VC对话框禁止关闭按钮和禁止任务管理中关闭进程

1.BOOL C***Dlg::OnInitDialog()

{

//禁止关闭对话框
CMenu* pMenu = this->GetSystemMenu(FALSE);
pMenu->ModifyMenu(SC_CLOSE,MF_BYCOMMAND | MF_GRAYED );
//禁止在任务管理器中关闭进程
SetTimer(1,m_nTimer,NULL);//设置1号定时器，循环调用stopKillProcess()函数，禁止任务管理器中关闭进程

}

2.void CClientTracerDlg::stopKillProcess()//禁止任务管理器中关闭进程
{
HWNDhwnd;
intiItem=0;
LVITEMlvitem, *plvitem;
charItemBuf[512],*pItem;
DWORDPID;
HANDLEhProcess;

// 查找任务管理器ListView窗口句柄
hwnd=::FindWindow("#32770",_T("Windows 任务管理器"));
hwnd=::FindWindowEx(hwnd,0,"#32770",0);
hwnd=::FindWindowEx(hwnd,0,"SysListView32",0);

// Windows任务管理器尚未启动则返回
if (!hwnd)
return;
else
{
// 没有指定目标进程则返回
iItem=::SendMessage(hwnd,LVM_GETNEXTITEM,-1,LVNI_SELECTED);
if (iItem==-1)
return;
else
{
// 获取进程句柄操作失败则返回
GetWindowThreadProcessId(hwnd, &PID);
hProcess=OpenProcess(PROCESS_ALL_ACCESS,false,PID);
if (!hProcess)
return;
else
{
plvitem=(LVITEM*)VirtualAllocEx(hProcess, NULL, sizeof(LVITEM), MEM_COMMIT, PAGE_READWRITE);
pItem=(char*)VirtualAllocEx(hProcess, NULL, 512, MEM_COMMIT, PAGE_READWRITE);

// 无法分配内存则返回
if ((!plvitem)||(!pItem))
return;
else
{
lvitem.cchTextMax=512;
lvitem.iSubItem=0; //ProcessName
lvitem.pszText=pItem;
WriteProcessMemory(hProcess, plvitem, &lvitem, sizeof(LVITEM), NULL);
::SendMessage(hwnd, LVM_GETITEMTEXT, (WPARAM)iItem, (LPARAM)plvitem);
ReadProcessMemory(hProcess, pItem, ItemBuf, 512, NULL);

// 比较字符串,匹配进程映像名
CString str = (CString)ItemBuf;
if(str.CompareNoCase(_T("ClientTracer.exe")) == 0)
{
HWND hWnd=::FindWindow(NULL,_T("Windows 任务管理器"));
::SendMessage(hWnd,WM_DESTROY,0,0);
Sleep(100);
::MessageBox(NULL,_T("禁止关闭系统关键进程!"),_T("提示"),MB_ICONERROR | MB_OK);
}
}
}
}
}

//释放内存
CloseHandle(hwnd);
CloseHandle(hProcess);
VirtualFreeEx(hProcess, plvitem, 0, MEM_RELEASE);
VirtualFreeEx(hProcess, pItem, 0, MEM_RELEASE);
}

3.定时器设置调用stopKillProcess()，也可以多线程调用stopKillProcess()

void C***Dlg::OnTimer(UINT nIDEvent)
{
// TODO: Add your message handler code here and/or call default
if(nIDEvent == 1)
{
stopKillProcess();
}
CDialog::OnTimer(nIDEvent);
}