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I have a program that uses a Progress bar , but when i try to minimise the dialog window during execution or activate some other program ,
and then return back to the dialog seems to get freezed
, progress bar status does not increment ,
HOWEVER the program run correctly in the background and after its execution completes the dialog freeze end and it is displayed currectly .
Any suggestions ??
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It sounds like the classic "preemption" problem. Your application is blocking while doing its processing, thus not allowing the dialog's message pump to process messages. Read Joe Newcomer's article on thread management[^].
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hi yashraj,
Execute the background process in a seperate thread(Worker thread will do). Increment the progress bar from the thread.
mahesh
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Another problem when mixing pure "C" code and C++...
I'm adapting a DLL to use some pure "C" functions.
I have some modules in pure "C" puro and othersin C++.
In my module "ExportedFunctions.cpp" I have declared DLL exported functions... In this module the call to functions of class "login" are made:
login.createWindow(hwnd);
login.makeConexion(CString(operador), CString(senha), &lservidor );
In the file "ExportedFunctions.cpp" I have declared the class:
CLogin login;
In the module "login" I have declared as "public:" this functions:
public:
void createWindow(CWnd *pParent);
void makeConexion(CString operador, CString senha, CStringArray servidores);
These is working...;)
But now I have another modul (contcp.c), in pure "C"... And I have tried many ways to call fnEntrada from inside "ExportedFunctions.cpp" to a Function of "C" module without success! I #include "contcp.h" in "ExportedFunctions.cpp" and/or in "ExportedFunctions.h", but always occurs link error:
ExportedFunctions.obj : error LNK2001: unresolved external symbol "int __cdecl fnEntrada(void)" (?fnEntrada@@YAHXZ)
../dlls/Axsceovs2.dll : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.
Somebody may help me??
Cesario
http://cesariosimoes.hpg.ig.com.br
Cesario Simoes, jr
Working with computers since 1970 (Burroughs/GTE). Programming in assembly DSP (TMS320c2x and TMS320c5x), C and C++. Using C++ and MFC, developping GUI to telecommunication equipment (PABX, ACD, RAS, etc.)
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Anywhere you have #include "contcp.h", you need to surround that with the extern keyword as in:
extern "C"
{
#include "contcp.h"
}
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Thank you, David! Ok very simple and I did it but, doesn't result... Remains ocurring the link error:
ExportedFunctions.obj : error LNK2001: unresolved external symbol _fnEntrada
../dlls/Axsceovs2.dll : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.
Another idea?
Cesario Simoes, jr
Working with computers since 1970 (Burroughs/GTE). Programming in assembly DSP (TMS320c2x and TMS320c5x), C and C++. Using C++ and MFC, developping GUI to telecommunication equipment (PABX, ACD, RAS, etc.)
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The problem occurs just this functions. If I declare a variable, this is recognized in the other module... Perhaps is something related with the function declaration? I'm declaring like this:
int fnEntrada();
Cesario
Cesario Simoes, jr
Working with computers since 1970 (Burroughs/GTE). Programming in assembly DSP (TMS320c2x and TMS320c5x), C and C++. Using C++ and MFC, developping GUI to telecommunication equipment (PABX, ACD, RAS, etc.)
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Thanks again, David!
It's ok now! I forget a "static" in front of the function declaration in the .h file... 
Best regards from the lower south of Brazil...
Cesario Simoes, jr
Working with computers since 1970 (Burroughs/GTE). Programming in assembly DSP (TMS320c2x and TMS320c5x), C and C++. Using C++ and MFC, developping GUI to telecommunication equipment (PABX, ACD, RAS, etc.)
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Hi!,
I use this code to get the column number of a CListControl into a CFormView. It works fine.
But It work for right click. I cannot find a Handler for left click. Something like NM_LCLICK unstead of NM_RCLICK.
BOOL CDataBaseManagerView::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
HD_NOTIFY *pHDN = (HD_NOTIFY*)lParam;
LPNMHDR pNH = (LPNMHDR) lParam;
// wParam is zero for Header ctrl
if( wParam == 0 && pNH->code == NM_RCLICK )
{
// Right button was clicked on header
CPoint pt(GetMessagePos());
CHeaderCtrl* pHeader =(CHeaderCtrl*)m_wndListCtrl.GetHeaderCtrl();
pHeader->ScreenToClient(&pt);
// Determine the column index
int index = 0;
CRect rcCol;
for( int i = 0 ; Header_GetItemRect(pHeader->m_hWnd, i, &rcCol) ; i++ )
{
if( rcCol.PtInRect( pt ) )
{
index = i;
break;
}
}
CString str;
str.Format("Column no: %d", index);
AfxMessageBox(str);
}
return CFormView::OnNotify(wParam, lParam, pResult);
}
any ideas?
Thanks
Everything's beautiful if you look at it long enough...
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I found It!!
BOOL CDataBaseManagerView::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
//unstead of: HD_NOTIFY *pHDN = (HD_NOTIFY*)lParam;
// and: LPNMHDR pNH = (LPNMHDR) lParam;
NMHDR *pHdr = (NMHDR*)lParam;
//unstead of: if( wParam == 0 && pNH->code == NM_RCLICK )
if(pHdr->code == LVN_COLUMNCLICK)
{
...
}
return CFormView::OnNotify(wParam, lParam, pResult);
}
Everything's beautiful if you look at it long enough...
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Hi,
For Left Mouse Button, it is just NM_CLICK.
regards
~Hari~
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Hello all,
Suppose I have a workspace with 50 files in it, and I want to print all of them. I couldn't find any 'Print All' option in the File Menu.
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VC's IDE does not have such a feature. You'll need to use another text editor for printing multiple files.
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Just out of curiosity, does VS .NET have this feature?
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I've not used it so I can't say.
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hi Makeover,
.NET does not have this feature.
mahes
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Hi there, I think I need a little help with include files. Let's say I've 4 files: foo.h, foo.cpp, yak.h, yak.cpp.
foo.h has to include yak.h in order to use the classes it has. However yak.h needs a class from foo.h, let's say class bar. If I include foo.h in yak.h everything gets messed up. Can I do sth else? Can extern help me, if yes, how?
Thankx, Themis
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well i usually get around this but not using those classes in my header file except for pointers ( i.e pointer parameters and member variables ) If you do that than all you need to do is include a class prototype for the object you are going to be using at the top of the file. If you a non-pointer variable you must use the header file because it will try to construct the object and hence require knowledge of the implementation.
Joseph Dempsey
joseph_r_dempsey@yahoo.com
"Software Engineering is a race between the programmers, trying to make bigger and better fool-proof software, and the universe trying to make bigger fools. So far the Universe in winning."
--anonymous
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I have array of characters.I want to send it as a parameters to other function and this character may contain '0',when I do it like the code below,it only pass up to '0' character.
char c[1000];
for(int i ; i<1000; i++)
c[i] =value;
myfunc(c);
Before the last line it containcorrect value,but in myfunc() it contain only value up to '0' value.So how can I pass it correctly?
Mazy
No sig. available now.
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What is the parameter definition of myfunc()? Does it accept a pointer to char?
myfunc(char *);
Kuphryn
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kuphryn wrote:
What is the parameter definition of myfunc()? Does it accept a pointer to char?
myfunc(char *);
myfunc(const char szbody[]);
Mazy
No sig. available now.
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What is the starting value for i? Hint: it ain't 0!
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DavidCrow wrote:
What is the starting value for i? Hint: it ain't 0!
Its 0. Its just miss-typing. 
Mazy
No sig. available now.
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