C / C++ / MFC Discussion Boards

sinbaski6-May-04 7:48

6-May-04 7:48

Thank you for your help!
I debugged the program again and solved some of the problems by myself. But the following one is really puzzling:
VC6.0 reported after compiling:
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main

The WinMain function is written as follows:
int _stdcall WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow )
{
//register the window class and carry out things like that
}

I used the appWizard to create a win32 application and all the problems were gone. However, I still don't understand why the error was reported. _main is not defined in the win32 application either.

Thank you for all your help!

Re: How to use the windows API?

David Crow6-May-04 8:45

David Crow

6-May-04 8:45

See if MSDN article Q291952 is of any help.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: How to use the windows API?

Mikey_E20-Jun-04 13:44

Mikey_E

20-Jun-04 13:44

Just wanted to say thanks for posting this! I ran into the same problem and the article solved it for me! Thanks!! Big Grin | :-D

Mike Ellertson

CustomCtrl and ToolTip - Redraw Problem

AnTri6-May-04 4:40

AnTri

6-May-04 4:40

hey, just a tiny problem:

i use a CDialog with a couple of CustomCtrls arrange vertical. My CustomCtrl uses a CToolTipCtrl to display ctrl states.
When the Tooltip appears the control "under" the tooltip would not be repainted up to to the time the dialog call invalidate or the control gets the focus.

How can I solve that problem?

child windows inside child frame ( MDI )

amit_k_gupta6-May-04 3:52

amit_k_gupta

6-May-04 3:52

Hi,
I want to open multiple childs windows inside one of the childframe window of an MDI application. Any idea about how to achieve this?.

Details is like below:

I have my mainframe window derived from CMDIFrameWnd. Now in one of the childframe ( derived from CMDIChildWnd ) I want to open mutiple child windows i.e my child frame should behave as a parent to another child windows. Please let me know how to achieve this.

Any sample would be of great help.

Thanks,
Amit

Re: child windows inside child frame ( MDI )

Iain Clarke, Warrior Programmer6-May-04 5:41

Iain Clarke, Warrior Programmer

6-May-04 5:41

The classic point to create child windows would in your CChildFrame::OnCreate handler.
I know the CSplitterWnd stuff goes there. You can also add toolbars etc at that point.

Iain.

Printing in XP

olsilverfox5-May-04 14:48

olsilverfox

5-May-04 14:48

Have a wierd one. One of our customers recently purchased a new computer with XP PRO installed. Out software prints fine on others customer's pcs running XP PRO, but this one wants to print everything upside down and backwards. Has anyone ever seen this happen. Would appreciate anyone's input.

Walt McWhirter
Compact Communications Systems

Re: Printing in XP

Iain Clarke, Warrior Programmer6-May-04 5:46

Iain Clarke, Warrior Programmer

6-May-04 5:46

Have you tried putting the paper in the other way around? Big Grin | :-D

More seriously, I would look at differences in printer / printer drivers rather than XP.
I used to have a lot of problem with Epson drivers when HP ones worked just fine.
Does the problem happen when you change printers? Does it happen on a known-good-system
with the suspect printer?

Does the issue happen if you print from another application? Or just yours? I usually
use Wordpad as a simple should-be-fine application.

Is it just an (obsure) option in the print setup?

Iain.

Re: Printing in XP

Chris Meech6-May-04 6:41

Chris Meech

6-May-04 6:41

This is likely some really obscure print driver option that is running amuck, but if you solve it, I'd love to hear the reason. This sounds like a great trick to play on some of my evil co-worker's PC. :mwaahaaha: Smile | :)

Chris Meech

We're more like a hobbiest in a Home Depot drooling at all the shiny power tools, rather than a craftsman that makes the chair to an exacting level of comfort by measuring the customer's butt. Marc Clifton

VB is like a toolbox, in the hands of a craftsman, you can end up with some amazing stuff, but without the skills to use it right you end up with Homer Simpson's attempt at building a barbeque or his attempt at a Spice rack. Michael P. Butler

Compiling C++ in .NET 2003

PaleyX5-May-04 13:52

PaleyX

5-May-04 13:52

I have just compiled an old VC6 project in VS.NET 2003 and I am getting some odd errors. It's been a while since I did any C++ and am a bit rusty so any help would be appreciated.

In the following code:

template<class T> class COpList <br />
{<br />
public:<br />
<br />
	COpList();  <br />
	~COpList();<br />
<br />
	bool ParseList(CTokenizer&);<br />
	void StartIterator(void) const;<br />
	const T* GetOp(void) const;<br />
<br />
	void Display(ostream&) const;<br />
	string GetAsText(void) const;<br />
<br />
private:<br />
<br />
	void AddOpListElement(const string&);<br />
<br />
	typedef vector<T*> OPVEC;<br />
	OPVEC m_vecOpList;<br />
	mutable vector<T*>::const_iterator m_it;<br />
};

The last line in the class (in bold) is giving the error:

error C2146: syntax error : missing ';' before identifier 'm_it'<br />

What is it telling me? I have looked it up in help and it seems to have something to do with specialisation but, as I say, I am kinda rusty on C++. Any help would be appreciated.

Thanks

Paley.

Rugby League: The Greatest Game Of All.

Re: Compiling C++ in .NET 2003

Antony M Kancidrowski6-May-04 4:55

Antony M Kancidrowski

6-May-04 4:55

Have you got an #include <vector> at the top of the .h file?

Ant.

Re: Compiling C++ in .NET 2003

PaleyX6-May-04 5:09

PaleyX

6-May-04 5:09

Yes, sorry I forgot to include it in my post.

Microsoft have tightened up on C++ compatability in VS.NET so I think it is something to do with that, in particular specialisation in templates. I wrote this stuff a few years ago (it's a programming language compiler/interpreter) and haven't been keeping up to date so if anybody can point me in the right direction as to why this is happening it will be appreciated.

Rugby League: The Greatest Game Of All.

Re: Compiling C++ in .NET 2003

Navin6-May-04 6:19

Navin

6-May-04 6:19

Along the lines of the other post:

Have you tried replacing your vectors with std::vector? Or are you using namespace std; ?

"Fish and guests stink in three days." - Benjamin Franlkin

Re: Compiling C++ in .NET 2003

PaleyX6-May-04 6:23

PaleyX

6-May-04 6:23

I have using namespace std;

It compiles fine in VC6 - the issue is to do with template specialisation although I am not using it.

Rugby League: The Greatest Game Of All.

Re: Compiling C++ in .NET 2003

Phil J Pearson6-May-04 6:37

Phil J Pearson

6-May-04 6:37

Change the line to

mutable typename vector<T*>::const_iterator m_it;

The opinions expressed in this communication do not necessarily represent those of the author (especially if you find them impolite, discourteous or inflammatory).

Re: Compiling C++ in .NET 2003

PaleyX6-May-04 6:47

PaleyX

6-May-04 6:47

Excellent, that works a treat, thank you very much.

Can I ask why it work?

Rugby League: The Greatest Game Of All.

Re: Compiling C++ in .NET 2003

Phil J Pearson6-May-04 6:49

Phil J Pearson

6-May-04 6:49

"The typename keyword is required if a dependent name is to be treated as a type. This is a breaking change in the Visual C++ .NET 2003 compiler, made in order to conform to the ISO C++ standard."

The opinions expressed in this communication do not necessarily represent those of the author (especially if you find them impolite, discourteous or inflammatory).

Re: Compiling C++ in .NET 2003

PaleyX6-May-04 6:51

PaleyX

6-May-04 6:51

Thanks, you have been a big help.

Rugby League: The Greatest Game Of All.

Re: Compiling C++ in .NET 2003

Steve S6-May-04 22:36

Steve S

6-May-04 22:36

IIRC, this also affected the WTL 7.0 source, specifically the printing stuff, so Nenad had to change the code in exactly the same way. Nice to know that MS get caught out just like us mortals.... Wink | ;)

Steve S

Simple Input Box

hypersphere5-May-04 12:36

hypersphere

5-May-04 12:36

I'm creating a Time Series Viewer, an I'd like to let the user chose the path he wants (where he has his data).

The problem is I'm not used to MFC, and I'd like to know if there is a way to avoid creating a complicated dialog box.

If I am to do it, how do I include it to my other project, that's to say: how do I tell my main project to call this dialog box when I want it to do so, and how do I get the input in memory to use it?

Thanks

Re: Simple Input Box

Antony M Kancidrowski6-May-04 5:07

Antony M Kancidrowski

6-May-04 5:07

You can use CFileDialog()

Here is a link to the MSDN
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_wcemfc4/html/aflrfCFileDialogcolcolCFileDialog.asp[^]

Ant.

Re: Simple Input Box

hypersphere6-May-04 5:13

hypersphere

6-May-04 5:13

Thanks a lot

WM_MENUDRAG Problem.

Iain Clarke, Warrior Programmer5-May-04 12:16

Iain Clarke, Warrior Programmer

5-May-04 12:16

I have a small problem...
...and suggesting pills off the internet will earn a slapping!

I can setup a draggable menu, and respond to the WM_MENUDRAG message just fine.
I can even do a DoDragDrop and drag menu items to (e.g.) a toolbar.

But the menu is still there!

What I want to do is to dismiss the menu as soon as the dragging operation
starts (which I should be able to do responding to the WM_MENUDRAG message)
so I can drag to a toolbar covered up by the menu.

I know this is a pedantic niggle, but its been bugging me for ages!

If this is too vague, I'll upload a zipped mini-project and post a URL in
the morning. There's a bit too much code involved to just post here...

Any hints / pointers / examples appreciated,

Iain.

Re: WM_MENUDRAG Problem.

Roger Allen6-May-04 4:12

Roger Allen

6-May-04 4:12

I helped with a similar problem on CG a while back. You can do it like this:

Use SetFocus() on a different control
Use SendInput() and set the dwFlags input to MOUSEEVENTF_LEFTDOWN
Use PostMessage(WM_LBUTTONDOWN, 0, 0)
Use WM_CANCELMODE

The original thread is http://www.codeguru.com/forum/showthread.php?s=&threadid=291063[^]

Roger Allen - Sonork 100.10016
Strong Sad:
Clever I am? Next to no one.
Undiscovered and soggy.
Look up. Look down. They're around.
Probably laughing. Still, bright, watery.
Listed among the top. Ten.
Nine. Late night. Early morn.
Early mourn. Now I sleep.

Re: WM_MENUDRAG Problem.

Iain Clarke, Warrior Programmer6-May-04 5:13

Iain Clarke, Warrior Programmer

6-May-04 5:13

Thanks for your help Roger. I'm dealing with the MainFrame menu rather than a TrackMenuPopup one,
but that shouldn't make any great difference. I'll have a play and see what's going on.

Going to Brussels in Sept?

Iain.

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