C / C++ / MFC

Adding a COM Interface...

27-Apr-07 14:38

Disclaimer: I have no clue what CxImage is but those link errors are pretty common when forgetting about to tell the linker about the .lib file.

Underneath your "#include" statements for the library, don't forget to include a pragma for it. Also, make sure the .lib file is in your paths or at least in your project directory when linking.

#pragma comment(lib, "Tiff") // If .lib file is called Tiff.lib

dontknowitall27-Apr-07 7:15

dontknowitall

27-Apr-07 7:15

I'm using ATL w/ Attributes and maybe w/ WTL (no MFC and WTL looks interesting). I am trying to figure out how CPTicker (here on CodeProject) was built and I'm stuck on figuring out how to add the IInputObject interface using VC++ .NET 2003. I managed to create an equivalent class (to CTickerBand) by right-clicking on the project->Add Class Wizard->ATL Simple Object.

I switched to the Class View, found my newly added class, right-clicked, Implement Interface Wizard...

Now what? Can't seem to find the IInputObject interface.

It has been a while since I've messed with COM. I'm kind of surprised I remembered that much.

And, for the kind soul, it would be nice to remind me on how to do the rest of these too:
public IInputObject,
public IPersistStreamInitImpl<CTickerBand>,
public IContextMenu,
public IDispatchImpl<ITickerWindow>,
public CTickerWindowImpl

How do I check/uncheck a MENUITEM in a menu?

KellyR27-Apr-07 6:08

KellyR

27-Apr-07 6:08

Hi, so here's what I want to do:

In my VC++ resource file for my project, I have a menu. This menu has a subgroup, Options, and, under Options, another MENUITEM called View. I have View set to be checkmarked. Now, how do I uncheck it programmatically, when my only reference to this item is the ID?

So let's say my ID for View is IDM_VIEW.

I've tried the standard HWND view = GetDlgItem(window, IDM_VIEW); and then sending the windows message BM_SETCHECK with BST_UNCHECKED to the view HWND, but that doesn't seem to work.

Bottom line: I want to toggle this checkmark on and off, and be able to check it from within my program to see if it's checked or not. I was hoping I could do it with BM_GETCHECK windows messages but that doesn't seem to work.

Help is appreciated!

Thanks

Re: How do I check/uncheck a MENUITEM in a menu?

JudyL_MD27-Apr-07 7:40

JudyL_MD

27-Apr-07 7:40

CMenu::CheckMenuItem / GetMenuState

Menues have their own messages, BM_SETCHECK / BST_UNCHECKED deal with buttons (radio and checkbox) on views and dialogs.

Judy

Re: How do I check/uncheck a MENUITEM in a menu?

KellyR27-Apr-07 8:35

KellyR

27-Apr-07 8:35

Thanks.

VC++8: OCX Control -> How do I generate a class wrapper if the control has two interfaces?

Joan M27-Apr-07 3:35

Joan M

27-Apr-07 3:35

Hello all,

I'm trying to use an OCX control inside my application, that OCX has two interfaces; I can see the two interfaces opening the activex control using the OLE Viewer from VC++6.

It seems that when I insert the ocx control in my dialog, the class that is being generated only has the first interface, but not the second one.

In the OLE VIEWER, if I select view typelib, I can see:

- CROSSLIB
-- module XOE
-- dispinterface _DCross
-- dispinterface _DCrossEvents

But in my wrapper class I can see only the things that appear inside the firs interface (_DCross).

Do you know how could I make that second interface to appear?

As always thank you very much in advance.

Widget appearance in CDHtmlDialog

fuzzymonk27-Apr-07 3:13

fuzzymonk

27-Apr-07 3:13

The webbrowser control (and CDHtmlDialog) insists on drawing all the widgets/form elements/buttons in with an legacy-style hard beveled look.

When I use an input tag with type="button" in the webbrowser control it looks like a system button on windows 95. However when I view that same page in IE6 or 7 it has a nice soft rounded look. Is there a way to get webbrowser control to look the same as IE?

Thanks.
-C

Need help to create service

VC_RYK27-Apr-07 2:53

27-Apr-07 2:53

Hi Guys
i am very new to create service using VC++ 2005. can anybody help me,how will i start to do? if some book is available then please do let me know.

With Regards
R e h a n

David Crow27-Apr-07 3:08

27-Apr-07 3:08

Have you searched CP, MSDN, or Googled for examples?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

VC_RYK27-Apr-07 3:13

27-Apr-07 3:13

yaa , i got sample "DevService", which is very concerned of my requirment but i am not able to understand, how to debug and see what is happening behind if i start this service.This service help to detect the arrival or removal of devices, so i want check if i am inserting CD then i should know, CD has arrived.

David Crow27-Apr-07 3:20

27-Apr-07 3:20

VC_RYK wrote:
...how to debug and see what is happening behind if i start this service.

See here and here.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

VC_RYK27-Apr-07 3:37

27-Apr-07 3:37

when i am trying to write log file using
CRITICAL_SECTION myCS;
void WriteLog(char* pMsg)
{
// write error or other information into log file
::EnterCriticalSection(&myCS);
try
{
SYSTEMTIME oT;
::GetLocalTime(&oT);
FILE* pLog = fopen(pLogFile,"a");
fprintf(pLog,"%02d/%02d/%04d, %02d:%02d:%02d\n %s\n",oT.wMonth,oT.wDay,oT.wYear,oT.wHour,oT.wMinute,oT.wSecond,pMsg);
fclose(pLog);
} catch(...) {}
::LeaveCriticalSection(&myCS);
}
it is crashing over ::EnterCriticalSection(&myCS); so can you help to atleast write a log file to know the arrival or removal.

David Crow27-Apr-07 3:47

27-Apr-07 3:47

VC_RYK wrote:
::EnterCriticalSection(&myCS);

How is myCS created/initialized?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

VC_RYK27-Apr-07 4:30

27-Apr-07 4:30

Hi resolve this one but i am trying to install this service by following the steps what is given on MSDN but not get installed.

David Crow27-Apr-07 4:42

27-Apr-07 4:42

VC_RYK wrote:
...but not get installed.

Ok, so what's the problem? Your screen is too far away for me to see.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

bob1697227-Apr-07 3:21

27-Apr-07 3:21

For standard services, it easiest (at least in VC++ 6.0) to create an ATL COM service and remove what you don't want. I only used VS2005 while it was in beta and never tried to create a service with it but I'm guessing that functionality should (operative word) still be there.

How can I update the statusbar info of the MainFrame from the ChildFrame

Nemanja Trifunovic27-Apr-07 3:33

Nemanja Trifunovic

27-Apr-07 3:33

Look here[^] for a nice tutorial on how to write services.

Programming Blog
utf8-cpp

chaoxin27-Apr-07 2:34

chaoxin

27-Apr-07 2:34

I was trying to update the statusbar information with the colour information of pixels.

Image is open in a view clas named CChildView, which is attached to a child frame of the MainFrame named ChildFrame.

What I was trying to Update it using a string, it keeps give me the error message:
Unhandled exception at 0x00402ca6 in ImageLab.exe: 0xC0000005: Access violation reading location 0xbaadf009.
and stopped at here:
CSimpleStringT& operator=( __in const CSimpleStringT& strSrc )
{
CStringData* pSrcData = strSrc.GetData();
CStringData* pOldData = GetData();
if( pSrcData != pOldData)
{
-> if( pOldData->IsLocked() || pSrcData->pStringMgr != pOldData->pStringMgr )
{
SetString( strSrc.GetString(), strSrc.GetLength() );
}
else
{
CStringData* pNewData = CloneData( pSrcData );
pOldData->Release();
Attach( pNewData );
}
}

return( *this );
}

Re: How can I update the statusbar info of the MainFrame from the ChildFrame

bob1697227-Apr-07 14:25

Regarding MSXML3.0 [modified]

27-Apr-07 14:25

I'm not sure about the code you posted but MSDN for VC++ 6.0 has a tutorial for updating from CMainFrame. Look up "CStatusBar"/"updating pane" for that.

However, since m_wndStatusBar is Protected, you will have to stand on your head a bit to get this to work from other classes. For simplicity, lets assume your updating the location of the mouse cursor in the MDI child view coordinates. You can get to the m_wndStatusBar by making it Public but that's not usually desireable so lets create a mutator for it.

In CMainFrame of an MDI app. Add an entry for the pane that will be filled with the coordinates. You would likely create a symbol for this for production but for now, just create an entry reusing the separator symbol and we'll just go for index 1 to speed this demo up.

// MainFrm.cpp
//...
static UINT indicators[] =
{
ID_SEPARATOR, // status line indicator
ID_SEPARATOR, // *** Added ***
ID_INDICATOR_CAPS,
ID_INDICATOR_NUM,
ID_INDICATOR_SCRL,
};
//...
void CMainFrame::SetPaneText(const int nPane, const CString& sPane)
{
// Mutator for protected member
m_wndStatusBar.SetPaneText(nPane,sPane);
}
// MainFrm.h
...
public:
void SetPaneText(const int nPane,const CString& sPane);

// CYourView.h - Note: the placement may vary if conflicts arise
#include "MainFrm.h"

// Use the classwizard to create a WM_MOUSEMOVE handler
void CYourView::OnMouseMove(UINT nFlags, CPoint point)
{
CString sText;
CMainFrame* pFrame=(CMainFrame*)AfxGetMainWnd();

if (pFrame) {
sText.Format(" X=%d Y=%d",point.x,point.y);
pFrame->SetPaneText(1,sText);
}

CScrollView::OnMouseMove(nFlags, point);
}

// End code

Not pretty but it works. However, I'm betting the Update Handler that is discussed in MSDN is the proper way to go so I would recommend trying that and see if it fits your needs. If not, this technique might get you by.

voorugonda prashanth27-Apr-07 2:15

voorugonda prashanth

27-Apr-07 2:15

Hi All,

i'm using IXMLDOMDocumentPtr for loading xml and do operations on it.
when i run my application with purify it is showing a memory leak in CreateInstance & loadXML.
please give me a suggestion where am i wrong? or what changes i need to do.

here is my sample code:

BSTR bstrUserInputsXml=NULL;
{
CoInitialize(NULL);

IXMLDOMDocumentPtr pXMLDom=NULL;

hr=pXMLDom.CreateInstance( "Microsoft.XMLDOM" );
//hr=pXMLDom.CreateInstance( __uuidof(MSXML2::DOMDocument40));

if(FAILED(hr))
{
//cout<<"Failed to instantiate DOMDocument40"<<endl;
return="" -1;
="" messagebox(null,"failed="" to="" instantiate="" domdocument40","keytable.s",mb_ok);=""
="" ;
="" }
="" if(pxmldom-="">load("D:\\userinputs1.xml")!= VARIANT_TRUE)
{
//MessageBox(NULL,"Failed load xml string","KeyTable.s",MB_OK);
return ;
}
bstrUserInputsXml = pXMLDom->xml;

pXMLDom.Release();
CoUninitialize();
}

Thanks in advance.
Prashanthv

-- modified at 14:02 Friday 27th April, 2007

Re: Regarding MSXML3.0

bob1697227-Apr-07 4:06