C / C++ / MFC Discussion Boards

Re: Win32 API : Which #include do I need ?

Steve S8-Oct-02 4:51

8-Oct-02 4:51

If you have VC++6 or a recent-ish Platform SDK, there is a WIN32API.CSV file which tells you exactly this in the LIB directory.

Normally, you would start with <windows.h>, optionally defining stuff like WIN32_LEAN_AND_MEAN to remove stuff. There are lots of other defines you can do to suppress the inclusion/definition of various Win32 subsystems.

Steve S
[This signature space available for rent]

Re: Win32 API : Which #include do I need ?

Stephane Rodriguez.8-Oct-02 4:55

Stephane Rodriguez.

8-Oct-02 4:55

Launch VC6, and use the Win32 application classwizard to create a project with all the things that you need. It includes windows.h in stdafx.h

She's so dirty, she threw a boomerang and it wouldn't even come back.

Re: Win32 API : Which #include do I need ?

Max Santos8-Oct-02 5:57

Max Santos

8-Oct-02 5:57

If you look at the MSDN and find the ShellExecuteEx function you will have this on the botom of the page (this is a very usefull piece of information)

Function Information

Stock Implementation shell32.dll version 4.00 or later
Custom Implementation No
Header shellapi.h
Import library shell32.lib
Minimum operating systems Windows NT 4.0, Windows 95

Casa.Sapo.pt

Re: Win32 API : Which #include do I need ?

Jerome Conus8-Oct-02 19:15

Jerome Conus

8-Oct-02 19:15

Thank you for your informations !

This is something I never understood with my MSDN. For plenty of function, I get the useful informations you mentionned in your post, but for the ShellExecuteEx, and for some others, I don't get the usual layout of functions description. What I get is a page called 'Internet Tools & Technologies', without these useful informations I was looking for !

Anyway, thanks again for your help !
Jerome

GetWindowText

ns8-Oct-02 4:05

8-Oct-02 4:05

I have a CString which I pass into:

m_editExerciseName.GetWindowText(m_ExerciseName);

However MSDN says

void GetWindowText( CString& rString ) const;

Its & rString the & that is bothering me> How should I change my GetWindowText statement so that a & goes in?
I declared m_ExerciseName as a plain old CString.

Appreciate your help,
ns

Re: GetWindowText

Joaquín M López Muñoz8-Oct-02 4:11

Joaquín M López Muñoz

8-Oct-02 4:11

Your code as it shows should compile and run OK. Do a search for "references" on any C++ tutorial to know more about the & character.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

thanks

ns8-Oct-02 4:45

8-Oct-02 4:45

Good to know. I guess I am off to look into & now. Smile | :)

Appreciate your help,
ns

Re: GetWindowText

Ranjan Banerji8-Oct-02 4:17

Ranjan Banerji

8-Oct-02 4:17

void GetWindowText( CString& rString ) const; implies that the function it self will not change any data that belongs to the CWindow class. Your code will work fine.

Combo Box: I want to catch user changes once he/she is finished

Le centriste8-Oct-02 3:54

Le centriste

8-Oct-02 3:54

I would like to catch user changes on a combo, but only once he is finished typing. How could I do that?

NOTE: CBN_EDITCHANGE don't work. In fact, it is called every time the user types something in the edit, and CBN_SELCHANGED is only called when the user selects an item in the list.

Michel

It is a lovely language, but it takes a very long time to say anything in it, because we do not say anything in it, unless it is worth taking a very long time to say, and to listen to.

- TreeBeard

Re: Combo Box: I want to catch user changes once he/she is finished

Chris Hambleton8-Oct-02 4:18

Chris Hambleton

8-Oct-02 4:18

Try catching the killfocus event of the combobox -- when the cursor leaves the control, you can assume they're done with it.

"If at any time I announce that a nation or kingdom is to be uprooted, torn down and destroyed, and if that nation I warned repents of its evil, then I will relent and not inflict on it the disaster I had planned. And if at another time I announce that a nation or kingdom is to be built up and planted, and if it does evil in my sight and does not obey me, then I will reconsider the good I had intended to do for it." -- Jeremiah 18:7-10 (God, commenting on the value of the United Nations)

Re: Combo Box: I want to catch user changes once he/she is finished

valikac8-Oct-02 10:01

valikac

8-Oct-02 10:01

Consider CBN_DROPDOWN event handler.

Kuphryn

enter should tab

ns8-Oct-02 3:53

8-Oct-02 3:53

My CDialog has two editboxes. I want the Enter key to tab from one box to the other. How would I do this?

Appreciate your help,
ns

Re: enter should tab

Chris Hambleton8-Oct-02 4:31

Chris Hambleton

8-Oct-02 4:31

Override the BOOL CMyXxx::PreTranslateMessage(MSG* pMsg) handler and then try something like:

if (pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_RETURN)
{
if(pMsg->hWnd == m_edit1.GetSafeHwnd())
m_edit2.SetFocus();
else if(pMsg->hWnd == m_edit2.GetSafeHwnd())
m_edit1.SetFocus();

return CXxxx::PreTranslateMessage(pMsg);
}

"If at any time I announce that a nation or kingdom is to be uprooted, torn down and destroyed, and if that nation I warned repents of its evil, then I will relent and not inflict on it the disaster I had planned. And if at another time I announce that a nation or kingdom is to be built up and planted, and if it does evil in my sight and does not obey me, then I will reconsider the good I had intended to do for it." -- Jeremiah 18:7-10 (God, commenting on the value of the United Nations)

Thank you!

ns8-Oct-02 4:44

8-Oct-02 4:44

So thats how its done! MAny thanks.

Appreciate your help,
ns

Re: enter should tab

ns8-Oct-02 7:29

8-Oct-02 7:29

I get this warning:

C:\DbInput.cpp(72) : warning C4715: 'CDbInput::PreTranslateMessage' : not all control paths return a value

for the code you gave me above> how can I fix this warning?

Appreciate your help,
ns

Re: enter should tab

Roger Allen9-Oct-02 2:02

Roger Allen

9-Oct-02 2:02

This is even easier:

BOOL CYourClass::PreTranslateMessage(MSG* pMsg) 
{
	if (pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_RETURN)		
		{
		// only change the function of the enter key when focus is not on a button
		CWnd *pWnd = GetFocus() ;
		CButton *pButton = static_cast<CButton*>(pWnd) ;
		if (pButton == NULL)
			pMsg->wParam = VK_TAB ;
		}
	
	return CDialog::PreTranslateMessage(pMsg);
}

Roger Allen
Sonork 100.10016

I think I need a new quote, I am on the prowl, so look out for a soft cute furry looking animal, which is really a Hippo in disguise. Its probably me.

Strange exception ....

Shay Harel8-Oct-02 3:46

Shay Harel

8-Oct-02 3:46

Hi !

I am using MSFlexGrid on one of my dialogs. When I run the program on my PC it runs OK, but when I run it on a PC that does not have the developer studio on it it will crash with :

Debug assertion fail on "winocc.cpp line 301"

When I went to this file, this is the function it runs

BOOL CWnd::ShowWindow(int nCmdShow)<br />
{<br />
	ASSERT(::IsWindow(m_hWnd));<----This is line 301<br />
<br />
	if (m_pCtrlSite == NULL)<br />
		return ::ShowWindow(m_hWnd, nCmdShow);<br />
	else<br />
		return m_pCtrlSite->ShowWindow(nCmdShow);<br />
}

I tried to copy the msflxgrd.ocx file to this PC and still no help.
To active the window with the flex grid, I use from the main dialog this sequance:

ctst *y=new ctst;<br />
y->Create(IDD_DIALOG1,this);<br />
y->ShowWindow(SW_SHOWNORMAL);

So aperantly it fails on the ShowWindow,

But why ???????????????????//

Re: Strange exception ....

Jon Hulatt8-Oct-02 4:06

Jon Hulatt

8-Oct-02 4:06

Did you register the ocx ?

Signature space for rent. Apply by email to....

Re: Strange exception ....

Adam Gardner8-Oct-02 4:46

Adam Gardner

8-Oct-02 4:46

Some controls bundled with Visual Studio, though redistributable, still require a runtime license (and MSFlexGrid.ocx is one of them). I encountered a similar problem before I used the IClassFactory2 interface to request a runtime license for the FlexGrid. Look into this. If you need some help with the coding of this let me know.

The following link might help you get started:

http://support.microsoft.com/default.aspx?scid=kb;en-us;Q151771

Adam

Adam Gardner

Re: Strange exception ....

Shay Harel8-Oct-02 5:46

Shay Harel

8-Oct-02 5:46

Thank you for the answer.

I decided not to take the risk, since my code is going to be distributed over few different Windows platforms. I will try to use the ListCtrl as much as I can.

Shay

Re: Strange exception ....

JohnnyG9-Oct-02 4:51

JohnnyG

9-Oct-02 4:51

I'm having the same problem as I'm using the flexgrid control. I've looked up your link and requested the license but now I'm not sure how to implment it. I've read something about having to embed it into the executable but how/where? Do, I have to override GetLicenseKey() or some other function in the flex grid control?

If you have some code on how to do this, I would really appreciate it. Thanks.

c++-izing C code ...

Maximilien8-Oct-02 3:15

Maximilien

8-Oct-02 3:15

I'm trying to clean up some C code and eventually transform, port and adapt it to be more and more C++ and more importantly object oriented.

Is there some documentation that talks about this kind of thing?

The biggest problem is the use of global variables, defines, enums,typedefs and structs. Is using namespace to contain those globals a good idea ? at least before objectifying the code ?

Thanks

Max.

Re: c++-izing C code ...

Navin8-Oct-02 3:43

Navin

8-Oct-02 3:43

If I were you, I'd recommend looking at "The Big Picture". In other words, do a design - see what classes your code should have, and how they should interface to each other. Global variables may end up member variables of a class... or perhaps static member variables. Global functions may turn into member functions.

Namespaces can help control name conflicts.. but chances are you are better off figuring out what classes each of these things should go to. Generally, static member functions and variables can achieve the same things as global variables, but in a much nicer way.

"Time spent with cats is never wasted." - Colette

Re: c++-izing C code ...

Joe Woodbury8-Oct-02 6:33

Joe Woodbury

8-Oct-02 6:33

I concur.

I've often simply compiled 'C' code using the C++ compiler, but if I want to change it significantly, I find its usually better to back off and look at, as Navin suggested, "The Big Picture."

When I've rewritten old 'C' code, the improvement is almost always more dramatic than even I expected at first.

HTTP download

kashifkhwaja8-Oct-02 2:50

kashifkhwaja

8-Oct-02 2:50

1) I want to programatically download a file from http server. Is there any API available or any other method/article you know ????

2) I want to resume the download if not completed successfully in previous attempt! Any idea about this ???

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