C / C++ / MFC Discussion Boards

Re: Win32 programming, where to start?

_Magnus_3-Jul-02 4:52

_Magnus_

3-Jul-02 4:52

"programming windows 95" (not sure about the title)
by charlez petzold (not sure bout the spelling Smile | :)

)
might be a good book.

But i would suggest you look at WTL instead, it is a lightwight
framework for the win32 api. (or for the windowing part at least)

/Magnus

- A dog who attends a flea circus most likely will steal the whole show

Re: Win32 programming, where to start?

generic_user_id3-Jul-02 5:11

generic_user_id

3-Jul-02 5:11

Thanks, I'll check it out.

Re: Win32 programming, where to start?

Michael P Butler3-Jul-02 5:11

Michael P Butler

3-Jul-02 5:11

I think you might be better looking into WTL first before moving to straight Win32 API. WTL is a much smaller and cleaner framework than MFC.

The Charles Petzold book will give you a good grounding in Win32 programming. Not sure of the current title as my copy is Programming Windows 3.1

Michael Smile | :)

Logic, my dear Zoe, merely enables one to be wrong with authority. - The Doctor

Re: Win32 programming, where to start?

generic_user_id3-Jul-02 5:55

generic_user_id

3-Jul-02 5:55

Would you happen to know any good books which cover the WTL basics then?

Re: Win32 programming, where to start?

Ravi Bhavnani3-Jul-02 5:17

Ravi Bhavnani

3-Jul-02 5:17

The Petzold book is an excellent tutorial. Btw, you can (and should!) continue to use classes.

/ravi

Let's put "civil" back into "civilization"
http://www.ravib.com
ravib@ravib.com

Re: Win32 programming, where to start?

generic_user_id3-Jul-02 5:28

generic_user_id

3-Jul-02 5:28

Thanks, I'll see if I can find it.

Oh.. and I didn't want to stop using classes, only the CString, CDialog, and those are the ones I wasn't particually fond of.

Re: Win32 programming, where to start?

Michael P Butler3-Jul-02 5:35

Michael P Butler

3-Jul-02 5:35

STL will handle the string classes using std::string. WTL will give you a nice thin framework for CDialog.

You could write your own framework, do a search for Windows++ for an example.

Michael Smile | :)

Logic, my dear Zoe, merely enables one to be wrong with authority. - The Doctor

Re: Win32 programming, where to start?

Jeremy Falcon3-Jul-02 6:03

Jeremy Falcon

3-Jul-02 6:03

I've read "Win32 Programming" by Brent Rector and Joseph M. Newcomer. It's an excellent read and a great reference book. My copy started to fall apart because I used it so much when learning pure Win32 programming.

Also, Joseph is a registered CPian and well-respected programmer. Take a look at some of his articles to see the quality of his work. This is also reflected in the book.

Jeremy L. Falcon<nobr>
Homepage : Sonork = 100.16311

"Victims falling under chains ~ You hear them crying dying pains
The fist of terrors breaking through ~ Now there's nothing you can do"
Song: Phantom Lord - Album: Kill 'em All - Artist: Metallica

Handle

3-Jul-02 4:47

How can I obtain the handle to a disabled control(button) in one application and enable it from another application.

Thanks

Re: Handle

wabc3-Jul-02 14:54

wabc

3-Jul-02 14:54

use FindWindow function to get the handle of your control,then you can do what you want on that control.

CTRL+Z and Edit Controls

Braulio Dez3-Jul-02 4:47

Braulio Dez

3-Jul-02 4:47

Hi,

My application handles the CTRL+Z/Y to make my "undo/redo" stuff, but I´m having problems, when the focus is ( for example), in an edit control, then I don´t get that message ( the edit control handles it), is there anyway to aviod that ( without use the bag of problems called PreTranslateMessage...).

Thanks in advance, Greetings
Braulio

Addin load problem

Zizilamoroso3-Jul-02 4:36

Zizilamoroso

3-Jul-02 4:36

I've followed the tutorial about creating office addin's. The one I've created is an excel addin. It doesn't do anything, it's just a minimal addin.

But it doesn't show up in the excel addin-list, even though it's registered in windows registry.

The loadbehaviour should be set to 3 for automatic loading.
After compiling the project, using regedit shows 3 for loadbehaviour. So far so good.

But after running excel, eyeballing the addin is not there, the loadbehaviour in regedit changed to 2 ??????

What's going on here?

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Changing Static Text Font

Dan Broomall3-Jul-02 3:54

Dan Broomall

3-Jul-02 3:54

I am a little embarrased having to ask about this, but I have a need to change the font size/style of a static text field and I can't remember how to do it. My old code library is at my last job and I don't have access to it anymore. Is there anyone out there with a lead on where I might go to quickly solve this problem? Thanks for any help you can give!

Dan Broomall
GIS Programmer/Analyst

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
- Albert Einstein

Re: Changing Static Text Font

Michael P Butler3-Jul-02 4:12

Michael P Butler

3-Jul-02 4:12

I'd recommend Norm's CLabel control. http://www.codeproject.com/staticctrl/clabel.asp

Top control.

Michael Smile | :)

Logic, my dear Zoe, merely enables one to be wrong with authority. - The Doctor

Re: Changing Static Text Font

benjymous3-Jul-02 5:45

benjymous

3-Jul-02 5:45

You can change the font for the whole dialog by bringing up the properties for the window in the dialog editor. This font will be used by everything else on the dialog too, though

--
Help me! I'm turning into a grapefruit!

trying to disable a menu item in an MDI

ns3-Jul-02 3:45

3-Jul-02 3:45

I got from the MSDN this snippet about enabling/disabling menus. I put it in a button click event (for starters). I got a debug /assert. Where should it go?
Please let me know.
Thanks,
ns

In the real project its supposed to happen after a successful login from a modal dlg box spawned off an MDI CFormView form:

In a doc menu click event:

{
CMyDialog cMyDlg;
int ret = cMyDlg.DoModal();

If (ret==5)
{
CMenu* mmenu = GetMenu();
CMenu* submenu = mmenu->GetSubMenu(0);
submenu->EnableMenuItem(ID_FILE_NEW, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);
}
}

Re: trying to disable a menu item in an MDI

Mike Upton5-Jul-02 2:56

Mike Upton

5-Jul-02 2:56

I suspect you're running into a null pointer problem. If this code is in the CFormView object, GetMenu() will return NULL because the menu doesn't actually belong to the view, or even to the view's parent frame. The application's menu belongs to the main frame, so you need to do this instead:
CMenu* mmenu = AfxGetMainWnd()->GetMenu();

But if I were you, I wouldn't do it that way anyway. I'd add a member variable to your document class, which you would set when you did the login. Then, add an update handler to your document class for ID_FILE_NEW (the easiest way to do that is via ClassWizard), and enable or disable the menu item based on that member variable:

CMyDocument::OnUpdateFileNew(CCmdUI* pCmdUI)
{
  pCmdUI->Enable(m_bLoginOk);
}

That way, if you had a toolbar button for file new, that would also be enabled or disabled correctly.

"We are the knights who say Ni" _{(The Knights Who Say Ni)}

Re: trying to disable a menu item in an MDI

ns5-Jul-02 3:08

5-Jul-02 3:08

Thanks. Thats what I ended up doing . Didnt know the tooolbar button would follow suit though...
many thanks.;)

combining MFC and callback function

3-Jul-02 3:40

Hello,

I have a little experience in MFC, but almost none in Win32 programming and callback functions.

I am working on a dialog based MFC project and need to use some third party stuff that require a callback function. I have no idea how to move on. Where should I declare the callback function? It should be stand alone and not belongs to any class, right? Is it possible to handle the callback like a message handler in the MFC way? Any help or quick pointer to useful resources would b appreciate.

By the way, any good online resource about the basic of callback function? All the stuff I have found seem too advance to me Frown | :(

Re: combining MFC and callback function

_Magnus_3-Jul-02 3:46

_Magnus_

3-Jul-02 3:46

You need to know what prototype it should be, then
you either declare it global or as a static class member.

returntype CallbackFn(params)
{
// Handle stuff in here.
}

Then you use 'CallbackFn' as param where te 3'rd party lib wants
a callback function.

/Magnus

Re: combining MFC and callback function

3-Jul-02 21:52

Its (somewhere) in the MSDN, an example of a function in a class as a callback function for Multi-threading. First, create a separate function that is "static" (for thread use, UINT <funcname> (LPVOID)):

class MyClass
{
..
// Callback Function
static UINT MyCallBackFunc (LPVOID lpData);
// Actual Function
void MyFunction ();
..
}

UINT MyClass::MyCallBackFunc (LPVOID lpData)
{
MyClass *pMC = (MyClass *) lpData;
if (pMC)
pMC->MyFunction ();
}

// Use of the callback function - AfxBeginThread is a member of CWinThread
..
AfxBeginThread (0, MyCallBackFunc, this);
..

when assigning the callback function, use the MyCallBackFunc passing the instance of the class as the parameter.

this is just an example to give you an idea; better look for the actual code (I'm not 100% sure with this one. gud luck.

file /open dialog filter in MDI

ns3-Jul-02 3:24

3-Jul-02 3:24

I edited the string in the string resource of my MDI project. In the fourth (tried the 5th place too) place I put \nCoin Project (*.coi), which according to my example should have opened the file/open dialog with a filter of *.coi. However it always says All File (*.*).

ANy suggestions? Is there a direct way by code we can do this?
Thanks in advance,
ns

Declaring function that throw exceptions

Alexandru Savescu3-Jul-02 3:07

Alexandru Savescu

3-Jul-02 3:07

I believe that, in C++, if a function may throw an exception, you should declare it like this:

<br />
int myfunc() throw (CMyException);<br />

The problem is that VC (even .NET) issues a warning that it disregards my declaration as the ANSI standard is not very specific when using functions that throw exceptions. In fact, I think the function may very well throw an exception of another type, not the one declared.

The question is:
Do you decorate your function declarations with an exception specification or don't bother since it does not matter. Why? Because it is good design? Also, if you do, do you use the throw (CMyException) both in the header and the implementation file?

Best regards,
Alexandru Savescu

Re: Declaring function that throw exceptions

Orbital^3-Jul-02 3:27

Orbital^

3-Jul-02 3:27

The function my thow any other exception, but if it do so your aplication will be terminated because the 'unexpected' handler will be called witch by default call 'terminate'. To set your own handler you can call 'set_unexpected()'.
For a more deep perspectiv on exception you can see "Deep C++" in MSDN

Bye,
Orbital^

...the night is long ... but not long enought to do some real coding ...

Re: Declaring function that throw exceptions

Alexandru Savescu3-Jul-02 3:32

Alexandru Savescu

3-Jul-02 3:32

Are you saying that if I do:

void f () throw (MyException)
{
  throw OtherException();
}

//and then

void g()
{
  try
  {
    f();
  }
  catch (MyException)
  {
  }
  catch (OtherExcepion)
  {
  }
}

my application will be terminated. I doubt it!

Best regards,
Alexandru Savescu

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