C / C++ / MFC

27-Apr-05 7:09

How can I read/write registry entries in an mfc dll?
e.g. can I use the CWinApp interface ?

Thanks.

- KarmaFX

David Crow27-Apr-05 7:16

27-Apr-05 7:16

karmafx wrote:
How can I read/write registry entries in an mfc dll?

The same way you would in an EXE...with the registry API.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

karmafx27-Apr-05 7:34

27-Apr-05 7:34

Thanks..
Okay, so I guess I cannot do it the MFC way ?

i.e.

CWinApp* pApp = AfxGetApp();
CString key = "Preferences";
CString f = pApp->GetProfileString(key,....
int l = pApp->GetProfileInt(key, ....
....

?????

David Crow27-Apr-05 7:41

27-Apr-05 7:41

Sure, you can use the CWinApp() methods, but they are slightly less flexible that the API itself. It really just depends on exactly what you are wanting storing and where.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

karmafx27-Apr-05 7:46

27-Apr-05 7:46

Ok...so now my questions boils down to:

How do I get a CWinApp interface within a dll ?
in my experience AfxGetApp returns null in dll's...

Thanks again.

- KarmaFX

Blake Miller27-Apr-05 8:01

Blake Miller

27-Apr-05 8:01

There are several decent registry classes here on CodeProject.
Why not choose one and use it?
Ignore the CWinApp stuff Dead | X|

David Crow27-Apr-05 8:07

27-Apr-05 8:07

karmafx wrote:
How do I get a CWinApp interface within a dll ?

Unless your DLL already uses MFC, you can't.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Larry J. Siddens27-Apr-05 8:21

Larry J. Siddens

27-Apr-05 8:21

Take a look at the CRegKey class.

Larry J. Siddens

karmafx27-Apr-05 8:28

how i can catch right button click on CButton ? (mfc)

27-Apr-05 8:28

Thanks alot ! Smile | :)

- KarmaFX

icon saving problem

laiju27-Apr-05 7:00

laiju

27-Apr-05 7:00

in the following code iam trying to save an edited icon with its relevant pixel information.
But iam unable to save in Iconformat using the specifier ImageFormatIcon.
But the same can be saved in Bmp format using the specifier ImageFormatBMP
Can anyone let me know the reason.

CImage icon_image;
icon_image.Create(sizex, sizey, 8);
// Fill color table with pre-defined colors
RGBQUAD FAR* pRGB = new RGBQUAD[nColors];
DWORD dwval;
UINT r, g, b;
int j;
for (int i=0; i

Yanshof27-Apr-05 5:54

Yanshof

27-Apr-05 5:54

I try to make some DoModol when user click whith right button of mouse on CButton , but i cant catch click above.

please help me. . . .

Re: how i can catch right button click on CButton ? (mfc)

David Crow27-Apr-05 7:18

Re: how i can catch right button click on CButton ? (mfc)

27-Apr-05 7:18

Right-clicking a button is not very intuitive. What exactly is it that you are trying to do?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Yanshof27-Apr-05 18:14

Yanshof

27-Apr-05 18:14

i need to popup window dialog (something like menu popup),
the dialog/menu will popup on right click button.

Re: how i can catch right button click on CButton ? (mfc)

Larry J. Siddens27-Apr-05 8:32

Larry J. Siddens

27-Apr-05 8:32

Create a new class and inheriate the CButton class...

class CMyButton : public CButton
{
. . .
}

Then capture on the WM_RBUTTONDOWN message. Using the wizard for VC6.0 and the properties for VS2003.

In there do what you need to do.

Hope this helps.

Larry J. Siddens

Re: how i can catch right button click on CButton ? (mfc)

Yanshof27-Apr-05 18:17

Yanshof

27-Apr-05 18:17

ok , this is the "long" way that i thought about ,
but can`t i do it with out creat new class ??
does microsoft didnt make to us "easy" to us easy life ?

Re: how i can catch right button click on CButton ? (mfc)

ThatsAlok27-Apr-05 23:34

ThatsAlok

27-Apr-05 23:34

yanshof wrote:
but can`t i do it with out creat new class ??
No you have to make you own class derived from CButton!

yanshof wrote:
does microsoft didnt make to us "easy" to us easy life ?
D'Oh! | :doh:

Don't you think MS already make you life easy by providing Inheritance to there proprietary classes

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

cheers,
Alok Gupta

VPN Connection

Steve Thresher27-Apr-05 4:21

Steve Thresher

27-Apr-05 4:21

Is it possible to create a VPN connection programmatically?

Systems AXIS Ltd - Software for Business ...

Basic question

Anonymous27-Apr-05 3:26

Anonymous

27-Apr-05 3:26

I need to read a data file using C++, it's a data file that contains a row of column headers before the actual data. I need C++ to remove the header and re-print just the data into a new data file. Any suggestions?

Re: Basic question

David Crow27-Apr-05 4:44

27-Apr-05 4:44

Are you using MFC? If so, then the following snippet should (it's untested) work for you:

CStdioFile in(<code>""</code>, CFile::modeRead), out(<code>""</code>, CFile::modeWrite | CFile::modeCreate);
CString strLine;
in.ReadString(strLine);
while (in.ReadString(strLine))
    out.WriteString(strLine);
in.Close();
out.Close();
CFile::Remove(in.GetFilePath());
CFile::Rename(in.GetFilePath(), out.GetFilePath());

A slightly harder-to-read, but more efficient, approach would look like:

CFile in(<code>""</code>, CFile::modeRead), out(<code>""</code>, CFile::modeWrite | CFile::modeCreate);
char c;
LPSTR pBuffer;
DWORD dwLength = in.GetLength();    
 
do
{
    in.Read(&c, 1);
    dwLength--;
} while (c != 0x0a);
 
pBuffer = new char[dwLength];
in.Read(pBuffer, dwLength);
out.Write(pBuffer, dwLength);
delete [] pBuffer;
 
// close, delete, and rename here

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Basic question

Christian Graus27-Apr-05 4:56

Christian Graus

27-Apr-05 4:56

Use iostreams. MFC file reading is crap.
You just want to read the first line and discard it, then read and keep the rest ? Use getline, an ifstream and an ofstream ( or a stringstream to read the file, then write it to the same file in a seperate operation ). I've written articles on this here on CP, you should have no trouble finding them.

Christian Graus - Microsoft MVP - C++

Re: Basic question

namaskaaram28-Apr-05 0:42

namaskaaram

28-Apr-05 0:42

if u want to do it using the basicz...then i would suggest the fopen,fgetc,fputc.....it can get complicated though!!!!!

cheerz..... Big Grin | :-D

"faith, hope, love remain, these three.....; but the greatest of these is love" -1 Corinthians 13:13

create C++ construct

Anonymous27-Apr-05 2:50

Anonymous

27-Apr-05 2:50

Im confused about how to create a C++ constructor that uses the current time from the time() function that will declare in the C++ standard library header to initialize the object of the Time class. Im a newbie at this can you guys give me a few pointers

Re: create C++ construct

David Crow27-Apr-05 4:29