C / C++ / MFC

Re: How to receive a notification when the app window is activated.

17-May-10 4:42

For example, if the user alt-tabs to the window.

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

Code-o-mat17-May-10 4:49

Code-o-mat

17-May-10 4:49

How about WM_ACTIVATEAPP[^] and/or WM_ACTIVATE[^]?

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <

Re: How to receive a notification when the app window is activated.

sashoalm17-May-10 5:05

Problem with CreateFileMapping() window7/Vista.

17-May-10 5:05

Thanks.

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

janaswamy uday17-May-10 2:38

janaswamy uday

17-May-10 2:38

Hi All,

My problem is that the code no longer works under Windows 7/Vista when
called from within the limited user account. CreateFileMapping()
routine returns ERROR_ACCESS_DENIED (code 5) upon attempt to create
the file mapping object in global namespace.

I've searched the web and discovered that from Vista onwards,
Microsoft has changed the policy that affects who will be granted to
obtain SeCreateGlobalPrivilege and that is it impossible for any code
called from within the limited user account to create global objects.

Does anyone know how to work around this limitation? Any pointers on
how to make this code compatible with Windows 7/Vista would be highly
appreciated.

Thanks & Regards,
Uday.

MFC CreateInstance from CWinThread

IAmRami17-May-10 2:28

IAmRami

17-May-10 2:28

Hello,
I have an application that import contacts from outlook contact directory.
there is a problem that when someone has a very big list of contacts the application get stuck for along time until it finish importing the contacts,
I moved the entire import code to a pthread that will handle the import so the application won't get stuck while it's importing.
to access outlook i'm using this code:
hr=pApp.CreateInstance(__uuidof(Application));
when this code is executed from within a pthread it fails, but when executed normally from the application everything is working fine,
Anyone know what causing this problem?

Thanks.

Code-o-mat17-May-10 2:43

Code-o-mat

17-May-10 2:43

Does that CreateInstance require you to initialize COM before using it (CoInitialize/CoInitializeEx)? If yes, how did you initialize it?

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <

IAmRami17-May-10 3:31

IAmRami

17-May-10 3:31

No initialize is needed,
here is the code access the outlook:
void CXPowerUIView::importFromOutlook()
{
_ApplicationPtr pApp;
_ItemsPtr pItems;
MAPIFolderPtr pFolder;
_ContactItemPtr pContact;

HRESULT hr;

try
{
hr=pApp.CreateInstance(__uuidof(Application));
if (FAILED(hr))
{
MessageBox(_T("Unable to instantiate Outlook."),_T("Outlook Error"),MB_OK);
return;
}
...........
}

This are the 2 ways I call it:
direct:
importFromOutlook();

from thread:
outlookHandle = CreateEvent(NULL, FALSE, FALSE, NULL);
outlookImportThread = ys_thread_create(2000, OutlookThreadFunc, NULL);

void* OutlookThreadFunc(void* pParam)
{
pThisView->importFromOutlook();
return NULL;
}

only direct one is working :/

Code-o-mat17-May-10 3:48

Code-o-mat

17-May-10 3:48

And what does the HRESULT hr tell you? Just a blindshot here, add this to your thread:
CoInitializeex(NULL, COINIT_MULTITHREADED); at the beginning and CoUninitialize at the end. Like:

void* OutlookThreadFunc(void* pParam)
{
CoInitializeEx(NULL, COINIT_MULTITHREADED);
pThisView->importFromOutlook();
CoUninitialize();
return NULL;
}

That _ApplicationPtr::CreateInstance is probably using COM and as far as i know you have to initialize COM in every thread you intend to use it in.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <

How to get all instances of Excel.exe

IAmRami19-May-10 22:05

IAmRami

19-May-10 22:05

Thanks working perfect!

KTTransfer17-May-10 2:17

KTTransfer

17-May-10 2:17

Hi,

I am working on Excel Automation Project.

using GetActiveobject , getting one instance of Excel.exe. But need to track/access any number of instances which are opened.

Initally I am checking all the processes in task manager, if Excel.exe is running, then I will loop through to get the active Excel object using GetActiveObject.

But only one instance I am able to access. How to track other instance of Excel.exe's.

Regards,
KTTransfer.

Re: EnumWindowsProc( ) , EnumProcessModules , FindWindow( ),

Software_Developer17-May-10 3:00

Software_Developer

17-May-10 3:00

This code by a coder dude called NarVish gets the Windows Handles
from process id of excel instance instances.

BOOL CALLBACK EnumWindowsProc(HWND hWnd, LPARAM lParam) 
{
	DWORD dwThreadId, dwProcessId;
	HINSTANCE hInstance;
	char String[255];
	HANDLE hProcess;
	dwThreadId = GetWindowThreadProcessId(hWnd, &dwProcessId);
}
int _tmain(int argc, _TCHAR* argv[])
{
	HWND  hwnd = (HWND)FindWindow(_T("XLMAIN"), NULL); 
        DWORD aProcesses[1024], cbNeeded, cProcesses;
        unsigned int i;

        if( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) )
            return 1;
        cProcesses = cbNeeded / sizeof(DWORD);
        for (i=0; i<cProcesses; i++ )
	{
              if( aProcesses[i] != 0 )
	      {
		  TCHAR szProcessName[MAX_PATH] = _T("<unknown>");
                  HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, aProcesses[i] );
              if ( NULL != hProcess )
			{
				HMODULE hMod;
				DWORD cbNeeded;
 
				if( EnumProcessModules(hProcess, &hMod, sizeof(hMod), &cbNeeded) )
				{
					GetModuleBaseName( hProcess, hMod, szProcessName, sizeof(szProcessName)/sizeof(TCHAR) );  
					if(_wcsicmp(szProcessName,L"EXCEL.EXE") == 0)	//if(strcmp((const char*)szProcessName,(const char*)excelProcName)==0)
					{
						cout<< szProcessName << "--" << aProcesses[i] <<endl;
						Excel::Window* pWindow = NULL;
						pid = aProcesses[i];
						EnumWindows( EnumWindowsProc, NULL);
                                                HRESULT hr = AccessibleObjectFromWindow(hwnd, OBJID_NATIVEOM, __uuidof(Excel::Window), (void**)&pWindow);
						if (hr == S_OK)
						{ 
						}
                                        }
				}
			} 
			// Print the process name and identifier.
			_tprintf( TEXT("%s  (PID: %u)\n"), szProcessName, aProcesses[i] ); 
			CloseHandle( hProcess );
		}
	} 
	return 0;
}

sashoalm17-May-10 5:07

17-May-10 5:07

Do you need the COM instances or just the process handles?

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

KTTransfer17-May-10 18:12

KTTransfer

17-May-10 18:12

I need COM instance.

Excel::_ApplicationPtr.

sashoalm17-May-10 23:33

17-May-10 23:33

This code might help you. Call get_Application function of the obtained document IDispatch to get its application's IDispatch.

void COffCntrDispCtrl::GetDocDispatch()
{
    // No need, if we already have it.
    if(m_pDocDisp != NULL) return;

    // Get a BindCtx.
    IBindCtx *pbc;
    HRESULT hr = CreateBindCtx(0, &pbc);
    if(FAILED(hr)) {
        DoErr("CreateBindCtx()", hr);
        return;
    }

    // Get running-object table.
    IRunningObjectTable *prot;
    hr = pbc->GetRunningObjectTable(&prot);
    if(FAILED(hr)) {
        DoErr("GetRunningObjectTable()", hr);
        pbc->Release();
        return;
    }

    // Get enumeration interface.
    IEnumMoniker *pem;
    hr = prot->EnumRunning(&pem);
    if(FAILED(hr)) {
        DoErr("EnumRunning()", hr);
        prot->Release();
        pbc->Release();
        return;
    }

    // Start at the beginning.
    pem->Reset();

    // Churn through enumeration.
    ULONG fetched;
    IMoniker *pmon;
    int n = 0;
    while(pem->Next(1, &pmon, &fetched) == S_OK) {

        // Get DisplayName.
        LPOLESTR pName;
        pmon->GetDisplayName(pbc, NULL, &pName);
        // Convert it to ASCII.
        char szName[512];
        WideCharToMultiByte(CP_ACP, 0, pName, -1, szName, 512, NULL,
        NULL);

        // Compare it against the name we got in SetHostNames().
        if(!strcmp(szName, m_szDocName)) {

            DoMsg("Found document in ROT!");

            // Bind to this ROT entry.
            IDispatch *pDisp;
            hr = pmon->BindToObject(pbc, NULL, IID_IDispatch, (void
            **)&pDisp);
            if(!FAILED(hr)) {
                // Remember IDispatch.
                m_pDocDisp = pDisp;

                // Notice...
                sprintf(buf, "Document IDispatch = %08lx",
                m_pDocDisp);
                DoMsg(buf);
            }
            else {
                DoErr("BindToObject()", hr);
            }
        }

        // Release interfaces.
        pmon->Release();

        // Break out if we obtained the IDispatch successfully.
        if(m_pDocDisp != NULL) break;
    }

    // Release interfaces.
    pem->Release();
    prot->Release();
    pbc->Release();
}

void COffCntrDispCtrl::TestDispatch()
{
    ASSERT(m_pDocDisp);

    COleDispatchDriver doc(m_pDocDisp);
    DISPID dispID = 0;
    unsigned short *ucPtr = L"Name";

    // Get DISPID for Name.
    HRESULT hr = m_pDocDisp->GetIDsOfNames(IID_NULL, &ucPtr, 1,
    LOCALE_USER_DEFAULT, &dispID);
    ASSERT(!FAILED(hr));


    // Get Name property.
    CString name;
    doc.GetProperty(dispID, VT_BSTR, &name);

    AfxMessageBox(
        CString("Document name is ") + name,
        MB_SETFOREGROUND
    );
}

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal