C / C++ / MFC Discussion Boards

Re: function transfer

youbo31-Jul-07 19:22

youbo

31-Jul-07 19:22

thank you for your enlisting,although i have figured out it,but i will give more explanation to the problem next time

problem with cout<<endl;

dalmar mahamoud31-Jul-07 14:20

dalmar mahamoud

31-Jul-07 14:20

Hi everyone,

I am beginner and I don't know the difference between
cout<

Re: problem with cout <<endl;

Michael Dunn31-Jul-07 14:28

Michael Dunn

31-Jul-07 14:28

endl means "move the cursor to the next line", no matter where it appears. So your first line of code moves the cursor to the next line. Your second line of code prints "statement" and then moves the cursor to the next line.

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Re: problem with cout <<endl;

Fernando A. Gomez F.31-Jul-07 14:40

Fernando A. Gomez F.

31-Jul-07 14:40

IIRC endl will append a \n caracter to the line and call the flush function. In other words,

cout << "statement" << endl;

is the same as writing:

cout << "statement\n";
cout.flush();

A polar bear is a bear whose coordinates has been changed in terms of sine and cosine.
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Nation States

Re: problem with cout <<endl;

dalmar mahamoud31-Jul-07 14:56

dalmar mahamoud

31-Jul-07 14:56

thanks for your thoughts...

Re: problem with cout<<endl;

ThatsAlok1-Aug-07 20:24

ThatsAlok

1-Aug-07 20:24

dalmar mahamoud wrote:
cout<<endl; and=""
cout="" <<"statement"<<="" endl;.<="" blockquote="">

there is tnohing diffrent except First Line is giving Line Break and Second one is giving line break after writing "statement" on screen!

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What can you do with another window's handle?

deostroll31-Jul-07 13:34

deostroll

31-Jul-07 13:34

Can I find what kind of controls the other window has if I have the value to it's handle?

Re: What can you do with another window's handle?

Naveen31-Jul-07 14:15

Naveen

31-Jul-07 14:15

Use the GetClassName() function to find the class of a control.That is if it is a edit control it returns "Edit"( WC_EDIT ).

nave

[OpenedFileFinder]

Re: What can you do with another window's handle?

bryce31-Jul-07 19:03

bryce

31-Jul-07 19:03

CWnd::FromHandle
static CWnd* PASCAL FromHandle( HWND hWnd );

gives you a Cwnd pointer to the window in question ...from there i;d be looking at the help files for information about how to get pointers to child windows

bryce

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Re: What can you do with another window's handle?

Naveen31-Jul-07 19:28

Naveen

31-Jul-07 19:28

bryce wrote:
how to get pointers to child windows

EnumChildWindow()...?

nave

[OpenedFileFinder]

Re: What can you do with another window's handle?

ThatsAlok31-Jul-07 22:54

ThatsAlok

31-Jul-07 22:54

bryce wrote:
gives you a Cwnd pointer to the window in question ...from there i;d be looking at the help files for information about how to get pointers to child windows

FindWindowEx

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

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Identifying the app that calls a DLL

Fernando A. Gomez F.31-Jul-07 13:15

Fernando A. Gomez F.

31-Jul-07 13:15

Hello all. I have a DLL that is used among two different applications. So far, it was nice. However, they recently decided that the application should use some directory (for reading config files) if it is called from program "x" or other directory if the program is "y".

Now I know that with some registry flag or file (no multithread support is required) this will work. Yet I don't want to create extra files and registry keys and such.

So I was wondering, is there any way I can know which program is calling the DLL's functions? I was thinking something about some of the parameters of DllMain, but since I'm with MFC this time, I don't have DllMain, but CWinApp::InitInstance.

Any suggestion will be really appreciated.

Regards,
FG.

A polar bear is a bear whose coordinates has been changed in terms of sine and cosine.
Quanehsti Pah
Nation States

Re: Identifying the app that calls a DLL

Naveen31-Jul-07 14:21

Naveen

31-Jul-07 14:21

GetModuleFileName() will return the name of the executable( the HMODULE should be passed as NULL ). So I think with this you can distinguish the exe.

nave

[OpenedFileFinder]

Re: Identifying the app that calls a DLL

Fernando A. Gomez F.1-Aug-07 6:56

Fernando A. Gomez F.

1-Aug-07 6:56

Yep, worked perfectly, thank you.

Might add that I thought on that function, but also thought that it would return me the name of the DLL... D'Oh! | :doh:

A polar bear is a bear whose coordinates has been changed in terms of sine and cosine.
Quanehsti Pah
Nation States

"unresolved external symbol"

alberthyc31-Jul-07 11:12

alberthyc

31-Jul-07 11:12

hi, i wrote a multithread MFC dialog,
in my CMYTESTDlg class,i declared a static thread function and several static variable like param1.
the thread funtion uses the static variable, but i got error lke this during linking:unresolved external symbol "public: static long CMyTestDlg::param1"
(if i don't use static variable, the error will be something like illegal refernce)

what's gonig on? and how do i fix the error?

Re: "unresolved external symbol"

Cyrilix31-Jul-07 11:19

Cyrilix

31-Jul-07 11:19

You have to initialize your static variables.

<br />
long CmyTestDlg::param1 = 0;<br />

Re: "unresolved external symbol"

alberthyc31-Jul-07 11:30

alberthyc

31-Jul-07 11:30

i think i did initialized the variables,
here is my thread function

UINT __cdecl ThreadFunc(LPVOID pParam){//AfxBeginThread(ThreadFunc, this);
CMyTestDlg* me=(CMyTestDlg*)pParam;
me->param1 = 0;
....
}

Re: "unresolved external symbol"

Mark Salsbery31-Jul-07 11:43

Mark Salsbery

31-Jul-07 11:43

You need to define the static variable, as Cyrilix showed (outside of the class declaration).

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: "unresolved external symbol"

alberthyc31-Jul-07 12:11

alberthyc

31-Jul-07 12:11

got it, thx a lot

Re: "unresolved external symbol"

ThatsAlok31-Jul-07 22:44

ThatsAlok

31-Jul-07 22:44

alberthyc wrote:
me->param1 = 0;

if param1 is static variable you should call it like this
CMyTestDlg::param1 not me->param1. as static variable not linked with object

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
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VC Forum Q&A :- I/ IV
Support CRY- Child Relief

difference between debug mode and release mode.

emmmatty131-Jul-07 10:18

emmmatty1

31-Jul-07 10:18

Hi,
I got an activex control which works fine in debug build but the same is showing 'memory not enough' problem in release mode.

Please advice.

Thanks in advance.

Regards,
John.

Re: difference between debug mode and release mode.

Mark Salsbery31-Jul-07 10:26

Mark Salsbery

31-Jul-07 10:26

Probably start with all the compiler and linker settings and their differences.

You can also have debug info attached in a release build and run it in the debugger.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: difference between debug mode and release mode.

emmmatty131-Jul-07 10:37

emmmatty1

31-Jul-07 10:37

Probably start with all the compiler and linker settings and their differences.
<<
I gave all the setting of the debug mode to the release mode. Still the bug
persists.
>>
You can also have debug info attached in a release build and run it in the debugger.
<<
If i tick on the 'Generate debug info' in the Project>Settings>Link for the release setting i cant set up a break point. It will get disabled.
>>

Thanks for your attention.

Kind regards,
John.

Re: difference between debug mode and release mode.

Mark Salsbery31-Jul-07 11:45

Mark Salsbery

31-Jul-07 11:45

Do you have debugging info turned on for the compiler as well?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Changing Screen Brightness/Colour/Contrast

mcsherry31-Jul-07 6:51

mcsherry

31-Jul-07 6:51

Please can anyone tell me how to get and change the contrast/colour/brightness of the screen in C++/MFC.

TIA,
Andy

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