (GetMessage(0, hwnd, 0, 0)){
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return 0;

hwnd为全局变量，BTN和MAIN为宏。

GetMessage的lpMsg参数不允许为NULL(0)。

这叫:

while (GetMessage(0, hwnd, 0, 0))

必须是:

while (GetMessage(&msg, hwnd, 0, 0))
相关文章：