C / C++ / MFC

BOOL CTestDlg::OnInitDialog()
{
	CDialog::OnInitDialog();
	......

	// TODO: Add extra initialization here
	// Set the ListCtrl style
	LONG lStyle = m_ListCtrl.SendMessage(LVM_GETEXTENDEDLISTVIEWSTYLE);
	lStyle |=  LVS_EX_FULLROWSELECT | LVS_EX_GRIDLINES;
	m_ListCtrl.SendMessage(LVM_SETEXTENDEDLISTVIEWSTYLE, 0,(LPARAM)lStyle);


	// Add ListCtrl titles
	m_ListCtrl.InsertColumn(0,"Name",NULL,100, -1);
	m_ListCtrl.InsertColumn(1,"PID",NULL,60,-1);
	m_ListCtrl.InsertColumn(2,"User",NULL,120,-1);
	m_ListCtrl.InsertColumn(3,"CPU",NULL,60,-1);
	return TRUE;  // return TRUE  unless you set the focus to a control
}
void CTestDlg::OnBtnRead() 
{
	// TODO: Add your control notification handler code here
	m_ListCtrl.DeleteAllItems();


	// Find window handle
	HWND	hWnd,hListview;
	hWnd=::FindWindow(NULL,_T("Windows Task Manager"));   
	hWnd=::FindWindowEx(hWnd,0,"#32770",0);   
	hListview=::FindWindowEx(hWnd,0,_T("SysListView32"),NULL);
	if(!hListview)
	{
		MessageBox("Listview handle is NULL ！");
		return;
	}

	int count = (int)::SendMessage(hListview,LVM_GETITEMCOUNT,0,0);
	int i,nItem;


	// Get the ListView lines.
	CString strTemp;
	strTemp.Format("Total process :%d",count);
	MessageBox(strTemp);
	
	CString str1="";
	CString str2="";
	CString str3="";
	CString str4="";

	DWORD	pid;
	HANDLE	process;
	LVITEM	lvi, *_lvi;
	char	firstitem[512], secitem[512],thirditem[512],fourthitem[512];
	char	*_firstitem, *_secitem,*_thirditem,*_fourthitem;

	memset(firstitem,0,512);
	memset(secitem,0,512);
	memset(thirditem,0,512);
	memset(fourthitem,0,512);


	// Get process pid.
	GetWindowThreadProcessId(hListview, &pid);
	process=OpenProcess(PROCESS_VM_OPERATION|PROCESS_VM_READ|
		PROCESS_VM_WRITE|PROCESS_QUERY_INFORMATION, FALSE, pid);
	
	_lvi=(LVITEM*)VirtualAllocEx(process, NULL, sizeof(LVITEM),MEM_COMMIT, PAGE_READWRITE);
	_firstitem=(char*)VirtualAllocEx(process, NULL, 512, MEM_COMMIT,PAGE_READWRITE);
	_secitem  =(char*)VirtualAllocEx(process, NULL, 512, MEM_COMMIT,PAGE_READWRITE);
	_thirditem=(char*)VirtualAllocEx(process, NULL, 512, MEM_COMMIT,PAGE_READWRITE);
	_fourthitem=(char*)VirtualAllocEx(process,NULL, 512, MEM_COMMIT,PAGE_READWRITE);
 	lvi.cchTextMax=512;


	// Here use degression , order with the task manager
	for(i=count; i>=0; i--)
	{
		// Read first item data
		lvi.iSubItem=0;
		lvi.pszText=_firstitem;
		WriteProcessMemory(process, _lvi, &lvi, sizeof(LVITEM), NULL);
		::SendMessage(hListview, LVM_GETITEMTEXT, (WPARAM)i, (LPARAM)_lvi);


		// Read second item data
		lvi.iSubItem=1;
		lvi.pszText=_secitem;
		WriteProcessMemory(process, _lvi, &lvi, sizeof(LVITEM), NULL);
		::SendMessage(hListview, LVM_GETITEMTEXT, (WPARAM)i, (LPARAM)_lvi);


		// Read 3rd item data
		lvi.iSubItem=2;
		lvi.pszText=_thirditem;
		WriteProcessMemory(process, _lvi, &lvi, sizeof(LVITEM), NULL);
		::SendMessage(hListview, LVM_GETITEMTEXT, (WPARAM)i, (LPARAM)_lvi);


		// Read fourth item data
		lvi.iSubItem=3;
		lvi.pszText=_fourthitem;
		WriteProcessMemory(process, _lvi, &lvi, sizeof(LVITEM), NULL);
		::SendMessage(hListview, LVM_GETITEMTEXT, (WPARAM)i, (LPARAM)_lvi);


		// Read the process memory.
		ReadProcessMemory(process, _firstitem,	firstitem,	512, NULL);
		ReadProcessMemory(process, _secitem,	secitem,	512, NULL);
		ReadProcessMemory(process, _thirditem,	thirditem,	512, NULL);
		ReadProcessMemory(process, _fourthitem,	fourthitem,	512, NULL);


		// Format strings.
		str1.Format("%s",firstitem);
		str2.Format("%s",secitem);
		str3.Format("%s",thirditem);
		str4.Format("%s",fourthitem);


		// Add it into my ListCtrl.
		nItem = m_ListCtrl.InsertItem(0,str1);
		m_ListCtrl.SetItem(nItem,1,1,str2,NULL,0,0,0);
		m_ListCtrl.SetItem(nItem,2,1,str3,NULL,0,0,0);
		m_ListCtrl.SetItem(nItem,3,1,str4,NULL,0,0,0);
	}


	// Release memory
	VirtualFreeEx(process, _lvi, 0, MEM_RELEASE);
	VirtualFreeEx(process, _firstitem,  0, MEM_RELEASE);
	VirtualFreeEx(process, _secitem,    0, MEM_RELEASE);
	VirtualFreeEx(process, _thirditem,  0, MEM_RELEASE);
	VirtualFreeEx(process, _fourthitem, 0, MEM_RELEASE);
}

#include <windows.h>
#include <winioctl.h>
#include <stdio.h>

void ShowError(void); //function to display message from GetLastError()

int main(){
	char szVolume[] = "\\\\.\\F:";
	HANDLE hVolume;
	DWORD dwBytes = 0;
	PREVENT_MEDIA_REMOVAL pmr;

	pmr.PreventMediaRemoval = TRUE;

	hVolume = CreateFile(szVolume,GENERIC_READ|GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_EXISTING,0,NULL);
	if(hVolume==INVALID_HANDLE_VALUE){
		ShowError();
		exit(1);
	}
	if(DeviceIoControl(hVolume,IOCTL_STORAGE_EJECTION_CONTROL,(LPVOID)&pmr,(DWORD)sizeof(pmr),NULL,0,&dwBytes,NULL)==FALSE){
		ShowError();
	}
	CloseHandle(hVolume);
	return 0;
}