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Your bug is that you don't allocate any space to hold the text. You pass an uninitialized pointer (str). And you give the buffer length as 0.
--Mike--
http://home.inreach.com/mdunn/
#include "buffy_sig"
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when i try to debug with the break point inside this function, I observe that it breaks when I click the button DISPLAY.
LVN_ITEMCHANGED gets sent whenever any property of an item changes, including when an item is added/deleted to/from the list. If you want to act only when the selection changes, compare the old and new states of the item (which are sent with the message) and act only if their LVIS_SELECTED bits are opposite.
--Mike--
http://home.inreach.com/mdunn/
#include "buffy_sig"
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Hi
I serialized my data in an xml file but how can I open or save them using
Document view architecture.I want to read data from document and use it in view.
I will be glad if I get a clear answer.
Thanks
Pathi Gorantla
bhikshapathi_g@semanticspace.com
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You have to override CDocument::OnOpenDocument and CDocument::OnSaveDocument. Do not call base class implementaion - just open your own file and read/write.
Tomasz Sowinski -- http://www.shooltz.com.pl
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Yeah I am trying to override OnOpenDocument() but i cant get the data from file into the document.I declared DISPPARAMS pointer in document and trying to get the data read from file into this pointer but getting an error.my aim is to read from file and show it in view.
my code is
void componentView::fileOpen()
{
isFileOpen=true;
CFileDialog file(true,
NULL, NULL,
OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,
NULL, GetParent());
file.DoModal();
CString filep=file.GetPathName();
BSTR filepath;
TCHAR szStringRepresentation[200];
wsprintf ( szStringRepresentation, _T("%s"), filep );
filepath=_bstr_t(szStringRepresentation) ;
CClientDC cdc(this);
CPen penStroke(PS_SOLID, 1, RGB(0,0,0));
cdc.SelectObject(&penStroke);
parse pa;
DISPPARAMS var=pa.readFile(filepath);
DISPPARAMS *params;
params=&var;
VARIANT myVars[2];
VariantInit(&myVars [0]);
myVars[0].vt=VT_ARRAY|VT_I4;
myVars[0]=params->rgvarg[0];
VariantInit(&myVars [1]);
myVars[1].vt=VT_ARRAY|VT_I4;
myVars[1]=params->rgvarg[1];
SAFEARRAY* SXArray;
SAFEARRAY* SYArray;
SXArray=myVars[0].parray;
SYArray=myVars[1].parray;
long lxbound,lybound;
long uxbound,uybound;
SafeArrayGetLBound(SXArray,1,&lxbound);
SafeArrayGetUBound(SXArray,1,&uxbound);
SafeArrayGetLBound(SYArray,1,&lybound);
SafeArrayGetUBound(SYArray,1,&uybound);
VARIANT ptVar;
VariantInit(&ptVar);
ptVar.vt=VT_BSTR;
int i,j,k,l;
for(long p=lxbound;p<=uxbound;p++)
{
SafeArrayGetElement(SXArray,&p,(&ptVar.bstrVal));
i=strtol(_bstr_t(ptVar.bstrVal),NULL,10);
SafeArrayGetElement(SYArray,&p,(&ptVar.bstrVal));
k=strtol(_bstr_t(ptVar.bstrVal),NULL,10);
p++;
SafeArrayGetElement(SXArray,&p,(&ptVar.bstrVal));
j=strtol(_bstr_t(ptVar.bstrVal),NULL,10);
SafeArrayGetElement(SYArray,&p,(&ptVar.bstrVal));
l=strtol(_bstr_t(ptVar.bstrVal),NULL,10);
cdc.MoveTo(i,k);
cdc.LineTo(j,l);
}
}
I did in view but how can I read file in document and draw the lines in view?
bhikshapathi_g@semanticspace.com
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> I did in view but how can I read file in document and
> draw the lines in view?
You should read the file in OnOpenDocument and store the data in your document class. Use this data in overrided OnDraw in view class and draw whatever you want.
Tomasz Sowinski -- http://www.shooltz.com.pl
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Hi!!!
I need to send a keysrtoke to another application. There is no problem if I simply send a key (for example F2). The problem appears if I want to send a key combination like Ctrl+F2 
Prease, help me!!!
SOS!!!
Thank you for your attention.
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You're gonna want to look up SendInput API function... Basically build an array of INPUT strcutures with (using virtual key codes) control down, f2 down, f2 up, control up. Then BlockInput (TRUE), stick that array into SendInput and fire it off, then BlockInput (FALSE).
It should work semi decent in NT/2k, but in 98, things get sh*tty if your INPUT array contains more than 75 fields... Still haven't gotten around that... Good luck
--
Peace,
Amit Jain
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I am writing a payroll software...I am having problem in print preview..... I can print preview if use 17 inch monitor but if i use the 14 inch monitor all the text are miss placed...
Why????
okie
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Because you're printing to too big a size. Your 14 " monitor no doubt is running at a lower resolution than your 17 ".
Are you printing relative to the size of your printed page ? Are you working out how big the page is ?
Christian
#include "std_disclaimer.h"
People who love sausage and respect the law should never watch either one being made.
The things that come to those who wait are usually the things left by those who got there first.
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Even when I change the resolution the same thing happens....I already check the page setting its A4 size.....
okie
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Wait a minute - no matter what the screen resolution, the page doesn't fit on a 14" monitor and it does on a 17" monitor ? I think it's time for some details, like the resolutions you've used, some code, etc.
Christian
#include "std_disclaimer.h"
People who love sausage and respect the law should never watch either one being made.
The things that come to those who wait are usually the things left by those who got there first.
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I am new to C++ and am self-teaching myself. I am trying to build a console app to perform several operations. One is the get the username. I keep getting an ERROR 122 (ERROR_INSUFFICIENT_BUFFER).
Can anyone look at my code and give assistance?
Here is my code:
================
char lpBuffer[256] = {0};
unsigned long nSize;
long lRetCode;
.
.
.
int GetUsrName()
{
lRetCode = GetUserName(lpBuffer,&nSize);
lRetCode = GetLastError();
if (lRetCode != ERROR_SUCCESS) {
LastError();
}
return (0);
}
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According to the documentation, nSize recieves the size of the buffer required - have you checked this value ?
Christian
#include "std_disclaimer.h"
People who love sausage and respect the law should never watch either one being made.
The things that come to those who wait are usually the things left by those who got there first.
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You must initialize nSize with the size of your buffer (256) before calling GetUserName().
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Hy!
Actualy the 'nSize' parameters is an in/out parameter. This mean that when the function s called it should contain the size of the buffer in witch user name will be stored and when the function return it will contain the real number of characters contained in user name
Bye,
Orbital
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I have made changes to the code and it now returns the Username however, I also now get a different error: (997) ERROR_IO_PENDING.
Here is the new code:
TCHAR lpBuffer[256];
unsigned long nSize = 256;
.
.
.
GetUserName(lpBuffer,&nSize);
printf("UserName:\t%s\n",lpBuffer);
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Try this one:
char UserName[MAX_USERNAME_LEN];
DWORD len = MAX_USERNAME_LEN; GetUserName(UserName, &len);
Hope this helps
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Hi all,
Do C++ got Panel like in Java ??
Let say if I want to create something like panel, how should I do it? Can I use group box to group everything together? I tried but it doesn't show like what panel can do. eg: can't hide every controls in that group.
Thanks. 
FMansor
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Normally if you create any window and create child windows (controls) related to it. Then you can just hide the main window and all is hidden!
Group box or normal static controls can do the job! However, if you are using the resource editor, then do the following:
in your WM_INITDIALOG try to make your group box the parent for the controls by calling SetParent. I am not sure if this will change their position, but give it a try!
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I've tried to create a MainFrame app in MS VC6 by using the templates in VC6. I select creating an app using MFC with no documents, and what results is an app that only has a frame. Good! Yet when I compile the app and run it, the frame paints and dumps a deadly error from mfcocc with Abort Retry or Fail. The only option is to Abort. I have tried to look at the template for any problem, but I must admit, I'm only a novice. Any hints?
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Hi!
How do you get access to the file name that you double click on, in the file explorer/ or on the desktop.
I have a custom application and a custom file extension. The application gets launched whenever I double
click on a file with that extension. However I am trying to obtain the name of the file that was double clicked.
AB
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Did you check the command line?
Look at GetCommandLine() API!
Mh2!
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Thanks!
Actually I was checking the command line, but when I created the registry key for my extension, I had not included the
%1 option! duh!
ab
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Hi, I have a couple of questions regarding the usage of DLLs in a single process from within several threads. I am using dynamically loaded DLLs (to borrow a term from elsewhere on this website), that is I am calling AfxLoadLibrary and then GetProcAddress to find my functions. All of the dlls and the exe are built using MFC as a shared library. Please do not tell me I should be using COM to address any of these issues 
1. Is there a way that the main thread in the EXE can call AfxLoadLibrary while a worker-thread is inside of a function in the DLL w/o causing lots of nasty problems? Right now I have hacked up a solution where it suspends any threads it thinks might be using the DLL, and it seems to work, but it causes memory leaks since that thread probably allocated memory inside of the DLL functions it might have called.
2. On a completely different note, would there be a way to call AfxLoadLibrary within each thread, and have each thread obtain its own HINSTANCE so that each thread could call AfxFreeLibrary independently of the others? I have tried to do this, and noticed that all copies of the dll functions seem to be the same. I know that in general, DLLs are loaded on a process basis rather than a thread basis, and was wondering if there was a way to override this behavior? If this were possible, #1 wouldn't be so much of an issue.
3. What is the safest way to share CWnd objects between threads, and within functions inside of DLLs? Basically, the main EXE opens the HINSTANCE to the dll, and then creates a separate thread to perform various lengthy operations in DLL functions, passing the thread an HWND (window created in EXE), and the thread then passes that HWND as an arguement into the GetProcAddress(ed) function. Inside the DLL, I call: CWnd::FromHandle. This seems to work if I use functions like SetWindowText or SendMessage, but does not work if I call PostMessage on that HWND (or use the CWnd wrapper). Since using SendMessage is dangerous because I don't want to overload the EXEs message pump, I'd really like to be able to use PostMessage. One weird issue here is that CStatic::SetWindowText works fine, while CProgressCtrl::SetPos does not seem to have any effect.
Mach5 Enterprises, LLC. http://www.mach5.com/
"Web Intelligence for the New Economy"
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