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I have a class called CFileObject derived from CObject and a class called CFileTree derived from CObList. At a particular point in my program, I have an if statement that tests if an object (could be a CFileObject or CFileTree) is a CFileObject. At a point in the execution, the object is a CFileTree but when it runs the test, it returns true, saying it's a CFileObject which is incorrect. Do I need to declare my two types as being the types that they are so IsKindOf() can resolve properly?
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From the MSDN documentation[^]:
"This function works only for classes declared with the DECLARE_DYNAMIC, DECLARE_DYNCREATE, or DECLARE_SERIAL macro. Do not use this function extensively because it defeats the C++ polymorphism feature. Use virtual functions instead."
/ravi
My new year's resolution: 2048 x 1536
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You could try using dynamic_cast instead. But as Ravi said, it's not good OO practice.
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
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hi
you can use the CString constructor to do this
CString strInfo(IDS_INFO);
or the Format method of CString if the reseource string needs additional paramaters
like this:
CString strHelloWorld;<br />
strHelloWorld.Format(IDS_HELLO, "world");
Regards
codito ergo sum
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You can also use AfxFormatString1 & AfxFormatString2
if your resource HELLO_ID is: "Hello %1"
you can do:
CString result;
AfxFormatString1(result HELLO_ID, "World");
it gives u Hello World
Eric
Premature optimization is the root of all evil
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CString strFoo;
VERIFY (strFoo.LoadString (IDS_Foo)); /ravi
My new year's resolution: 2048 x 1536
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ravib(at)ravib(dot)com
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Hmm... seems like it won't work:
---------------------------
#include <afx.h>
#include "stdafx.h"
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
CString errors;
errors.LoadString(IDS_ERROR1);
MessageBox(NULL, errors, "Hello", MB_OK);
return 0;
}
---------------------------
Errors:
---------------------------
C:\VCProjs\KixWTF\KixWTF.cpp(14) : error C2065: 'CString' : undeclared identifier
C:\VCProjs\KixWTF\KixWTF.cpp(14) : error C2146: syntax error : missing ';' before identifier 'errors'
C:\VCProjs\KixWTF\KixWTF.cpp(14) : error C2065: 'errors' : undeclared identifier
C:\VCProjs\KixWTF\KixWTF.cpp(16) : error C2228: left of '.LoadStringA' must have class/struct/union type
C:\VCProjs\KixWTF\KixWTF.cpp(16) : error C2065: 'IDS_ERROR1' : undeclared identifier
---------------------------
Anyone know? 
Thanks! 
PS: <code> tag didn't work.
Sulfurik K. Nosferathus (Darth_Sulfur)
www.SulfurMidis.com
www.SulfurSoft.tk
http://www.BeepXtreme.tk
[ftp://][http://][hotline://]tsfc.ath.cx
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I assumed you were building an MFC app. Here's[^] a link to the Win32 version of the API.
/ravi
My new year's resolution: 2048 x 1536
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Darth_Sulfur wrote: Do you know how to make a MFC app, but without a main window?
Create a console application and select MFC support.
/ravi
My new year's resolution: 2048 x 1536
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ravib(at)ravib(dot)com
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Darth_Sulfur wrote: but I have a DOS box in the background... How do I take that out?
Create an MFC dialog based application and don't create the dialog in your app's InitInstance() method. Instead, just execute whatever (non-GUI) code you wish to call. Note, your app will exit when it returns from InitInstance().
Hope this helps!
/ravi
My new year's resolution: 2048 x 1536
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ravib(at)ravib(dot)com
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[edit]
Fixed!
MessageBox(NULL, "Hellawz!!1!11", "Hello", MB_OK);
[/edit]
Hello everyone! 
OK, I want to make a program that just displays a message box and exits. How do I do that? When I make a MFC AppWizard (exe), I get a dialog, which I don't want. When I try Win32 Application, I get a C2550 error:
'MessageBoxA' : function does not take 3 parameters
no matter if I select empty, simple, or hello world.
How can I reach what I listed? Thanks!
Sulfurik K. Nosferathus (Darth_Sulfur)
www.SulfurMidis.com
www.SulfurSoft.tk
http://www.BeepXtreme.tk
[ftp://][http://][hotline://]tsfc.ath.cx
-- modified at 4:40 Sunday 6th November, 2005
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Hi
I used a Win32 Console application and didn't have any problems:
#include "stdafx.h"
#include <windows.h>
int _tmain(int argc, _TCHAR* argv[])
{
MessageBox(NULL, "Hello", "Hello", MB_OK);
return 0;
}
codito ergo sum
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In MFC, the MessageBox function works within a dialog and takes 3 paramaters, but the non MFC version takes 4, the one that is omitted is the first one, the handle to the parent window.
Christian Graus - Microsoft MVP - C++
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Try out the AfxMessageBox function ....
Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com
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Hi,
I am creating a shell namespace extension by implementing IShellView and IShellFolder interfaces. The extension will show all the files inside a zip archive. Since the files doesn't physically exist on the disk, I am creating a shell extension which will show the files in the archive just like how XP shows zip files.
But I am having a problem in retrieving the context menu for the file types. If the user right-clicks on a txt file, I would like to show exactly the same context menu, which is shown by right-click on a txt file in explorer.
Could anyone please tell me how this can be done.
Any pointers to sample code / article would be really helpful.
Thanks and Regards
Jugs
"A robust program is resistant to errors -- it either works correctly, or it does not work at all; whereas a fault tolerant program must actually recover from errors."
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This might be a very trivial question for most of you. I want to know how to write a program in vc++ for scanning a particular port on the lan. I have written a chat program, I want that whenever a user starts the client, it scans the network and finds the ip for connecting, if no server is found it will become a server. Most messengers do the same thing I suppose. Thanks in advance.
I dream so I do.
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Hi
I have a suggest,I think it is better to use othere way to find server.
If you wana to use your messanger on a LAN you can use broadcast messages.
when a client want to find server Send a BC message on the network if server peresent answer it by sending message contain its IP & other information and if isn't present the client can work as a server after some try and listen for clients BC message.
Iman Ghasrfakhri
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Yes, that's exactly what I want to do, but I donot know how to implement. Could you please help me with code. Thanks.
I dream so I do.
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Hi
in this code I listen a socket to receive server's response and then Send BC message to the network (this is a client action)
m_LSocket->Create(1000);<br />
m_LSocket->Listen();<br />
CAsyncSocket s;<br />
s.Create(334400,SOCK_DGRAM);<br />
BOOL bOptVal = TRUE;<br />
s.SetSockOpt(SO_BROADCAST,(char*)&bOptVal,sizeof(BOOL));<br />
char buf[256];<br />
<br />
CString Address("255.255.255.255");
unsigned int port = 1000;
strcpy(buf,"Requesting Connection");
s.SendTo(buf,256,port);
On the server side you most listen a Datagram socke (SOCK_DGRAM), and wait to receive a connection request.
Is it enough.;)
Iman Ghasrfakhri
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Thank you very much for the help. May I ask you one more favour, could you please give me the server code aswell. Thanks again.
I dream so I do.
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