C / C++ / MFC

class WININFO
{
public:
	CWnd *hWnd;
	HINSTANCE hInst;
	CString title;
	WININFO(CWnd *wnd = NULL, HINSTANCE inst = NULL) {hWnd = wnd; hInst = inst; title = "";}
};
typedef CArray<WININFO,WININFO> CArrayWinInfo;

BOOL CALLBACK CIOGuidesView::enumwndfn(HWND hWnd, LPARAM lParam)
{
	CIOGuidesView *me = (CIOGuidesView *)lParam;
	return me->enumwndfn(CWnd::FromHandle(hWnd));
}

BOOL CIOGuidesView::enumwndfn(CWnd * wnd)
{
	WININFO wininfo(wnd);

	wnd->GetWindowText(wininfo.title);

	DWORD ProcessId; 
	GetWindowThreadProcessId (wnd->GetSafeHwnd(), &ProcessId ); 
	wininfo.hInst = (HINSTANCE)ProcessId;

	m_WinInfoArray.Add(wininfo);

	return TRUE;
}

void CIOGuidesView::OnButton1() 
{
	CString filename("PDF Files\\751018a.pdf");

	HANDLE hProcess = NULL;
	SHELLEXECUTEINFO shellInfo;
	::ZeroMemory(&shellInfo, sizeof(shellInfo));
	shellInfo.cbSize = sizeof(shellInfo);
	shellInfo.lpVerb = "open";
	shellInfo.lpFile = filename;
	shellInfo.fMask = SEE_MASK_NOCLOSEPROCESS;
	if(::ShellExecuteEx(&shellInfo))
	{ /* success */
		hProcess = shellInfo.hProcess;
	} /* success */
	else
	{
		ShowLastError("ShellExecuteEx Failed");
		return;
	}


	int reason = WaitForInputIdle(hProcess,INFINITE);
	// blah, blah

hProcess=0x01D8  hInst=0x045C  title='Acrobat Reader'

BOOL CIOGuidesView::enumwndfn(CWnd * wnd)
{
   WININFO wininfo(wnd);

   wnd->GetWindowText(wininfo.title);

   DWORD ProcessId; 
   GetWindowThreadProcessId (wnd->GetSafeHwnd(), &ProcessId ); 
   // We open a handle to the process, which can be compared with the handle returned by ShellExecuteEx.
   // Sometime in the future, we must call CloseHandle with the handle returned by OpenProcess...
   HANDLE a_hProcess = OpenProcess( PROCESS_QUERY_INFORMATION, FALSE, ProcessID );
   wininfo.hInst = (HINSTANCE)a_hProcess;

   m_WinInfoArray.Add(wininfo);

   return TRUE;
}

// We open a handle to the process, which can be compared with the handle returned by ShellExecuteEx.<br />
// Sometime in the future, we must call CloseHandle with the handle returned by OpenProcess...

BOOL CIOGuidesView::enumwndfn(CWnd * wnd)
{
	WININFO wininfo(wnd);
		

	wnd->GetWindowText(wininfo.title);
		

	DWORD ProcessId; 
	GetWindowThreadProcessId (wnd->GetSafeHwnd(), &ProcessId ); 
		

	// We open a handle to the process, which can be compared with the handle
	// returned by ShellExecuteEx.
	HANDLE a_hProcess = OpenProcess( PROCESS_QUERY_INFORMATION, FALSE, ProcessId );
	wininfo.hInst = (HINSTANCE)a_hProcess;
	CloseHandle(a_hProcess);  // only need it for comparison purposes
		
	//wininfo.hInst = (HINSTANCE)ProcessId;  // the wrong way...

	m_WinInfoArray.Add(wininfo);

	return TRUE;
}

// Get the name of the program that runs on a .pdf file
char *filename = "C:\\src\\IOGuides\\PDF Files\\751018a.pdf";
TCHAR szExe[MAX_PATH];
::FindExecutable(filename, _T(""), szExe);

HANDLE hProcess = NULL; // Use for WaitForInputIdle()
STARTUPINFO startupInfo;
PROCESS_INFORMATION processInfo;
::ZeroMemory(&startupInfo, sizeof(startupInfo));
startupInfo.cb = sizeof(startupInfo);
::ZeroMemory(&processInfo, sizeof(processInfo));  // better safe than sorry

char cmd[MAX_PATH + MAX_PATH + 5];
sprintf(cmd,"\"%s\" \"%s\"", szExe, filename);
BOOL startedOK = CreateProcess(
    NULL,
    cmd,    // "acrord32.exe file.pdf"
    NULL,   // Process security
    NULL,   // Thread security
    FALSE,  // Inheritance
    0,  // no special startup flags
    NULL,   // no special environment
    NULL,   // no default startup directory
    &startupInfo,
    &processInfo);

if(!startedOK)
{
    ShowLastError(filename);
    return;
}

hProcess = processInfo.hProcess;
WaitForInputIdle(hProcess,INFINITE);

BOOL CIOGuidesView::enumwndfn(CWnd * wnd)
{
	WININFO wininfo(wnd);
 
	wnd->GetWindowText(wininfo.title);
 
	DWORD ProcessId; 
	GetWindowThreadProcessId (wnd->GetSafeHwnd(), &ProcessId ); 
	wininfo.Pid = ProcessId;
 
	m_WinInfoArray.Add(wininfo);
 
	return TRUE;
}

void CYourListView::SetTopIndex( int p_iDesiredTopIndex )
{
   CListCtrl & a_roList = GetListCtrl();
   CRect       a_oRect( 0, 0, 0, 0 );
   
   // Get the height of one item.
   a_roList.GetItemRect( 0, &a_oRect, LVIR_BOUNDS );
   
   // Scroll the control vertically, by the amount of height of one item multiplied by the desired top index.
   a_roList.Scroll( CSize( 0, p_iDesiredTopIndex * a_oRect.Height() ) );
}