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thanks
i just got it... sooo simple...........  )))))) )))
good luck to others, sorry very busy with last sem exams, n major project stuffs or would have tried to help around a little
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Hi I am new VC++. Currently i am java application that will make use of COM(Component Object Model) to get Interface information. Basically I am using a IDispatch interface object to get a pointer to LTypeInfo. And I am using the function 'GetTypeInfo'. The problem is the function returns 'S_OK' but still pTypeInfo (pointer) is null. Can somebody help me out. In which scenario GetTypeInfo will return 'S_OK' but still the pointer will be null.
Following is the code snippet
===================================
ITypeInfo* pTypeInfo;
m_hRet = m_pDisp->GetTypeInfo(0,LOCALE_SYSTEM_DEFAULT,&pTypeInfo);
if(m_hRet!=S_OK || pTypeInfo==NULL)
{
#ifdef DISPDRIVER_DEBUG
_tprintf(_T("GetTypeInfo failed: %x\n"),m_hRet);
#endif
if(pTypeInfo==NULL && m_hRet==S_OK )
MessageBox(NULL, "Error : pTypeInfo is null", "1", MB_OK);
return false;
}
===================================
Please help me,since i am totally stuck at this point. Thanks In advance.
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I want to convert doc/txt file to PDF using C++ win32(Don't want any third party Library) console app.
Final o/p exe should be used as follows.
ConvertDocToPdf.exe source.doc tar.pdf
Thanks & Regards,
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Member 4708266 wrote: Don't want any third party Library
Sounds like you should build your own. It's actually pretty easy once you get your first postscript file put together programmatically and start to understand the Adobe PDF Reference. It takes about 6 months to build a full GDI/GDI+ compatible interface but if you only want text then you can shave off a couple of months since you won't be interested in scraping bitmap information into image resources and the like.
PDF Reference 1.7, Sixth Edition[^]
(I recommend downloading this reference if your going to view it as it tends to download resources as they are needed if you view it online in the IE window) 1000+ pages
Note: Everything you need is in this reference. However, it is very mathematical and not user-friendly at first glance but if you stay your course, it all comes together nicely in a few weeks and you make the most progress (coding-wise) after that. There are not any real support groups unfortunately. Most forums are maintained by people who have built their own products and are trying to get you to give up building your own and use theirs (for a price of course).
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You forgot to point him to the DOC reference, which is equally easy  
-Saurabh
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??? 
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Member 4708266 wrote: Don't want any third party Library
Why the reason for this ? You really want to rewrite everything yourself  ?
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Hi everyone, I have been trying to send data through windows messaging from a dialog to a windows service, both of which I have created. I can send data from the service to the dialog fine, I just let OnCopyData handle it. My windows service, with my limited knowledge, doesn't have anything like that, I think. I created a thread in my windows service to look for messages. I know I can't cast the datastructure to a LPARAM or cast back the LPARAM to my datastructure, the code below just shows as an example what I want to do. If there is a way, please let me know. I look forward to be educated by you.
void myMessageThread( VOID *)
{
MSG l_msgMessage;
hWndMain = ::CreateWindow( _T("STATIC"), _T("Sample"), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL);
CString c_CopyDataMessage;
l_msgMessage.hwnd = hWndMain;
PCOPYDATASTRUCT l_newdata;
while( GetMessage(&l_msgMessage, hWndMain, 0, 0) !=100 ){
if( l_msgMessage.message == WM_myCopyData ){
l_newdata = (PCOPYDATASTRUCT)l_msgMessage.lParam;
}
TranslateMessage( &l_msgMessage );
DispatchMessage( &l_msgMessage );
}
}
modified on Monday, November 17, 2008 9:30 PM
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*bump*
I know how to use shared memory and named pipes, but I want to know how to do it with Windows Messaging and for a Win 32 console app. Any help would be appreciated, even if its an answer telling me its impossible.
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I have an application that connects to a Sound Level Meter. A new feature request is to be able to provide a live streaming audio of what the instrument is recording. The data coming from the instrument is in a raw PCM format and I request a new packet of data every second.
Right now, I am saving the data into a .wav file by creating a RIFF header based on the channels, bits per sample, and sample rate configured on the instrument and calculating an arbitrary size based on 10 minutes of data. I then start writing each packet of data to the file. My plan was to then start a playback after 5 seconds using the default wave player. So far, nothing has worked. Windows Media Player complains that the file is in use (since I am still writing to it) and Nero complains that the header is invalid (most likely since the size data is not actually correct). I have also tried mciSendString() without success.
I have absolutely no experience with streaming audio so I am not sure I am even going down the correct path. If anyone has any thoughts or suggestions, I would be grateful.
Thanks,
-LG
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Was just looking through Charles Pretzold's "Programming Windows, Fifth Edition" the other day and I noticed a section that dealt with wave form audio. All I've done is compile the example code, which dynamically creates a sine wave of desired frequency and outputs it to the sound-card.
I suppose the only real difference would be the way in which the buffer containing the sound bytes is created.
Hope this link helps. sineWAV.zip
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I am trying to add a pull down to my MFC application. I want to make sure that I have my terminology correct. By a pull down item, I mean something that sits in the body of the window and enables the user to select one item from a list of items. For example, if you go to the website: http://cgi.money.cnn.com/tools/retirementplanner/retirementplanner.jsp, you will see a pull down menu to select the typical annual raises. That is what I mean by a pull down menu.
Now, my question is, how should I implement that in MFC? Is it done with a CComboBox?
Thanks
Bob
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Yes, that is a CComboBox.
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I am trying to use a CComboBox, however, the code is not working. Below is the code that I am using to create the CComboBox:
accountTypes[accountCount].CreateEx( WS_EX_CLIENTEDGE, TEXT("listbox"), NULL,
WS_CHILD | WS_VISIBLE | LBS_STANDARD ,
200, 200, 100, 25, m_hWnd, (HMENU)(IDC_ACCOUNT_TYPES + accountCount), NULL );
CClientDC dc(this);
accountTypes[accountCount].ResetContent();
for( int i = 0; i < sizeof(accountStrings)/sizeof(accountStrings[0]); i++ ) {
int retValue = accountTypes[accountCount].AddString( accountStrings[i] );
retValue = 0;
}
where IDC_ACCOUNT_TYPES is defined to be 500 and accountCount is an integer variable with values like
0 or 1. When I run the code, I get an area where the user can type, not a pull down. I am thinking that I created the pull down with the wrong type, but I am not sure what the correct type is.
Please tell me what I am doing wrong.
Thanks
Bob
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In the dialog editor, select the properties of the ComboBox and change the Type to Drop List.
I have not used CreateEx to make a ComboBox before so I am not sure that will work, but the style for a drop list is CBS_DROPDOWNLIST. You could try replacing LBS_STANDARD with that and see if it works.
-LG
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LG,
Thanks for the response. All my MFC code is hand written. Therefore, I tried your second suggestion. However, it did not work. Any other ideas?
Bob
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I am guessing that your accountTypes is of type CListBox. Try using CComboBox instead.
Here is an example from Programming Windows with MFC by Jeff Prosise:
CComboBox m_wndComboBox;
m_wndComboBox.Create(WS_CHILD | WS_VISIBLE | WS_BORDER |
WS_VSCROLL | CBS_DROPDOWNLIST | CBS_SORT, rect, this, IDC_COMBOBOX);
This will create a drop-down list combo box that will automatically sort the items added and will display a vertical scroll bar if the items exceed the size of the rect.
Hope this helps.
-LG
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BobInNJ wrote: TEXT("listbox") ... LBS_STANDARD
Your code is for a listbox, not a combobox.
Try TEXT("COMBOBOX") and CBS_DROPDOWNLIST instead.
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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I have been told that the correct term for what I am asking for is not pull down but drop down. Therefore, I am asking how to implement a drop down menu using MFC.
Thanks
Bob
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Can anybody provide me hint as how to get parent process command line in 64 bit.
I used the NtQueryInformationProcess() in conjunction with date structures:
typedef struct _PROCESS_BASIC_INFORMATION {
PVOID Reserved1;
PPEB PebBaseAddress;
PVOID Reserved2[2];
ULONG_PTR UniqueProcessId;
PVOID Reserved3;
} PROCESS_BASIC_INFORMATION
struct _PEB2
{
DWORD dwFiller[4];
DWORD dwInfoBlockAddress;
} PEB2;
struct _INFOBLOCK
{
DWORD dwFiller[16];
WORD wLength;
WORD wMaxLength;
DWORD dwCmdLineAddress;
} Block
to retrieve parent process's command line info. Worked well in 32 bit application, but failed in 64 bit application.
Any helps from you guys are greatly appreciated.
Jack Rong
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I am working with a virtual list control for the first time. Everything is working great... almost.
One remaining problem I have is that I would like to have the first item in the list selected by default when the list is initially displayed.
With a normal list, I would set the item as 'selected' in OnInitDialog() after loading the list into the control, but now since it's virtual, I guess there's nothing in the list control to select yet at this point.
After OnInitDialog(), I can see it going in and out of OnGetDispInfo(), so I guess that's where it's actually getting the items that it needs to load into the list.
Obviously I need to wait until after that first set of items has been loaded into the list control before I can set the first item as selected.
But where in the code can I sneak that in?
I just don't know enough about where things are happening to know where I can do this. Nothing I've tried has worked.
Thanks in advance for any ideas.
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How and from where are you adding items to the list control?
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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I'm getting my list of items (CStrings) from doing a database SELECT, then as I loop through each of the results, for a normal list control I would have inserted each item directly into the list control in OnInitDialog(), now for virtual I'm just putting those items into a list at that point, and then pointing the virtual list control to my list, calling .SetItemCount() to set the size for the list control, making the control LVS_OWNERDATA style, etc., following the tutorial in the link below:
http://www.codeproject.com/KB/list/virtuallist.aspx[^]
My OnGetDispInfo() function is pretty simple and looks like this:
void MyDlg::OnGetDispInfo(NMHDR* pNMHDR, LRESULT* pResult)
{
LV_DISPINFO* pDispInfo = (LV_DISPINFO*)pNMHDR;
LV_ITEM* pItem= &(pDispInfo)->item;
int itemid = pItem->iItem;
if (pItem->mask & LVIF_TEXT) //valid text buffer?
{
CString text = MyList_.at(itemid);
lstrcpyn(pItem->pszText, text, pItem->cchTextMax);
} // if
*pResult = 0;
}
I don't know if this is typical, but I also had problems in general with programmatically selecting an item in the virtual list control. SetItemState() didn't seem to work at all. (I should mention that I am forced to use Visual C++ 5.0, so I don't know if this could be an old problem that no longer exists). But I did see someone else had this same problem, and suggested a fake mouse click on the item. (See section 'Selection Problems' in the article below)
http://www.ddj.com/184404349;jsessionid=BVQZXGZXOGLUSQSNDLOSKH0CJUNN2JVN?_requestid=130370[^]
So I followed exactly what this guy did, and in general it seems to work great, (even though it doesn't feel like the best solution).
The only issue is with that initial selection when the list first displays. Maybe if SetItemState() worked properly, it wouldn't be an issue. Maybe it's because I'm having to simulate that mouse-click, and there's not really anything there to click on yet.
I'm not really sure.
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AmVal wrote: then pointing the virtual list control to my list, calling .SetItemCount() to set the size for the list control
Cool thanks!
You should be using SetItemCountEx() instead of SetItemCount() on a virtual list
(ListView_SetItemCountEx() is the Win32 equivalent).
Right after that call would be the place to select an item I would think.
You shouldn't have to simulate a mouse click...
Are you sure the selection isn't sticking just because the control doesn't have focus?
Where are you calling SetItemCount() from?
What does your SetItemState() code look like?
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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