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Hi all,
I'm trying to open a video stream but problems arise. Have a look at the code below:
::CoInitialize(NULL);
::AVIFileInit();
PAVISTREAM pAvi;
HRESULT hr = ::AVIStreamOpenFromFile
(&pAvi, "any.avi", streamtypeVIDEO, 0, OF_READ, NULL);
if (SUCCEEDED(hr))
{
AVISTREAMINFO si;
::AVIStreamInfo(pAvi, &si, sizeof(AVISTREAMINFO)); // <- Works ok
IGetFrame *pGetFrame;
pGetFrame = ::AVIStreamGetFrameOpen(pAvi, NULL); // <- Always returns NULL
if (pGetFrame != NULL)
{
pGetFrame->Release();
}
pAvi->Release();
}
::AVIFileExit();
Now, according to msdn, AVIStreamGetFrameOpen() returns NULL if it could not find a decompressor for this specific file. I can however view the file in windows media player w/o any problems. Doesn't that imply I do have a decompressor installed for this file???
I'm confused.  Any help on this would be appreciated.
/Niklas
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Hy!
How can I write in the window of a SDI aplication ( derived from CEditView ) from a worker thread??
Bye,
Orbital
...the night is long ... but not long enought to do some real coding ...
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No, it dosen't because this function return the window caption. Here is what MSDN say :
"Copies the CWnd caption title (if it has one) into the buffer pointed to by lpszStringBuf or into the destination string rString. If the CWnd object is a control, the GetWindowText member function copies the text within the control instead of copying the caption. "
Bye,
Orbital
...the night is long ... but not long enought to do some real coding ...
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 I know you can ... but in the answer I specified that I want to change it from a worker thred and the function provide by CEditView are not thread-safe ... if you have any idea whow to workaround this problem I will gratly apreciate ...
Bye,
Orbital
...the night is long ... but not long enought to do some real coding ...
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I've tryed that one to ... but i relly don't want to mdify the MFC source code ... any idea where i can put that critical section ( one is in the worker thread but the ather?? )
Bye,
Orbital
...the night is long ... but not long enought to do some real coding ...
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Why do you want to modify MFC sources? Just use a critical section to ensure that your threads don't use SetWindowText at the same time.
- add the CCriticalSection member, m_csection, as a private member to CYourEditView
- add new method and use it instead of 'plain' SetWindowText:
void CYourEditView::SafeSetWindowText(LPCTSTR szText)
{
CSingleLock lock(&m_csection, TRUE);
SetWindowText(szText);
}
Tomasz Sowinski -- http://www.shooltz.com
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hi all,
i want to know how can i progam parallel port in NT. as i tried b4, outportb() is not possible to use in NT. any method to program parallel port in NT?
thanks,
jim
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See CreateFile(). this is a genric function used for opening both files and devices. You can then use WriteFile and ReadFile to talk to it.
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Please help me,
I've been trying to solve this problem for more than a week now:
I have to open a textfile with a common dialog box, put this file in a buffer, then I have to show this text in a richeditcontrol by calling the buffer.
Oh, yeah: these text files are at least 1MEG big and I'm just getting started with MFC, glups !
Thanks if you can help me...
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Cannot open include file...
Microsoft's products are perfect as always.
What should I do?
Lio.
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mfc42ud.lib is not a header file - it's a library. Anyway, you should set the active configuration to non-unicode before building the sample.
Tomasz Sowinski -- http://www.shooltz.com
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You could use SetText()
or stream the text in with a callback function something like:
DWORD CALLBACK readText(DWORD dwFileHandle, LPBYTE lpBuffer, LONG nbrToRead,
LONG FAR* lpNbrRead)
{
BOOL file = ReadFile((HANDLE)dwFileHandle,lpBuffer, nbrToRead,
(unsigned long*)lpNbrRead, NULL);
if(file == FALSE ){
AfxMessageBox(_T("Could'n open file!"),MB_ICONEXCLAMATION);
return 1;
}
return 0;
}
and then call it with something like this:
EDITSTREAM stream;
HANDLE hFil;
fFormat = SF_TEXT;
strom.dwCookie = (DWORD)hFil;
strom.pfnCallback = readText;
m_recText.StreamIn( fFormat, strom );
/Per
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OK, I've had a better look at it now.
I still have one question: how do I declare m_readText?
Thanks in advance. Lio.
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I want to see only the grid, not a grid in a formview. How do I handle WM_NCPAINT to solve this?
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add a grid as a member in your CView -derived class.
In CView::OnCreate, call the grid's create function, and use GetClientRect() to size it.
then your view need to handle WM_SIZE, and resize the grid to match the window size.
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The menu in my application changes in runtime. For each of the menuchoices I've made an accelerator key. For some of the choices I want the accelerator key to be the same. This is because the menu changes in runtime and these choices never is available at the same time. The problem is that the menu only respond to the accelerator declared first in the table. For example I have three accelerator keys declared with enter, only the first of them respond. How do I solve this?
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Have the command associated with the "enter" accelerator call one function, OnEnterKey().
In this function, decide which action should be taken.
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hi!
i've some probleme with MAPI. i use the following code for send an email via my program :
///
MapiMessage Msg;
MapiRecipDesc Dest;
MapiFileDesc ReportFile;
BOOL bRet = FALSE;
ZeroMemory(&Msg, 0);
ZeroMemory(&Dest, 0);
ZeroMemory(&ReportFile, 0);
ReportFile.nPosition = (ULONG)-1L;
ReportFile.lpszPathName = (LPTSTR)(LPCSTR)g_szTmpCmpFilePath;
ReportFile.lpszFileName = "";
Dest.ulRecipClass = MAPI_TO;
Dest.lpszName = "";
Dest.lpszAddress = "<email de="" votre="" destinataire="">";
Msg.lpszSubject = "";
Msg.lpszNoteText = "";
Msg.nRecipCount = 1;
Msg.lpRecips = &Dest;
Msg.nFileCount = 1;
Msg.lpFiles = &ReportFile;
// Envoi du message
HINSTANCE hInst=LoadLibrary("MAPI32.DLL");
if(hInst!=NULL)
{
ULONG (PASCAL *lpfnSendMail)(ULONG, ULONG, MapiMessage*, FLAGS, ULONG);
(FARPROC&)lpfnSendMail = GetProcAddress(hInst, "MAPISendMail");
lpfnSendMail(NULL, NULL, &Msg, MAPI_DIALOG, NULL);
FreeLibrary(hInst);
bRet = TRUE;
}
//
it work well on my computer, when i try it into a another computer (windows me based systeme) my program crash in WAB32.DLL. somebody know why ? i hope you'll help me.
thx
F.Julien
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I really haven't got a clue, but
ZeroMemory(&Msg, 0);
should be
ZeroMemory(&Msg, sizeof(MapiMessage));
Second parameter is the number of bytes to clear. ZeroMemory(&Msg, 0) doesn't do much work.
Hope that helps.
/Niklas
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