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Thanks that worked. So now I can access child functions from the parent?
How about vice versa? How can I access parent functions from the child?
Same for variables. For example, if I press a button in the child (ie CChildDlg::OnButtonPress() ), I want the parent to react to it.
Also, after having dynamically generated the buttons and edit boxes along wiht the ID, how do I now assign a member variable to it? Do I need some sort of dynamic code in the DoDataExchange function?
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acerunner316 wrote: So now I can access child functions from the parent?
Yes, as long as you have a child object to use (pointer allocated with new in the example code).
As long as you keep that around as a member variable in the parent you can call any methods or use
any public variables in the child class.
acerunner316 wrote: How about vice versa? How can I access parent functions from the child?
Sure. You need to get a parent window pointer in the child somehow. You could use GetParent()
in the child class and cast the returned pointer to your parent class. You could also provide
a method in the child class that accepts a pointer to the parent window. Your CDialog and CWnd
derived classes are just classes. CDialog/CWnd wrap the windows API but beyond that you can
extend derived classes any way that suits your needs.
acerunner316 wrote: Same for variables. For example, if I press a button in the child (ie CChildDlg::OnButtonPress() ), I want the parent to react to it.
You could use the ON_COMMAND_RANGE macro in your message map for the range of possible button IDs.
Then in the command (range) message handler use the parent window (obtained like above) to
call a method on the parent to do something. Another way is to post a user msg (using
PostMessage() or SendMessage()) to the parent. If your dialog class always knows its parent
window class (in other words, it won't be used as a child of another class) then using a pointer
to that class type is easiest.
acerunner316 wrote: Also, after having dynamically generated the buttons and edit boxes along wiht the ID, how do I now assign a member variable to it? Do I need some sort of dynamic code in the DoDataExchange function?
If you want to use DDE then yes you'll need to loop through your controls and call DDX_Control()
on each of them. You can always manipulate the controls directly as well. See the CButton and
CEdit class docs for all the member functions you can use.
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This is getting a lot more complicated than I thought. 
In case you haven't noticed, I'm pretty new to Windows programming. heh.
My next question, how can I change the size of the child window after dynamically adding more controls? The scrolling size will have to change as I add more. If you see the code from the original scrolling child windows example, the scrolling ratio is fixed to the size of the child window as it appears in the resource editor.
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I am having trouble using GetParent().
Here is my code that I put in the child dialog. I am trying to access functions and variables of the parent class.
CWnd* pParentWindow;
pParentWindow = GetParent();
pParentWindow->SomeFunction();
x = pParentWindow->TempInt;
The error is "SomeFunction() is not a member of CWnd" and "TempInt is not a member of CWnd".
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You need to cast the CWnd pointer down to the parent window class.
The safest is using dynamic_cast. Enable RTTI (run time type info) in your project and do
something like this...
CMyParentWndClass* pParentWindow = dynamic_cast<CMyParentWndClass*>(GetParent());
if (pParentWindow)
{
pParentWindow->SomeFunction();
x = pParentWindow->TempInt;
}
If you're absolutely positive of the parent window's class type you can use static_cast:
CMyParentWndClass* pParentWindow = static_cast<CMyParentWndClass*>(GetParent());
if (pParentWindow)
{
pParentWindow->SomeFunction();
x = pParentWindow->TempInt;
}
or a regular C++ cast
CMyParentWndClass* pParentWindow = (CMyParentWndClass*)GetParent();
if (pParentWindow)
{
pParentWindow->SomeFunction();
x = pParentWindow->TempInt;
}
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I get the error that CMyParentWndClass (well for me it's CMainDlg) is an undeclared identifier. Is there any other method?
Thanks
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Add a #include directive to include the header file containg your CMainDlg class declaration:
#include "MainDlg.h"
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Oh, I'm an idiot, I didn't think you have to include that if it's a child window.
So how about changing the size and the scrolling ratio when I have dynamically generated controls? How is that done?
Thanks.
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acerunner316 wrote: Can you also elaborate on passing pointers from parent window to child window?
Forgot that one  That was just one way to do it - by having the child dialog "pull" the info
from the parent. The way you are doing it ("pushing" the data to the child from the parent) is
just fine too. See my other reply for why you're getting the error.
Mark
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how would one place a staus bar docked to the bottom of a dialog window, under a horozontal scrollbar? Internet Explorer uses this type of Status Bar setup. Looks really nice.
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Care to be more specific? I'm not sure what part of IE you're talking about. 
--
For proper viewing, take red pill now
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Well,, it's the status bar at the bottom of IE. If you place you mouse over a link, it shows the html address in it.. etc.
And if you shink internet explorer (so that you have to scroll sideways to see the whole page) the status bar is placed under the horizontal scroll bar.
How would one put a status bar like this on a dialog window. I've had sucess with puttin status bars on my dialog, but they alwayse pop up above the horozontal scroll bar. I think the way IE does it looks much better.
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I am using the MFC dialog application.
There are 3 edit box, add1, add2 and sum
and a button "add",
when exectuing, I input add1, add2, and use the "add" function dlg.m_sum=dlg.m_add1+dlg.m_add2
how to make the sum appears in the "sum" edit box? Do I have to add a view class or how to modify the OnPaint?
I now only have add.cpp and addDlg.cpp
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Call UpdateData(FALSE) or SetDlgItemText
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. -Brian Kernighan
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bloodwinner wrote: how to make the sum appears in the "sum" edit box?
By using CWnd::SetWindowText().
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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Hi,
To put result in editbox you can simply use SetWindowText( LPCTSTR lpszString ) method
-----------
Mila
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And if they are int you can use of SetDlgItemInt
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I have created an application(run on win2k) where i communicate with a pci device. Within this application i establish communication by creating a handle to the device. After I've completed the tasks i've set out to do in the application i do:
CloseHandle(hdevice);
i know that: "CloseHandle invalidates the specified object handle,..."
to debug i do:
if(!CloseHandle(hdevice))<br />
AfxMessageBox(_T("DEBUG: Handle ::hndlPciAlt:: not closed!"));
but i never see this message.....
however, from debugging it seems as thought the application was not successful at closing the handle to the device(even when i exit my application). (unless something else is happening...)
the reason i say this is when i use a separate test application provided by the manufacturer to reload and reset the FPGA on the device the registers are not being reset.
if anyone has any insight on this issue, please advice...
thanks in advance,
-- modified at 8:58 Friday 3rd November, 2006
Kitty5
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Hi,
I have been asked to write an application to compare about 5,000,000,000 or more records each of which containing at least 2 groups of 14 digit data, and removes records with repetitive numbers.
All the data are stored in plain text files. I have also told that I have permission to use an IBM Mainframe computer. I don't know the specifications yet, I just know it has a hard disk with around 7 terabytes of capacity(I have never seen such a thing before ).
What I was wondering, was that:
- Is there any one who has any experience using these machines? Do I write my application in Win32? or mainframes have different architecture?
- How to tune up processing time? Which algorithm do you prefer? (I wish data was stored on a SQL Server and I was going to write just a 'group by')
- If I needed to store data, then I prefer using MS. SQL Server. In this case should I buy a special version for the mainframe, or usual (IA32 ) versions will work fine?
Thank you very much in advanced.
//This is not a signature
while (I'm_alive) {
printf("I Love Programming");
}
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Hamed Mosavi wrote: Do I write my application in Win32?
Not unless the mainframe is running Windows!
Hamed Mosavi wrote: or mainframes have different architecture?
If it's an IBM, it could be an AS/400 running OS/400.
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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There are also many mainframes running different types of unix. depends on the manufacturer and on the administrator.
Don't try it, just do it! 
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OS/400
So what compiler can I find there? Is there a C++ compiler available??
I'm a bit afraid. I have never seen AS/400.
Does it have a 'sql dbms' equivalent?
Do I have to use a version of Oracle? Oh, no. I have not been working with any of these.
-- modified at 2:01 Friday 3rd November, 2006
//This is not a signature
while (I'm_alive) {
printf("I Love Programming");
}
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Hamed Mosavi wrote: OS/400
So what compiler can I find there?
My co-worker uses RPG (mostly), Cobol, and C.
Hamed Mosavi wrote: Is there a C++ compiler available??
Does it have a 'sql dbms' equivalent?
Do I have to use a version of Oracle?
I have no idea.
All that aside, if you have a good algorithm, what you want can be accomplished on a decent-speed PC.
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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DavidCrow wrote: All that aside, if you have a good algorithm, what you want can be accomplished on a decent-speed PC.
You might be right, but this is the job that they might do frequently, perhaps once a week. They want to make sure it will not take a long time (More than 1 hour or 2, perhaps).
I didn't calculate yet, but I'm sure it's a lot of processes. However I do agree that a good algorithm can convert hours of process to minutes or seconds. I experienced that already! But best algorithms should think a bit when it comes to 5,000,000,000 and more records of data.
//This is not a signature
while (I'm_alive) {
printf("I Love Programming");
}
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Hi.
Find out what IBM system that you have access to. If it is an S390/ZOS or S390/Z-VM system, then you can easily write an EXEC employing PIPELINES to remove records that contain duplicate data. PIPELINES was specifically designed to handle this kind of situation; processing huge amounts of data easily and efficiently.
For more information, check the IBM website for 'CMS PIPELINES', this will tell you everything that you need to know. If you do not have any joy or need further help, let me know.
Regards.
James.
-- modified at 15:19 Friday 3rd November, 2006
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