记一次程序bug引发的电脑异常

记一次程序bug引发的电脑异常

正确程序

#include <iostream>
#include <windows.h>
using namespace std;
int main()
{
    LPCSTR lpszDesktop = "H";
    HDESK hOld = GetThreadDesktop(GetCurrentThreadId());
    HDESK hdesk=CreateDesktopA(lpszDesktop,NULL,NULL,0,GENERIC_ALL, NULL);
    if ((NULL == hdesk))
    {
        MessageBox(NULL, "失败!", "测试", MB_OK | MB_ICONERROR);
        return 1;
    }
    SetThreadDesktop(hdesk);
    SwitchDesktop(hdesk);
    MessageBox(NULL, "成功!", "测试", MB_OK);
    SwitchDesktop(hOld);
    CloseDesktop(hdesk);
    return 0;
}

错误程序

#include <iostream>
#include <windows.h>
using namespace std;
int main()
{
    LPCSTR lpszDesktop = "H";
    //HDESK hOld = GetThreadDesktop(GetCurrentThreadId());
    HDESK hdesk=CreateDesktopA(lpszDesktop,NULL,NULL,0,GENERIC_ALL, NULL);
    if ((NULL == hdesk))
    {
        MessageBox(NULL, "失败!", "测试", MB_OK | MB_ICONERROR);
        return 1;
    }
    SetThreadDesktop(hdesk);
    SwitchDesktop(hdesk);
    MessageBox(NULL, "成功!", "测试", MB_OK);
    //SwitchDesktop(hOld);
    CloseDesktop(hdesk);
    return 0;
}

错误原因

没有保存原窗口句柄导致程序结束后无法调回原窗口。由于本程序未添加窗口功能，其结果为除鼠标图标外其他图标全部消失且无法使用，执行explorer.exe无效，尚未找到除按电源键强制关机外的其他解决办法。

又get到一种整疯舍友的新方法。