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As I said before, you need to be sure that your data fields are pointing at static memory blocks. You have the following line(s) in your code:
TCHAR File_name[MAX_PATH];
int index = SendDlgItemMessage(hwnd, IDC_LIST_COMPARE, LB_ADDSTRING, 0, (LPARAM)str);
sprintf(File_name, "1");
SendDlgItemMessage(hwnd, IDC_LIST_COMPARE, LB_SETITEMDATA, (WPARAM)index, (LPARAM)File_name);
However, as soon as you leave this function the variable File_name will be destroyed (because it is on the stack) and your pointer is no longer valid.
You need to do something like:
PTSTR pFile_name;
int index = SendDlgItemMessage(hwnd, IDC_LIST_COMPARE, LB_ADDSTRING, 0, (LPARAM)str);
pFile_name = new TCHAR[the length of the filename + 1];
SendDlgItemMessage(hwnd, IDC_LIST_COMPARE, LB_SETITEMDATA, (WPARAM)index, (LPARAM)pFile_name);
now when you leave this function your filename memory buffer will not be destroyed. You should also remember to delete[] all these memory blocks when you destroy your listbox.
I must get a clever new signature for 2011.
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thank you soo much! I actually got it working with a different slightway, because this way everytime I load the filename it gets re-written, so I have to point the pFile_name to a 2D array. And I dnt know whats new, I just used malloc(), but i think it should be the same.
But yeah thank you soo much!
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Had a try, no effect.
I am very sure there are strings associated with it though, because I add a messagebox check when i add the string in
int index = SendDlgItemMessage(hwnd, IDC_LIST_COMPARE, LB_ADDSTRING, 0, (LPARAM)str);
SendDlgItemMessage(hwnd, IDC_LIST_COMPARE, LB_SETITEMDATA, (WPARAM)index, (LPARAM)File_name);
HWND hList = GetDlgItem(hwnd, IDC_LIST_COMPARE);
int data = SendMessage(hList, LB_GETITEMDATA, (WPARAM)index, 0);
MessageBox (hwnd, (char *)data, "The stored data for the newly selected item is...", MB_OK);
here the string associated displayed fine. Since the dialogue box is zero-based index your code should work fine, but i have no idea why it is now working....
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Hi all,
I have a problem with my app that I am writing (VC6), where when I add a dialog control and then double click to add a member function, VC does not add the function, and I end up with every Generated message map functions doubled up, which of course gives the "member function already defined or declared" compile error.
Every time I repeat this, the functions are added again. Problem also happens even if I double click to add the member function, but immediatly click cancel.
Any suggestions?
Thanks in advance!
Mike
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VC6 was some time ago, but do you have the correct "insertion point comments" in your message map?
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Hi Niklas - thanks for helping.
This is what my generated message map looks like after trying to add a member:
// Generated message map functions
//{{AFX_MSG(CDanuDlg)
virtual BOOL OnInitDialog();
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
virtual void OnOK();
afx_msg void OnButton1();
virtual BOOL OnInitDialog();
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
virtual void OnOK();
afx_msg void OnButton1();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
its slightly different from what you suggested, as it has //{{AFX_MSG(CDanuDlg) - I think this is right however.
Cheers
Mike
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The ones I suggested should be inside your message map, between BEGIN_MESSAGE_MAP and END_MESSAGE_MAP in the cpp-file.
One idea could be to generate a new MFC dialog class, and compare all those generated comments to the ones in your dialog.
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Hi Niklas
I have got to the bottom of this now (after a spending the day trying to work out where it was going wrong)!
In my message map, I had something like this declared:
ON_COMMAND_RANGE(IDC_BUTTON_1, IDC_BUTTON_4, OnMyFunction)
OnMyFunction had been declared as a normal function (void OnMyFunction()). As soon as I moved it to the right message map (afx_msg void OnMyFunction()) problem was solved!
AAAAAGGGGHHHH what a waste of time!
Thanks for your input though!
Mike
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In Process Explorer software
have function view handles of process
i don't know how to get handles same that function
someone give me idea>?
thanks so much
sorry if my english is not good
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Maybe check this[^] as a starting point, it has source code for you to examine.
> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> //TODO: Implement signature here<
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thanks
very clearly  ..
i'll try
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If you want to retrieve the number of opened handles by given process you can use GetProcessHandleCount[^]. Note that minimum supported clients for this function are Windows Vista and Windows XP with SP1.
If you want to support older windows versions you can use NtQuerySystemInformation[^]. Look for SYSTEM_PROCESS_INFORMATION class and read the documentation carefully before using this function.
I hope this helps.
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thanks.
i 'll research...do you have a help document for me?
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Well I already gave you the link to the documentations of two APIs.
The usage of GetProcessHandleCount is trivial, documentation says everything you need.
For NtQuerySystemInformation you can check out this[^] thread, where you will find a sample code that actually retrieves Handle Count, Thread Count, etc.
The example code actually uses ZwQuerySystemInformation[^] function but in fact this does not change anything for you, the usage is exactly the same.
P.S. If you actually want to know the difference between 'Nt' and "Zw' prefixed native API functions, have a look at this interesting article[^].
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Hi, I'm writting a simple client/server program using microsoft RPC. The client should specify server's system user name and valid password in each RPC procedure, otherwise server reject the RPC request. I do not know how to do it. Please give me some advise. Thank you.
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Can I put DllName.OtherName.OtherName.dll as my Win32 dll name.
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Yes.
I am a HUMAN. I have that keyword in my name........
 _AnsHUMAN_
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Hi ,
i have an interger x=10; i want to write this by assigning it to const unsigned char variable.
whenever i tried to write in file it increase the file offset by 2. for e.g if before writing file offset was 152 after writing it become 154.
But i wrote 9 or 11 or any other number than 10 ,it increase offset by 1 means offset increase from 152 to 153.
it works fine on Linux but giving issue on windows.
Regards,
Sachin
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The value 10 in binary means a new line character.
In Windows, a new line is converted to a new line / carriage return character pair.
Linux and Unix do not do this.
Thats the reason for this behavior.
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Thanks Santosh for quick reply ,
Can you please help me to write a value 10 in a file .I have an integer with value 10.I do typecasting to store in unsigned char which i pass in fwrite() as parameter.
If in windows writing 10 to file treat as different operation as mentioned above, Can you please suggest me alternate way to write value 10 in file i.e. in which format I should pass parameter to fwrite()
Regards,
Sachin
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Thanks once again Santosh.
I got the issue,Actually i was creating file in 'w' mode instead of 'wb'.
with 'wb' mode ,it is working fine.
Thanks,
Sachin
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If it ain't text, don't pretend it is text; use binary mode instead.
Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum
Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.
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Hello Friends
Is there a way in which we can capture screenshot of a game built in direct x.
I registered a shortcut key using RegisterHotKey to display a test messagebox, launched Star Wars and pressed the shortcut key configured.
No messagebox appeared and hence it seems that the system wide shortcut keys of keyboard registered using RegisterHotKey do not work.
Or it means that Direct X creates it's own secure environment in which no other software made in directx or win32 or c++ can internein ?
Regards
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Hi All,
I am working on my college project "Virtual Keyboard Video Mouse (vKVM) Server using C on LINUX". (Probably Server will have Graphics Data available in provided memory location)
I searched on Internet. It's similar to to "Virtual Networking Computing (VNC)" & "Remote Desktop". VNC uses Remote Frame Buffering (RFB) Protocol for it. I studied "LibVNCServer" but couldn't use it.
Please suggest me how to approach for this project? How should I start writing code for it? Initial requirement of project is Basic Server to transmit video/desktop data is also fine.
Please help me for that.
Thanks & Regards,
Aniket A. Salunkhe
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Aniket Salunkhe wrote: I studied "LibVNCServer" but couldn't use it.
In that case you are going to have to write your own versions of the client and the server modules. I suspect that this is not a trivial task and an understanding of the existing libraries is a prerequisite. If you mean that you cannot understand these libraries then you probably need to reconsider the task you have set yourself.
I must get a clever new signature for 2011.
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