C / C++ / MFC Discussion Boards

Re: Need HELP - Linking DLL with TEMPLATE

Joaquín M López Muñoz21-Mar-02 8:23

Joaquín M López Muñoz

21-Mar-02 8:23

Please check these two things:

The header demo.h must read __declspec(dllexport) when building the DLL and __declspec(dllimport) when using it in the program test.cpp. I guess you already knew that and didn't bother to specify in your post. The standard technique to have this done is with some macro hackery.

Provided the first point is not the issue, then maybe you're having problems explicitly instantiating the functions. Try forcing an implicit instantiation:

void __declspec(dllexport) dummy()
{
  // a dummy function intended to instantiate the functions.
  // declared as __declspec(dllexport) to make sure the linker will not
  // strip it off as it's not actually used.
 
  typedef ListeChaineSimple<int> LCS_int;
  LCS_int liste:
  int n;
  ofstream ofs("quelque chose");
  ofs<<liste;
  liste<<n;
  liste>>n;
}

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

bmp on a dialog

20-Mar-02 3:25

can anybody tell me if there's a way to insert a bmp as a background for a dialog, i can make a pic control and stretch it to fit the dialog and insert the bmp on it, but i was wondering if there's another way, thanks in advance....
OMG | :OMG:

Re: bmp on a dialog

Rickard Andersson²⁰20-Mar-02 3:31

Rickard Andersson²⁰

20-Mar-02 3:31

Handle WM_ERASEBKGND

------------------------------------
Rickard Andersson, Suza Computing
ICQ#: 50302279
I'm from the winter country SWEDEN!

------------------------------------

Re: bmp on a dialog

dlhson20-Mar-02 6:51

dlhson

20-Mar-02 6:51

You can also handle WM_CTLCOLOR
Ex: You have a bitmap resource as IDB_BITMAP1

1. In OnInitDialog(), use the code:
CBitmap bm;
bm.LoadBitmap(IDB_BITMAP1);
m_brush.CreatePatternBrush(&bm);
bm.DeleteObject();
with m_brush is member variable of Your dialog class

2. Handle WM_CTLCOLOR (not return hbr)

pDC->SetBkMode(TRANSPARENT);
return m_brush;
//return hbr;

3. Destroy m_brush in DestroyWindow()

Good luck Big Grin | :-D

Hung Son

illegal vtable pointer

albean20-Mar-02 3:23

albean

20-Mar-02 3:23

I've run out of ideas trying to track this problem down. Frown | :(

I've created a template class and have a private member variable called m_MSGList.

typedef CTypedPtrList<CPtrList, MSG*> tplMSG;
template <class T> class CD : public CWinThread
{
.
.
.
private:

tplMSG m_MSGList;

}

--------------------------------
When this line of code executes:

m_MSGList.AddTail(pmsg);

I get:
ASSERT_VALID fails with illegal vtable pointer.
--------------------------------

help.

Re: illegal vtable pointer

albean20-Mar-02 5:27

albean

20-Mar-02 5:27

Found the problem. Right above m_MSGList i declared an array. in the constructor i overwrote the array.

I knew something like that was going on. It just took a coffe break and a fresh start to figure it out.

executing older version application in new version

Bhikshapathi Gorantla20-Mar-02 3:13

Bhikshapathi Gorantla

20-Mar-02 3:13

Hi I have an application containing server and client.It is older version and I converted into new version.But one .lib file is missing.The link error I got is
LINK : fatal error LNK1104: cannot open file "D:\pathi\RTDesk\RTdesk\RTdesk\RemoteDesktopViewer_server\debug\zipdbg.lib"

How can I fix this problem and execute the server and client?
Please help me.

Regards
Pathi Smile | :)

Pathi

Re: executing older version application in new version

Bill Wilson20-Mar-02 6:59

Bill Wilson

20-Mar-02 6:59

The only solution is the obvious one, add the library that is missing.

Re: executing older version application in new version

Bhikshapathi Gorantla20-Mar-02 18:28

Bhikshapathi Gorantla

20-Mar-02 18:28

But I dont have that library.I got this application from my
friend who got it from net.When I opened it asked for whether to convert it to new version of developer studio and I pressed "ok".When I compiled no problems but getting the error while building.Do I need to change any project seettings or what are the options to remove the error?

Thank you.

Pathi

Re: executing older version application in new version

Bill Wilson21-Mar-02 5:25

Bill Wilson

21-Mar-02 5:25

Try contacting the author.

IPicture Render Embedded

Braulio Dez20-Mar-02 3:03

Braulio Dez

20-Mar-02 3:03

Hi,

I´m trying to show one ActiveX that contains an IPicture that shows an Enhanced metafile...

This don´t works if I have it embedded in Ms Word, any idea why is this ? Does IPicture Render don´t work, when it´s in design mode ? ( DT_METAFILE), I have had even problems with the normal mode Frown | :-(

Please help, Thanks !
Braulio

VisualStudio won't auto re-open files

Steve Kearon20-Mar-02 2:51

Steve Kearon

20-Mar-02 2:51

I've just upgraded from VC++5 on one system to VC++6 on a different system.
Moving a 3-project workspace was painless except that the IDE won't now
remember what files were open & automatically re-open them when I next
restart VisualStudio or re-open the workspace.

I've checked Tools/Options/Workspace tab, and have both "reload last
workspace at startup" and "reload documents when opening workspace" checked,
but only the first of these has any effect.

Any ideas?

Re: VisualStudio won't auto re-open files

20-Mar-02 3:07

try delete/move all not necessary binaries
(means all opt ncb and similars, except sources, dsp, dsw)
and try again
t!

Udp broadcast alternative? Maybe multicast?

20-Mar-02 2:51

I am searching for a way to do a one-to-many data broadcast on internet, but since most routers have digestion problems with UDP broadcast i am looking for alternative. I have encountered multicast, but i dont know how covered is internet with multicast enabled routers...

Does someone know for any alternative? Central server is not an option.

Custom control

kortebi20-Mar-02 2:38

kortebi

20-Mar-02 2:38

Hi,

I a beginner VC++ programmer,
What are the step to folow to add a custom control to a dialog ?

thanks

Re: Custom control

dlhson20-Mar-02 6:01

dlhson

20-Mar-02 6:01

1. If it's a ActiveX, just select and drag it to dialog
2. If you have a define class of it, add to project.
After that, use functions of this class to create control.;) Wink | ;)

Hung Son

displaying a Bitmap FULL screen

kortebi20-Mar-02 2:37

kortebi

20-Mar-02 2:37

How can display a Bitmap image on FULL screen using MFC ?

Thanks

Re: displaying a Bitmap FULL screen

Jon Hulatt20-Mar-02 5:03

Jon Hulatt

20-Mar-02 5:03

GetDC(NULL) will get a DC for the entire screen. You can then draw on to that DC in the normal way.

Sorry to dissapoint you all with my lack of a witty or poignant signature.

Using derived CListCtrl in CListView

20-Mar-02 2:13

How do you make to use derived CListCtrl (for example CListCtrEx) into CListView with CListView::GetListCtrl() call.

Re: Using derived CListCtrl in CListView

JT Anderson20-Mar-02 4:37

JT Anderson

20-Mar-02 4:37

One way is to use CView instead of CListView. Derive a class from CView that has a CListCtrEx as a member variable. Create the CListCtrEx window as a child of the CView window in OnCreate (or OnInitialUpdate) in your CView derived class. Handle OnSize in your CView derived class to resize the CListCtrEx window to the client area of the CView window. Implement GetListCtrl in your CView derived class to return a reference to the CListCtrEx member.

Detecting Printer Types

jerry0davis20-Mar-02 1:53

jerry0davis

20-Mar-02 1:53

When I enumerate all my network printers, I also get the Acrobat Distiller, and Microsoft Fax. Is there any way of telling the difference between actual hardware printers, and software versions? Thanks.

Jeremy Davis
http://www.astad.org

waiting for a thread to finish creating

20-Mar-02 1:30

Hi,

I've seen others putting in a sleep statment after a call to CreateThread(). They claim that you need to wait while the thread starts. This sort of makes sense but I can't find anything to confirm this in MSDN. I was wondering what you guys have to say on this subject. Here is what I've seen others do:

thread->CreateThread();
Sleep(750);
thread->PostThreadMessage(UWM_MY_MSG, 0, (LPARAM)info);

Do you need the Sleep statment? In my program it seems to work w/o it but i don't want it to crash when its released. 750 seems like a long time to wait if do have to wait. what is the shortest time you should wait (if you do)?

Re: waiting for a thread to finish creating

Nish Nishant20-Mar-02 1:47

Nish Nishant

20-Mar-02 1:47

I dont think you need the Sleep in between unless you are doing some UI stuff. If so you'd prolly wanna make sure that the window is created and on screen before trying to do fancy stuff on it. But even for that using Sleep is a stupid approach. You can set some kinda event or some other such sync object that you can WaitForSingleObject on

Nish

My miniputt high is now 29
I do not think I can improve on that
My temperament won't hold

www.busterboy.org

Re: waiting for a thread to finish creating

Daniel Turini20-Mar-02 1:49

Daniel Turini

20-Mar-02 1:49

As a rule of thumb, I would use an event object to signal the thread creation at start of ThreadProc, remove the Sleep and use a WaitForSingleObject.

750 ms is too much time to spend in some ocasions. But, if the machine is at 100% CPU, with lots of processes running in a slow machine, it may not be sufficient.

Crivo
Automated Credit Assessment

Re: waiting for a thread to finish creating

Carlos Antollini20-Mar-02 2:20

Carlos Antollini

20-Mar-02 2:20

Use waitforsingleobject or with the threadID you can Know the status of the Thread, of is is running or not....
But if CreateThread returns valid Handle is because the Thread was created.... Wink | ;)

Regards...

Carlos Antollini.
Sonork ID 100.10529 cantollini

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.