C / C++ / MFC

Atulmahajan wrote:

LVN_ITEMCHANGED(IDC_PREVIEWLISTCTRL, OnSelectItemFromList) // Line 3

Atulmahajan wrote:

I can capture the select item event. Now I want to get the item text so for this I write following code in message function but returns me blank string. The code is as

CString strJPEGFileName = " ";
int nItem,nSubItem;

strJPEGFileName = mWebPagePrvListCtrl.GetItemText(nItem,nSubItem);

void CDlg::OnItemChanged(NMHDR* pNMHDR, LRESULT* pResult) 
{
    NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
    CString csText = m_clstAnyList.GetItemText( pNMListView->iItem,  pNMListView->iSubItem );

///... Rest of the code
} 

Manoj Srivastava wrote:

1) I have an edit control and I just put some text into them when i clicked on next it will go into a single linked list again & again it will take some data
2) When I close my dialog , all the linked list data will store into file

WalderMort wrote:

I tried this without modifying the memory in any way, a simple set and reset crashes the process!

	STARTUPINFO si;
	PROCESS_INFORMATION pi;

	LPTSTR szExeName = GetCommandLine();

	ZeroMemory( &si, sizeof(si) );
	si.cb = sizeof(si);
	ZeroMemory( &pi, sizeof(pi) );

	// Start the child process. 
	if( ! ::CreateProcess( L"Demo.exe", 0, 0, 0, 0, CREATE_SUSPENDED, 0, 0, &si, &pi ) ) 
		return NULL;

	HANDLE hProcess = OpenProcess(  PROCESS_ALL_ACCESS , FALSE, pi.dwProcessId );

	CONTEXT context;
	ZeroMemory( &context, sizeof( CONTEXT ) );
	context.ContextFlags = CONTEXT_FULL | CONTEXT_DEBUG_REGISTERS;
	if ( ! GetThreadContext( pi.hThread, &context ) )
		return 0;

	LDT_ENTRY entry;
	ZeroMemory( &entry, sizeof( LDT_ENTRY ) );
	GetThreadSelectorEntry( pi.hThread, context.SegFs, &entry );
	DWORD dwFSBase = ( entry.HighWord.Bits.BaseHi << 24 ) | ( entry.HighWord.Bits.BaseMid << 16 ) | ( entry.BaseLow );

	DWORD read;
	Local::TEB teb; ZeroMemory( &teb, sizeof( Local::TEB ) );
	Local::PPEB pPeb = NULL;
	if ( ReadProcessMemory( hProcess, (LPCVOID)(DWORD_PTR)dwFSBase, &teb, sizeof( Local::TEB ), &read ) )
		pPeb = teb.Peb;
	else
		return NULL;

	IMAGE_DOS_HEADER DosHeader;
	IMAGE_NT_HEADERS NtHeader;

	DWORD dwBase = (DWORD)(DWORD_PTR)pPeb->ImageBaseAddress;
	DWORD dwSize = 0;

	ReadProcessMemory( hProcess, (LPCVOID)(DWORD_PTR)dwBase, &DosHeader, sizeof( IMAGE_DOS_HEADER ), &read );
	if ( DosHeader.e_magic != IMAGE_DOS_SIGNATURE )
		throw "Not a valid executable file.\n";

	ReadProcessMemory( hProcess, (LPCVOID)(DWORD_PTR)(dwBase + DosHeader.e_lfanew), &NtHeader, sizeof( IMAGE_NT_HEADERS ), &read );
	if ( NtHeader.Signature != IMAGE_NT_SIGNATURE )
		throw "No PE header found.\n";

	dwSize = NtHeader.OptionalHeader.SizeOfImage;

	BOOL bSuccess = FALSE;
	DWORD dwOldProtect;

	bSuccess = VirtualProtectEx( hProcess, (PVOID)dwBase, m_dwImageSize, PAGE_EXECUTE_READWRITE, &dwOldProtect );

...

	bSuccess = VirtualProtectEx( hProcess, (PVOID)dwBase, m_dwImageSize, PAGE_EXECUTE, &dwOldProtect );

	CloseHandle( hProcess );

	ResumeThread( pi.hThread );

	return pi.hProcess;

WalderMort wrote:

if( ! ::CreateProcess( L"Demo.exe", 0, 0, 0, 0, CREATE_SUSPENDED, 0, 0, &si, &pi ) )

HANDLE hSnap = CreateToolhelp32Snapshot( TH32CS_SNAPMODULE, pi.dwProcessId );<br />
    MODULEENTRY32 stEntry = {0};<br />
    stEntry.dwSize = sizeof(MODULEENTRY32);<br />
    Module32First(  hSnap,  &stEntry );

WalderMort wrote:

You say only kernel32 and ntdll are loaded

WalderMort wrote:

I don't suppose you tried out my code on your machine

WalderMort wrote:

DWORD dwFSBase = ( entry.HighWord.Bits.BaseHi << 24 ) | ( entry.HighWord.Bits.BaseMid << 16 ) | ( entry.BaseLow );