C / C++ / MFC

Re: fatal error C1189: #error : WINDOWS.H already included. MFC apps must not #include

3-Feb-09 21:44

add stdafx.h on top of everything in the source file where it points the error.

Kiran Pinjala3-Feb-09 22:24

Kiran Pinjala

3-Feb-09 22:24

Hi Smith,
I dont have a stdafx.h file in my project.
I have created an empty console application and created my .h and .cpp files later.

Saadhinchaali

Re: fatal error C1189: #error : WINDOWS.H already included. MFC apps must not #include

David Crow4-Feb-09 3:32

David Crow

4-Feb-09 3:32

Where are you including afxwin.h at?

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

timeSetEvent only in Windows XP?

nm_1143-Feb-09 19:25

nm_114

3-Feb-09 19:25

MSDN says the requirements for timeKillEvent are

Windows NT/2000/XP: Included in Windows NT 3.1 and later.
Windows 95/98/Me: Included in Windows 95 and later.

but the requirements for timeSetEvent are

Windows XP: Included in Windows XP only.

Really? Since timeKillEvent uses the return value of timeSetEvent, this doesn't seem to make sense.

Re: timeSetEvent only in Windows XP?

Stuart Dootson3-Feb-09 21:14

Stuart Dootson

3-Feb-09 21:14

I think that's incorrect - I have a very old copy of the MSDN library (October 2001) that documents timeSetEvent with:

Windows NT/2000/XP: Included in Windows NT 3.1 and later.
Windows 95/98/Me: Included in Windows 95 and later.
Header: Declared in Mmsystem.h; include Windows.h.
Library: Use Winmm.lib.

HTH!

Ensuring DialogBox is fully initialized

prashantbhatia0073-Feb-09 19:03

prashantbhatia007

3-Feb-09 19:03

Hi,
I want to know is there a event/notification/method to know that dialog box is initialized. i.e. OnInitDialog() call is finished, dialog box is visible and all controls on it are visible.

Based on this, I need to show a message box depending upon some condition after dialog box is fully intialized. Right now i am able to do it by Setting a timer in OnInitDialog() function with delay of 400 ms. And then in OnTimer, i am able to show the message box depending upont the condition.

Other methods suggested to me are Use PostMessage() inside the OnInitdialog() with some user defined message and in handler i can show message box. But This does not work as it comes in the handler of User defined message before my dialog box is shown.

Please provide your views on this.

Thanks
Prashant

Re: Ensuring DialogBox is fully initialized

SandipG 3-Feb-09 20:51

SandipG

3-Feb-09 20:51

May be you can try handling CWnd::OnActivateApp..

Regards,
Sandip.

Re: Ensuring DialogBox is fully initialized

prasad_som4-Feb-09 0:48

prasad_som

4-Feb-09 0:48

Have you tried handling WM_SHOWWINDOW message(OnShowWindow) ?

You just need to keep track of when you want to use it.

Re: Ensuring DialogBox is fully initialized

Iain Clarke, Warrior Programmer4-Feb-09 1:28

Iain Clarke, Warrior Programmer

4-Feb-09 1:28

It's very dull, but what I've done in a similar situation is to have a member variable: m_bInitialised.

CMyDialog () : CDialog (blah)
{
   ...
   m_bInitialised = FALSE;
}

BOOL CMyDialog::OnInitDialog ()
{
   ...

   BOOL bReturn = CDialog::OnInitDialog ();
   m_bInitialised = TRUE;
   return bReturn;
}

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

drives list

K. Sushilkumar3-Feb-09 18:44

K. Sushilkumar

3-Feb-09 18:44

I have three users viz.
User1
User2
User3

User2 has mapped network drive.

Now when i enumerate drives using GetLogicalDrieStrings in User1, i only get drives of User1.

What i want is to enumerate all the drives including mapped drive in User2 in any user context.

How can i acheive this???

Thanks in advance.

Regards,
K. Sushilkumar.

Re: drives list

«_Superman_»3-Feb-09 20:56

3-Feb-09 20:56

Mapped drives are maintained per context.
So a mapped network drive of one user may not be valid for another user.
It is also dependent on the user privileges.

So Z: may be mapped by 2 different users on 2 different locations.

«_Superman_»

Socket programming

Member 46946273-Feb-09 18:25

3-Feb-09 18:25

Hi,
I have created client and server application that uses
sockets for communication. But only single client can connect to server.
I have to connect multiple clients to same server.
Can anybody help me?
Thanks in Advance

«_Superman_»3-Feb-09 18:31

3-Feb-09 18:31

You will need a multi-threaded program to handle multiple clients.

One dedicated thread will only wait for new client connections and will not do any other processing.
As soon as a client connects, a new thread is created to handle that particular client.

Either this or you can create the server using IO completion ports.

«_Superman_»

Member 46946273-Feb-09 18:41

3-Feb-09 18:41

"you can create the server using IO completion ports".
Can you please explain?

«_Superman_»3-Feb-09 18:47

3-Feb-09 18:47

I/O completion port is a mechanism to create high performance server applications.

Look at these links.
http://msdn.microsoft.com/en-us/library/aa365198(VS.85).aspx[^]
http://technet.microsoft.com/en-us/sysinternals/bb963891.aspx[^]

There are many articles on Code Project too.
http://www.codeproject.com/info/search.aspx?artkw=completion+port&sbo=kw[^]

«_Superman_»

Member 46946273-Feb-09 20:46

3-Feb-09 20:46

I have created separate thread for multiple clients.
In that case also connection failed from more than one client

Smith#3-Feb-09 20:49

3-Feb-09 20:49

It looks like your server is not keeping the wait for the next client. Can you show your server code ? that waits for the next client?

Member 46946273-Feb-09 21:16

3-Feb-09 21:16

In server I have derived class from CAsyncSocket and had overrided OnAccept function
I am creating new thread from OnAccept function and wrote send,recieve functionalities inside the thread procedure.I have not added wait in server because OnAccept will be invoked when client tries to connect.
Can u please mention what is the problem??

Smith#3-Feb-09 21:59

3-Feb-09 21:59

Haven't used MFC for sockets sorry.

Member 46946273-Feb-09 22:42

Problem accessing C# dll in VC 6.0

3-Feb-09 22:42

Is it possible with winsockets?

raesa3-Feb-09 18:13

raesa

3-Feb-09 18:13

Hi, i have a small problem i have a csharp dll built in VS2005.I have to access the functions from this dll in my VC++ project done in VC 6.0.My VC project is not able to identify my C# namespace and class.I dont get what the problem is. Please do have a look at my c# code and VC Project code and do let me know if im making some mistake.I have also pasted the errors that i am getting. please do help me...i'm not able to understand the problem. Frown | :(

C# code:

using System;
using System.Collections.Generic;
using System.Text;
namespace TestDllCsharp
{
public class Class1
{
public void PrintMessage ()
{
System.Windows.Forms.MessageBox.Show("Test");
}
}
}

VC Project :
#import "TestDllCsharp.tlb"
using namespace TestDllCsharp;
#include <stdio.h>
void main()
{
HRESULT hresult;
CLSID clsid;
CoInitialize(NULL);
hresult=CLSIDFromProgID(OLESTR("TestDllCsharp.Class1"),&clsid);
if (hresult == 0)
{
_Class1 *t;
hresult=CoCreateInstance(clsid,NULL,CLSCTX_INPROC_SERVER,__uuidof(_Class1),(LPVOID *) &t);
t->PrintMessage ();
CoUninitialize();
}
}

I get errors like :
error C2065: '_Class1' : undeclared identifier
error C2065: 't' : undeclared identifier

Thnx in advance.

Re: Problem accessing C# dll in VC 6.0

«_Superman_»3-Feb-09 18:33

Re: Problem accessing C# dll in VC 6.0

3-Feb-09 18:33

You cannot directly access a C# class in VC.
You will need to create a COM Callable Wrapper (CCW) from the C# class.
Look at the documentation on how to create CCWs.

Then you can access it from VC like you access a COM component.

«_Superman_»

Smith#3-Feb-09 20:47