C / C++ / MFC Discussion Boards

Iain Clarke, Warrior Programmer23-Jul-03 0:37

23-Jul-03 0:37

richiehere wrote:
First of all, thanks for all the 'activity' being generated on this thread!

You're welcome. It beats real work (which I should be doing...) and is more satisfying
than answering the "please do all my (home)work for me" questions that have been
reappearing.

I'll make an assumption that you have two projects in your workspace. B.DLL subproject,
and C.EXE project that depends on the DLL.

I would *strongly* suspect you are exposing A.LIB to to C.EXE, so it ends up linking
to A.LIB too. Make sure that the exe does not include any of the headers associated
with A.LIB, even implicitly.

I'd bet you have a B.H file with the definitions from B.DLL that includes A.H. If B.H
exposes any functions / classes that are not fully implemented in B.DLL, than C.EXE
will need to link them from somewhere, or it will give errors...

Its hard to be more specific without actually seeing your projects, so I'm having to
be general here.

Iain.

Re: DLL and Static Library Doubt

Ryan Binns22-Jul-03 23:46

Ryan Binns

22-Jul-03 23:46

No, you don't need to distribute A.lib.

The library is needed by the linker to work out how to implement the calls to functions inside the DLL. It is not needed to use D.dll, and therefore doesn't need to be distributed.

Hope this helps,

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: DLL and Static Library Doubt

Toni7822-Jul-03 23:58

Toni78

22-Jul-03 23:58

This is what richiehere wrote:
"I was quite aware that while shipping the 'exe', I dont need to ship the lib file.
My specific query was regarding shipping of the static library while shipping the dll."

Therefore, I told him that the library file is needed by the linker, but a developer can also use LoadLibrary (as you know, little bit more work is required). Smile | :)

// Afterall, I realized that even my comment lines have bugs

When one cannot invent, one must at least improve (in bed).-My latest fortune cookie

Re: DLL and Static Library Doubt

Ryan Binns23-Jul-03 0:04

Ryan Binns

23-Jul-03 0:04

Aaah yes, but was he shipping the library so that other developers could use it, or was it part of his application that he didn't want other people to use? Wink | ;)

He didn't state this in the question. The most common situation these days is to ship a proprietary DLL as part of an application, so this is what I answered Smile | :)

. Your reply is perfectly valid though Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: DLL and Static Library Doubt

Iain Clarke, Warrior Programmer23-Jul-03 0:00

Iain Clarke, Warrior Programmer

23-Jul-03 0:00

I've posted a reply to Toni78 which you should read[^].

Iain.

Maximum number of Edit boxes in a dialog?

spaced_out22-Jul-03 19:55

spaced_out

22-Jul-03 19:55

I have a dialog that I am going to transfer data from. When I have all of the edit boxes up and I run - no problem.
When I add up to 10 member variables (double and int total equal 10) I have no problem.
When I go past that small number of member variables I get this error?

MYSOURCE caused an invalid page fault in<br />
module KERNEL32.DLL at 0167:bff766bc.<br />
Registers:<br />
EAX=00550028 CS=0167 EIP=bff766bc EFLGS=00210246<br />
EBX=00000001 SS=016f ESP=00550000 EBP=00550010<br />
ECX=00550110 DS=016f ESI=817df560 FS=328f<br />
EDX=0055045c ES=016f EDI=00550028 GS=0000<br />
Bytes at CS:EIP:<br />
e8 13 ad ff ff 8b 55 08 8f 82 b0 00 00 00 8b 4d <br />
Stack dump:<br />
002a0014 00000000 00550028 00000000 005500f8 bff76733 00550028 005500f8 00000004 00550194 ffffffff 00000000 00000000 00000000 00000000 00000000

Right now, when I am setting the member variable and doing nothing else I get this error. Pushing the button the main dialog causes this window in question to popup. Then closing this window makes a list ctrl fill up in the main window. When the error takes place it looks like the list ctrl is trying to load, but it gives me the erroe before any data is on the screen?

Any suggestions are welcome!

I wish I could type better ...

Re: Maximum number of Edit boxes in a dialog?

Toni7822-Jul-03 20:35

Toni78

22-Jul-03 20:35

I am kind of confused, so here are a few questions:
Are you able to pinpoint the exact line in your source code that leads you this error? (that would really help)
When you say that you cannot have more than 10 member variables, do you mean that you can have more than 10 edit controls on your dialog box but you can assign variables to only 10 of them?

To me is sounds more like you are trying to access something that you haven't initialized yet. A common error, is trying to read or send data to a control of a window that hasn't been created yet.
And finally (even though this doesn't seem to be the problem in your case) if you have visual studio 6.0 installed, make sure you have SP5 installed as well.

// Afterall, I realized that even my comment lines have bugs

When one cannot invent, one must at least improve (in bed).-My latest fortune cookie

Re: Maximum number of Edit boxes in a dialog?

spaced_out23-Jul-03 3:35

spaced_out

23-Jul-03 3:35

For some reason the wizard wasn't defining the type of variables? Anyway, I put them in by hand and it works now. Thanks

I wish I could type better ...

Re: Maximum number of Edit boxes in a dialog?

Toni7823-Jul-03 12:38

Toni78

23-Jul-03 12:38

You don't have to thank me. I didn't really get to help you. Smile | :)

// Afterall, I realized that even my comment lines have bugs

When one cannot invent, one must at least improve (in bed).-My latest fortune cookie

Re: Maximum number of Edit boxes in a dialog?

Frank K22-Jul-03 22:12

Frank K

22-Jul-03 22:12

I think like Toni78 (e.g. example of source code, assign variables)

I think the edit boxes aren't the problem, because in the past i have programmed a dialog with more than 100 edit boxes ... and Win95, Win98, WinME can support a maximum of 16.364 window handles. Other operating systems (NT4, 2000, XP) can support more.

Regards Frank

VC++ dialog box

IT_student22-Jul-03 19:38

IT_student

22-Jul-03 19:38

how do i plot the values i accpet in the dialog box on the view.i want to plot a point at the coordinates that i accpet from the dialog box.
i donno VC++ so please help!

Every problem has a solution!

Re: VC++ dialog box

Bob Stanneveld23-Jul-03 2:15

Bob Stanneveld

23-Jul-03 2:15

In your dialog create a Data Map to exchange data from your dialog to your dialog class (if you use the app wizard this is done automatically, otherwize you should implement the DoDataExchange() method).
after doing that, derive your view class from CView and override OnPaint(). In the OnPaint, use pDC->MoveTo() and pDC->LineT0() to move around and draw lines.

good luck!

A student knows little about a lot.
A professor knows a lot about little.
I know everything about nothing.

extracting frames from mpeg1

ram_chus22-Jul-03 19:27

ram_chus

22-Jul-03 19:27

sir,
i m at msc.final sem, an intrested dev & des a mpeg1 player. i made one by using directshow. i need 2 sep A/V & extract indv frames. how can i? plz send me som src code, becaz i m a newbe for directx. i need to subm this at my col as an assi. i m very much Cry | :((

abt that. plz help me.
Ram

Database Creation in Windows2000Prg

ValliS22-Jul-03 18:51

ValliS

22-Jul-03 18:51

Hi All,

I am new to this site. And need help badly.

I want to Create and access Database(MSAccess) from Windows programming. Can someone please direct me . Confused | :confused:

Thanks
Valli

Re: Database Creation in Windows2000Prg

PJ Arends22-Jul-03 19:47

PJ Arends

22-Jul-03 19:47

For Database creation : A set of ADOX Classes[^]

For Database access : A set of ADO Classes - version 2.07[^]

ADO Connection Strings[^]

Three excellent articles by Carlos Antollini.

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: Database Creation in Windows2000Prg

ValliS22-Jul-03 23:18

ValliS

22-Jul-03 23:18

PJ Arends

Thank you soo much for your help.

Regards
Valli

Visual C++ .NET troubles

User 665822-Jul-03 14:12

User 6658

22-Jul-03 14:12

Hi
I just switched from Visual C++ 6 to Visual C++ .NET and converted my old project (.dws) to a solution. Now, when I try to compile my program I get compiler errors I didn't get under VC++6:

CStringArray  status;
status.Add("test");
...
cbei.pszText = status.GetAt(0).GetBuffer(); // <- ERROR

error:

error C2663: 'ATL::CSimpleStringT<BaseType,t_bMFCDLL>::GetBuffer' : 2 overloads have no legal conversion for 'this' pointer
        with
        [
            BaseType=char,
            t_bMFCDLL=true
        ]

what does that mean? WTF | :WTF:

regards

modified 12-Sep-18 21:01pm.

Re: Visual C++ .NET troubles

Anders Molin22-Jul-03 14:51

Anders Molin

22-Jul-03 14:51

What is cbei.pszText?

- Anders

Money talks, but all mine ever says is "Goodbye!"

Re: Visual C++ .NET troubles

User 665823-Jul-03 1:15

User 6658

23-Jul-03 1:15

It's a COMBOBOXEXITEM struct.

modified 12-Sep-18 21:01pm.

Re: Visual C++ .NET troubles

Michael Dunn22-Jul-03 15:19

Michael Dunn

22-Jul-03 15:19

Call GetBuffer(0) which will give you a non-const pointer to whatever the current contents of the string are.

--Mike--
"Big handwavy generalizations made from a position of deep ignorance is one of the biggest wastes of time on the net today.
-- Joel Spolsky
Ericahist | Homepage | RightClick-Encrypt | 1ClickPicGrabber

Re: Visual C++ .NET troubles

User 665823-Jul-03 1:17

User 6658

23-Jul-03 1:17

I still get the same error. I can't understand what an error regarding 'ATL::CSimpleStringT<BaseType,t_bMFCDLL>::GetBuffer' : 2 overloads have no legal conversion for 'this' pointer has to do in context of a simple CStringArray Confused | :confused:

modified 12-Sep-18 21:01pm.

Getting the edit window that currently has focus

Kuniva22-Jul-03 13:47

Kuniva

22-Jul-03 13:47

How do i get a handle to the child edit window that currently has the focus (in another app)?

Kuniva
--------------------------------------------

Re: Getting the edit window that currently has focus

Ryan Binns22-Jul-03 17:32

Ryan Binns

22-Jul-03 17:32

GetForegroundWindow() should work for most controls.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Getting the edit window that currently has focus

Kuniva23-Jul-03 0:53

Kuniva

23-Jul-03 0:53

mm i thought that only got the parent window, but anyways, found a way around it already using keybd_event().

But now i came accross another problem: I'm trying to put text in the edit that has the focus using keybd_event() and sending the keycodes. I'm running XP and i'm doing something like this:

char* message = Hello!";
BYTE scan=0;
DWORD flags=0,info=0;

Sleep(5000); // Sleep for 5 seconds so i can switch windows and set focus to an edit

for(int i=0;i<sizeof(message);i++)
{
    keybd_event((int)message[i],scan,flags,info);
}

Now the problem is that i don't get my message at all. Its like the codes shift and take on another value. So what i tried was changing the value of message[i] with a constant. I then found when i substracted 32 i got the lowercase letters to work right, but now my problem is, everything else still doesnt work! The capitals arent right and neither is anything else.. whats causing this?? I thought if u specify a char like that it gives the value from 0 to 255 and its the right ASCII code?? How do i fix this?

Many thanks

Kuniva
--------------------------------------------

Re: Getting the edit window that currently has focus

Ryan Binns23-Jul-03 4:27

Ryan Binns

23-Jul-03 4:27

Kuniva wrote:
I thought if u specify a char like that it gives the value from 0 to 255 and its the right ASCII code??

No. keybd_event() takes the virtual-key code of the key. On a keyboard, the lower-case and upper-case letters are produced with the same key. To produce an upper-case key, you have to simulate the shift key being pressed as well. Similarly for an exclamation mark (shift-1). Also, you'll need to simulate the keys being released as well as pressed. You'll have to do something like this:

keybd_event(VK_SHIFT, 0, 0);               // Press the shift key
keybd_event('H', 0, 0);                    // Press the 'H' key
keybd_event('H', 0, KEYEVENTF_KEYUP);      // Release the 'H' key
keybd_event(VK_SHIFT, 0, KEYEVENTF_KEYUP); // Release the shift key
keybd_event('E', 0, 0);                    // Press the 'E' key
keybd_event('E', 0, KEYEVENTF_KEYUP);      // Release the 'E' key
keybd_event('L', 0, 0);                    // Press the 'L' key
keybd_event('L', 0, KEYEVENTF_KEYUP);      // Release the 'L' key
keybd_event('L', 0, 0);                    // Press the 'L' key
keybd_event('L', 0, KEYEVENTF_KEYUP);      // Release the 'L' key
keybd_event('O', 0, 0);                    // Press the 'O' key
keybd_event('O', 0, KEYEVENTF_KEYUP);      // Release the 'O' key
keybd_event(VK_SHIFT, 0, 0);               // Press the shift key
keybd_event('1', 0, 0);                    // Press the '1' key
keybd_event('1', 0, KEYEVENTF_KEYUP);      // Release the '1' key
keybd_event(VK_SHIFT, 0, KEYEVENTF_KEYUP); // Release the shift key

Hope this helps,

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

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