C / C++ / MFC Discussion Boards

G. White14-Nov-02 13:18

14-Nov-02 13:18

Hi,
I have been working on this program for quite a while and have been doing quite well. Somehow, however I seem to have done something wrong. Being new to this I am at a total loss trying to decipher this error message. I checked MSDN and got something that doesn't seem to help me. I'd really appreciate it if someone could please tell me what this error might mean. The program worked yesterday, and today it doesn't, with no changes by me in between.

Project4 error LNK2019: unresolved external symbol "protected: __thiscall CProject4Doc::CProject4Doc(void)" (??0CProject4Doc@@IAE@XZ) referenced in function "public: static class CObject * __stdcall CProject4Doc::CreateObject(void)" (?CreateObject@CProject4Doc@@SGPAVCObject@@XZ)

Thanks a lot
Garry Confused | :confused:

Re: Error message help?

Ranjan Banerji14-Nov-02 14:25

Ranjan Banerji

14-Nov-02 14:25

Most likely you have not defined your function. You have in your .h file something like:

class CProject4Doc {
CProject4Doc();
.
.
.
};

But in your .cpp you do not have this function/constructor defined.

Thats the most obvious though unlikely reason. The fact that it worked one day and not another without code change... well ..... something had to have changed. Or maybe your compile yesterday was not a rebuild all and the file dates were kind of screwed up so the compiler did not pick the file in question and so the error did not show up.

Re: Error message help?

G. White14-Nov-02 14:33

G. White

14-Nov-02 14:33

WOW!!!! As unlikely as it mat have been I must have somehow deleted the constructor/destructor. I don't remember doing it but must have somehow. THANKS INCREDIBLY!!!!

Garry Cool | :cool:

can CHtmlView load JApplet.class ?

includeh1014-Nov-02 12:56

includeh10

14-Nov-02 12:56

i use CHtmlView to laod a html page which includes a swing.class object, the page is ok (text etc. are shown) but swing.class (extends JApplet)is not shown.

do u know how to use CHtmlView to display a JApplet.class object?

thx

includeh10

Re: can CHtmlView load JApplet.class ?

NormDroid15-Nov-02 8:47

NormDroid

15-Nov-02 8:47

MFC != java

Processor Speed?

Peter Weyzen14-Nov-02 12:25

Peter Weyzen

14-Nov-02 12:25

How does one get the processor speed from windows -- without actually testing it myself?

Windows seems to know it, but how can I get the same info?

Re: Processor Speed?

KevinHall14-Nov-02 15:46

KevinHall

14-Nov-02 15:46

From the registry:

HKEY_LOCAL_MACHINE > HARDWARE > DESCRIPTION > CentralProcessor > 0 > ~MHz

If you just want to know, use regedit.exe. If you need an application to read it, use the windows registry access functions.

Re: Processor Speed?

KevinHall14-Nov-02 20:20

KevinHall

14-Nov-02 20:20

Sorry, I forgot that my previous answer is only good on NT/2K/XP.

Check out the CPUTest article here on CodeProject:
http://www.codeproject.com/system/cputest.asp

I believe this should work on 95/98/Me, but only with CPUs that have the RDTSC instruction. Also, the code in this article does actually measure the speed, but it allows the measurement to be done rather quickly.

Win95/98/Me probably also stores the CPU information in the registry. I just don't happen to know where. I suggest doing a search here on CodeProject, on Google, or on CodeGuru.

- Kevin

Re: Processor Speed?

Patje14-Nov-02 21:30

Patje

14-Nov-02 21:30

The following CodeProject article contains a class that allows you to query that:
http://www.codeproject.com/system/camel.asp[^]

Enjoy life, this is not a rehearsal !!!

hwnd of edit control of a combobox

ed987114-Nov-02 12:21

ed9871

14-Nov-02 12:21

How do I get the hwnd of the edit control portion of a combobox?

In a dialog I need to know if a certain control has focus.

CComboBox m_cLookup;

if(GetFocus()->GetSafeHwnd() == m_cLookup.GetSafeHwnd()){<br />
      // do stuff<br />
}

Doesn't work for a combobox, but works fine for a CEdit, so I'm assuming the hwnd of the edit control portion of the combobox is different from the hwnd of the combobox itself.

Ed

Re: hwnd of edit control of a combobox

NormDroid15-Nov-02 8:57

NormDroid

15-Nov-02 8:57

Need to find the edit window on the control.... see below...

HWND EditWnd = NULL;
::EnumChildWindows(cLookup.m_hWnd, EditFindProc, (LPARAM)&EditWnd);

BOOL CALLBACK CFindBar::EditFindProc(HWND hWnd, LPARAM lParam)
{
char szBuffer[255];

::GetClassName(hWnd, szBuffer, sizeof(szBuffer));
if (!::lstrcmp(szBuffer, "Edit"))
{
*((HWND*)lParam) = hWnd;
return FALSE;
}

return TRUE;
}

DirectX problem...

Selevercin14-Nov-02 12:15

Selevercin

14-Nov-02 12:15

Hi,

I just recently used Marcio Ritter's tutorial on game programming to make a directX app. Sadly, it's not working (the OnIdle() function is causing problems). I asked Marcio about it, but I believe he is pretty busy, and was hoping that maybe some could glance at the code. It's very basic, and I'm sure it's something very simple that's causing it to crash. Oh well, if you would like to look at it, my e-mail is nreveles@austin.rr.com

Thanks for your time,

~ Selevercin

If you have a problem with my spelling, just remember that's not my fault. I [as well as everyone
else who learned to spell after 1976] blame it on
Robert A. Kolpek for U.S. Patent 4,136,395.

Re: DirectX problem...

Gero Gerber14-Nov-02 12:32

Gero Gerber

14-Nov-02 12:32

If you think OnIdle() crashes just post some source code.

Gero

Re: DirectX problem...

Selevercin14-Nov-02 13:31

Selevercin

14-Nov-02 13:31

I didn't think it would be much help by itself, but here it is anyway Smile | :)

<code>
HRESULT hRet;

	g_Brick.Draw(g_pDDSBack, 10, 10, 2, 2, 10, 10);

    while( 1 )
    {
        hRet = g_pDDSFront->Flip(NULL, 0 );
        if( hRet == DD_OK )
        {
            break;
        }
        if( hRet == DDERR_SURFACELOST )
        {
            g_pDDSFront->Restore();
        }
        if( hRet != DDERR_WASSTILLDRAWING )
        {
            break;
        }
    }

If you have a problem with my spelling, just remember that's not my fault. I [as well as everyone
else who learned to spell after 1976] blame it on
Robert A. Kolpek for U.S. Patent 4,136,395.

Re: DirectX problem...

Paul M Watt14-Nov-02 18:22

Paul M Watt

14-Nov-02 18:22

Have you stepped through it with a debugger?

Where does it crash? Does it crash the first time through the loop? At the very least I would add some trace statements so that you can tell what happens each time through the loop.

With out any more information I dont really know how to help you.

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

Re: DirectX problem...

Selevercin15-Nov-02 11:54

Selevercin

15-Nov-02 11:54

Ok, sorry. I have not actually ran the debug because my app runs full screen and that seems to be causing debug problems. I also do not understand how to use trace properly Blush | :O

I have, however, determined that the following statement is causing it to crash:

g_Brick.Draw(g_pDDSBack, 10, 10, 2, 2, 10, 10);
</code>

Perhaps you could quickly explane how to use trace?

Sorry about the inadaquate information,

~ Selevercin

If you have a problem with my spelling, just remember that's not my fault. I [as well as everyone
else who learned to spell after 1976] blame it on
Robert A. Kolpek for U.S. Patent 4,136,395.

Re: DirectX problem...

Paul M Watt14-Nov-02 12:42

Paul M Watt

14-Nov-02 12:42

Let me know where I can look at your code and I will take a stab at it.

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

OnNcHitTest with Self-calculated rect

AnTri14-Nov-02 11:47

AnTri

14-Nov-02 11:47

Hello, please excuse my bad english....

I want to create a resizeable rect. (I know I can do this with WS_THICKFRAME, but the Border is to thick...)

So I override the WM_NCCALCSIZE function and deflate my window about 5 pixel. So I had a new Non-Client area. When I receive for example a WM_NCMOUSEMOVE message the nHitTest-Paramter is HT_BORDER and not for example HT_LEFT (when I move from the left side). Why send the OnHitTest method not HT_LEFT? Is there a chance to calc the correct Message automaticly (as WS_THICKFRAME)

Creating a FrameWindow without View or doc

User 988514-Nov-02 11:27

User 9885

14-Nov-02 11:27

I did this in the InitInstance

m_pMainWnd = new CMainFrame;
m_pMainWnd->LoadFrame(IDR_MAINFRAME);
m_pMainWnd->ShowWindow(SW_SHOW);
m_pMainWnd->UpdateWindow();

The problem is that my toolbar insists on being in the child area. ie, it is inside the client edge of the framewindow.

What is wrong?

CMainFrame::OnCreate looks like this.

if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
    return -1;

if (!m_toolbar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP
    | CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||
    !m_toolbar.LoadToolBar(IDR_MAINFRAME))
{
    return -1;
}


m_toolbar.EnableDocking(CBRS_ALIGN_ANY);
EnableDocking(CBRS_ALIGN_ANY);
DockControlBar(&m_toolbar);


return 0;

My article on a reference-counted smart pointer that supports polymorphic objects and raw pointers

modified 29-Aug-18 21:01pm.

Re: Creating a FrameWindow without View or doc

User 988514-Nov-02 14:26

User 9885

14-Nov-02 14:26

problem solved. it needed a view also - otherwise, RecalcLayout does not see the controlbars.

My article on a reference-counted smart pointer that supports polymorphic objects and raw pointers

modified 29-Aug-18 21:01pm.

How to read Unicode text files?

Vladimir L.14-Nov-02 10:58

Vladimir L.

14-Nov-02 10:58

Does anybody have an example that reads Unicode text file?

Thanks in advance!

Best regards,
Vladimir

Borland C++??

Chip Rabinowitz14-Nov-02 10:25

Chip Rabinowitz

14-Nov-02 10:25

I very badly need to get an old copy of Borland C++ 4.5 or 5.0 with OWL for an old project....my old hard drive died, and i need to rebuild something!

Please email me if anyone can find the old CD.....

Re: Borland C++??

Selevercin14-Nov-02 12:10

Selevercin

14-Nov-02 12:10

My school provides a link to an old copy (yes, I'm sad to say that my school actually uses Borland)...

Try this

Hope it's what your looking for,

~ Selevercin

If you have a problem with my spelling, just remember that's not my fault. I [as well as everyone
else who learned to spell after 1976] blame it on
Robert A. Kolpek for U.S. Patent 4,136,395.

eMbedded Visual C++ "Close" Button

RebelCause14-Nov-02 9:07

RebelCause

14-Nov-02 9:07

I created a dialog box and added a button to close the dialog box when I was finished. I added CDlg::EndDialog(nResults); and it didnt work when I moved the source code onto the PDA?

RebelCause

eMbedded Visual C++ Scroll Bar

RebelCause14-Nov-02 9:04

RebelCause

14-Nov-02 9:04

I created a long dialog box. I added a scrollbar in the properties of the dialog box. When I load the dialog box on the PDA I dont get a scroll bar?

Need Help Confused | :confused:

RebelCause

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