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My analysis would eventually lead to what PJ Arends is already telling you (in other messages). I think there is something not quite right in your system.
Anyway, the 'this' of a CPropertyShett will be cast to a CWnd, since the CPropertySheet is derived from a CWnd. That is why I asked if your code was part of a CPropertySheet member function.
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The parent window of the button should be the property sheet. It looks like you are making the button a sibling of the sheet, not a child of the sheet. Also, and I do not know if this is affecting your button creation, but you are using the ID of 1, which is the same as the ID of the OK button which already exists on the sheet.
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
Honoured as one of The Most Helpful Members of 2004
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Thank you for responding.
PJ Arends wrote:
The parent window of the button should be the property sheet. It looks like you are making the button a sibling of the sheet, not a child of the sheet.
Okay, this may be a stupid question, but am I not declaring the parent window as the property sheet? Where am I making it a sibling instead of a child?
I changed the ID, but still nothing.
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Ok, just for the heck of it do this
int CMyPropertySheet::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CPropertySheet::OnCreate(lpCreateStruct) == -1)
return -1;
if (!m_MyButton.Create(_T("The Button"),
WS_CHILD | WS_VISIBLE | WS_TABSTOP | BS_PUSHBUTTON,
CRect(30, 30, 1024, 768),
this,
ID_MY_BUTTON))
{
ASSERT (FALSE);
return -1;
}
return 0;
}You should now have one huge button that takes up your entire sheet and then some. Now play with the size and position until you get the button where you want it.
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
Honoured as one of The Most Helpful Members of 2004
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Nope; no button.
Could it just be that new buttons can't be created directly onto a property sheet? I would think that they could because you can remove buttons or move them around (which I've done).
What am I missing here?
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Unless the create function failed the button has got to be there. Grab Spy++ and look up your sheet, check out what it's child windows are. Your button has to be there. I tried the code I posted before I submitted it and it worked just fine here.
I am at a loss as to what you are doing wrong, because I use this method to add several buttons and a bitmap to my property sheet.
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
Honoured as one of The Most Helpful Members of 2004
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According to Spy++, none of the buttons (yours or mine) are there. It lists the other things associated with the property sheet, including the OK and Cancel buttons, but the buttons that I'm trying to create (which includes the code you supplied as a test) aren't there.
 This is driving me crazy.
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Place a breakpoint in the OnCreate function just to make sure the code is actually being run. Did you remember to add the ON_WM_CREATE() macro to your message map?
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
Honoured as one of The Most Helpful Members of 2004
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PJ Arends wrote:
Did you remember to add the ON_WM_CREATE() macro to your message map?
Yes, I did.
According to the step-through, it is entering OnCreate and moving to the Create line for the button. It is returning 1, but that, according to the message, is success. So, it's saying that it is creating it. I just don't know where it's creating it at since it's not showing up anywhere on the property sheet.
Everything else that I'm doing in OnCreate and OnInit work. Buttons are removed or moved, the menu is added, all of it; everything except creating the buttons.
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Ok, in the debugger check what the value of the button's m_hWnd variable is. Then in Spy++ bring up the window finder dialog (Ctrl + F) and enter that value in the handle edit box. Click Enter. You should now be able to tell which window is the parent of your button, it should be the property sheet, if not what is it?
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
Honoured as one of The Most Helpful Members of 2004
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According to the debugger, the hWnd of the button is 0x00000000. Spy++ says "specified handle is not vallid". I knew that as soon as I saw it, but I tried it anyway.
So, what's happening here? It's being created (it's returning a non-zero value indicating success), but it doesn't have a valid handle. Is it just being created and then destroyed before getting added to the property sheet?
Any ideas?
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bcemick wrote:
Any ideas?
No, that does not make any sense to me. Create() is returning 1 (success) but the buttons HWND is zero (not a window). I am at a loss.
Just for the heck of it maybe you can try doing a rebuild all, that will sometimes fix weird errors.
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
Honoured as one of The Most Helpful Members of 2004
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Tracing into the MFC source for CButton::Create() we get to this code in CWnd::CreateEx (in Wincore.cpp)
#ifdef _DEBUG
if (hWnd == NULL)
{
TRACE1("Warning: Window creation failed: GetLastError returns 0x%8.8X\n",
GetLastError());
}
#endif
if (!AfxUnhookWindowCreate())
PostNcDestroy();
if (hWnd == NULL)
return FALSE;
ASSERT(hWnd == m_hWnd);
return TRUE;So there is no way that Create will return TRUE (1) if the HWND is NULL (0).
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
Honoured as one of The Most Helpful Members of 2004
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PJ Arends wrote:
So there is no way that Create will return TRUE (1) if the HWND is NULL (0).
I know. That's what was so weird about all of this. I swear that's what was happening. I tried rebuild all and now it's returning a non-NULL handle; the handle is still invalid though.
I tried moving it into another function to see what would happen. I got hWnd handles, but none of them are valid handles according to Spy++. It is still returning 1 (success).
The only thing I can think of is that the button is being created, but it's being destroyed before it can be added to the property sheet (if that makes sense - it sounds better in my head). It's either that or I am missing something so obvious that it would've killed me if it was a snake.
One way or another, I'm going to make this work.
Any help is greatly appreciated (and you've been great so far). If nothing else, it eliminates a possibility.
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One last guess, I am sure you did but I have to ask anyway because I am running out of ideas, did you make your CButton variable a member of your CPropertySheet derived class? I ask this because the only way the button would be destroyed before it is added to the sheet is if your CButton variable is going out of scope and being destroyed that way.
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
Honoured as one of The Most Helpful Members of 2004
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PJ Arends wrote:
did you make your CButton variable a member of your CPropertySheet derived class?
ummm....of course I...ummm...you know...umm...
Thank you. I'll go slam my head into a wall repeatedly.
Now I just have to figure out how to get into the right place and then line up those other buttons beside it. Which I will. On my own. So I don't look so incredibly dense.
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(Kid?)
I listened; I really did. I was so sure that I had done it that I almost didn't go check to make sure I had. But, to be on the safe side, I checked. Lo and behold, I had either been attacked by a case of The Stupids and forgotten to do it or deleted it while messing around with it.
Either way, thank you for the help.
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"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
Honoured as one of The Most Helpful Members of 2004
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Well I never thought it possible but I have a strange problem it appears to be a release problem as I have not seen it in debug. For some reason while using the application I get the following runtime error:
Runtime Error!
Program: <program name="">
R6025
- pure virtual function call
I do not believe that I am calling the pure virtual function from the derived class as I do not get the problem all the time.
Does anyone have any suggestions in tracking this down?
Ant.
I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)
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Do you have any pure virtual function definitions?
The most likely cause is a runtime memory scribble. Something is causing the vtable to be overwritten with rubbish.
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Jay Carter wrote:
Do you have any pure virtual function definitions?
Yes, quite a few in various classes.
Jay Carter wrote:
The most likely cause is a runtime memory scribble.
Um, I hope this is not the case. Though I do agree with you, it is the most likely cause.
Ant.
I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)
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I have a toolbar with a drop down menu. The problem is when it is docked left or right you see the toolbar is wider then those without dropdown, as expected. But my separators paint correctly where expected vertically but it is also painted on the right, you see the separator more then once like 2 and 4 below.
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How do I hide the selection of an item. I have developed an own multiselect function and would to hide the original selection (the blue color in CTreeCtrl).
Any tip?
_____________________________
...and justice for all
APe
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Hi all,
I am in process of developing a Server in C++ supporting multiple protocols. The server will be exposing various functionalities, and the clients can communicate over any of the protocols may be TCP, IPX, SAP, NETBEUI to access the server to access the functionalities exposed. The server doesnot know in advance which client is using what protocol.
example my server has functionality X()
and i have n number of client.
client1 is communicating over protocol TCP to access X()
client2 is communicating over protocol IPX to access X()
..
and so on.
We had already developed ( prepared a rough code sketch), a server that is able to handle multiple clients at the same time over TCP /IP. But now, we need to enhance the same so that it can intearct with clients irrespective of the protocol being used.
I am struck with following issue:
1) How to make the client-server flow so that the server knows from which protocol the client has communicated so that the server can send the reply over the same protocol and this whole process is multithreaded.
What all steps are needed to take care of while building the system most efficient.
In summary
need to make server in such a way that it may accept a request from connection oriented protocol as well as connection-less protocol at the same time. so need to develop a mechanism for the same the work for all conditions.
Please suggest. Also please feel free to send your comments/suggestions to make this system more efficient.
All suggestions are welcome.
Thanks,
rdh
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