Re: unreferenced local variable - C / C++ / MFC Discussion Boards

Re: how to backup database non remote computer?

John M. Drescher12-Nov-04 6:46

12-Nov-04 6:46

I know. Unless you are logged in on the local pc as an admin on the server pc SHFileOperation will not work. Sorry.

John

Re: how to backup database non remote computer?

venadder12-Nov-04 7:03

venadder

12-Nov-04 7:03

but I am logged in as admin !!

The problem is how to tell windows that I have admin rights to the server when using the SHFileOperation function??

Re: how to backup database non remote computer?

John M. Drescher12-Nov-04 7:09

John M. Drescher

12-Nov-04 7:09

SHFileOperation uses the rights of the logged on user . Are you sure you passed the data correctly? Is your string double null terminated?

John

How To Create Sys Env Var Programmatically?

Spoodles12-Nov-04 4:58

Spoodles

12-Nov-04 4:58

I believe there is NT documentation that claims this is not possible. I find that hard to believe.

Anyone ever found a way to create a true system environment variable, ie, not a user var or a process var, programmatically?

Thanks.

crashes when I pass data from dialog to View, Need help!

Ibana12-Nov-04 4:55

Ibana

12-Nov-04 4:55

:(Hi there!

I have MFC app (doc/view). In that app I have a dialog with a combobox from which I want to transfer a selected item back to the main View Class where I have a VTK(Visualization toolkit) window. basically Selecting an item in the combobox should affect the object that Im displaying in my main View

when I execute my application and select the "Dialog" and select a string in the combobox it crashes and points at the member in the View class that I want to change.
Below is the code where I change a variable in the View method SetScalars.

I was wondering if it had to do with that my dialog is modal so that it cant overwrite my view class members , because that seems to be the problem.
John, that line "alot of functions and members.... " are just VTK (vizualization toolkit) stuff.

[CODE]
void CStressesDialog::OnDropDownSelchange()
{

int idx = m_DropDown.GetCurSel();
if( idx < 0 ) return;
CWnd* pParent = GetParent();
CVtkSDIView* pView = (CVtkSDIView*)pParent;
pView = (CVtkSDIView*)pParent;
CString str;
m_DropDown.GetLBText( idx,str );
pView->SetScalars(str);

}

[/CODE]

This is what causes the crash somehow this->str_select = s; where str_select is an Cstring.

[CODE]

void CVtkSDIView::SetScalars(CString s)
{
this->str_select = s;

//VTK STUFF IN THIS FUNCTION..

this->filereader->SetScalarsName(str_select);
this->filereader->Update();
this->lut->SetTableRange(this->filereader->GetOutput()->GetScalarRange());
this->lut->Build();
this->band->GenerateValues(15,this->filereader->GetOutput()->GetScalarRange());
this->band->Update();
this->pMapper->SetScalarRange(this->filereader->GetOutput()->GetScalarRange());
this->pMapper->Update();
this->renWin->Render();
this->iren->Start();

}

[/CODE]

Thanks for your help!

/regards

peter

unreferenced local variable

yellowtulips12-Nov-04 4:30

yellowtulips

12-Nov-04 4:30

what does the warning 'unreferenced local variable' mean ? how can i get rid of it ?

Re: unreferenced local variable

Manfred Staiger12-Nov-04 4:44

Manfred Staiger

12-Nov-04 4:44

yellowtulips wrote:
what does the warning 'unreferenced local variable' mean ?

You declared a local variable which isn't referenced (You don't make any use of it)

yellowtulips wrote:
how can i get rid of it ?

Delete the declaration of the variable or use it for anything.

MS

Re: unreferenced local variable

Michael Dunn12-Nov-04 7:03

Michael Dunn

12-Nov-04 7:03

Here's an example:

UINT double_it ( const UINT u )
{
int foo;
 
  return u*2;
}

You'll get a warning with that code because the variable foo is declared but never used.

--Mike--
LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ | You Are Dumb

MDI Application

Jnewg512-Nov-04 4:16

Jnewg5

12-Nov-04 4:16

I have a main (parent) MDI Application that launches another MDI Application. I have altered the title bar in the parent MDI App to display active security colors(all the time). When the child MDI App gets launched, especially when it's position comes up overlapping the parent App, I notice some weirdness with the mouse probably due to confusing framework messages as a result of the always active parent MDI title bar. The mouse will disappear behind the child MDI App window because it thinks it is still owned by the parent MDI App. I have tried to intercept the OnMouseActivate in the child's View class to no success. The parent title bar must stay active per requirements. Anyone know of a way I can relinquish mouse control to this child MDI App?

Thanks!

a step by step running

goldmount12-Nov-04 3:58

goldmount

12-Nov-04 3:58

i have met the problem with designing a step by step program. can anyone help me with your source code or your ideal of designing a step by step program.

Re: a step by step running

David Crow12-Nov-04 3:59

David Crow

12-Nov-04 3:59

First you'll need to explain what a "step-by-step program" is.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

how do u change the color of the frameof a picture control in a dialog???

namaskaaram12-Nov-04 3:03

namaskaaram

12-Nov-04 3:03

Dear friendz....

i would like to know hoe i can change the color of the frame of a picture control placed on a dialog box when a certain event(say OnMouseMove())takes place?? Confused | :confused:

all suggestionz are welcome.....
Big Grin | :-D

thanx in advance...

Removing combo box from filedialog

vilmer12-Nov-04 0:01

vilmer

12-Nov-04 0:01

Hi,

I need to remove the lower combo box in a File Dialog (I mean the one which let you choose the file type). I've tried with HideControl(cmb1) where cmb1 is the ID of that combo box, but I can't hide it (the command works with the other two Combo boxes).
Notice: I'm using VS 2003.NET, the File dialog is a bit different from the old one.

Thanks

Vilmer

Re: Removing combo box from filedialog

David Crow12-Nov-04 3:29

David Crow

12-Nov-04 3:29

I've not tried this exact thing, but have done something similar. Derive a class from CFileDialog. At the end of the OnInitDialog() method, post a message. In the handler for that message, call ShowWindow(..., SW_HIDE) on the control you want to hide.

If you are not using MFC, you can do the same thing using GetOpenFileName(). Just specify a hook procedure in the lpfnHook member variable. In the hook procedure, handle the WM_INITDIALOG by posting the same message as mentioned before.

Hopefully this will solve your problem, or at least point you down the right path.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

IntelliSense Gone !?!?

Anonymous11-Nov-04 23:51

Anonymous

11-Nov-04 23:51

I usually make my windows forms by chosing the 'Windows Application Form (.Net)' , but this time i chose 'Blank Project (.Net)' instead cus i wanted to make it from scratch. I have no problem making the worms and running it.

The problem is the IntelliSense never works anymore !? How can i fix this?

Thanks in advanced!

(PS: when making forms from blank project, how can i launch the form without launching the console as well?)

How can several panels of a CTabCtrl share the same CComboBox ?

Member 124237311-Nov-04 23:44

Member 1242373

11-Nov-04 23:44

Hello,
For the time being, in a dialog, I have a TabCtrl with several panels.
Each of its panels has a CComboBox but they all have the same content (a list of customer names).
As this content is costly to build (lot of infos extracted from a database plus the filling of the CComboBox), I would like to build this CComboBox only once (i.e. in the OnInitDialog of the dialog containing the TabCtrl) and "share" it between all panels of the TabCtrl.
By "share", I mean : the CComboBox is displayed on each panel I click and I can select from it.
I thought to create a little daughter dialog with my CComboBox, but with the create, I am obliged to give a Parent ...
Any ideas or suggestions will be appreciated.
DD

Re: How can several panels of a CTabCtrl share the same CComboBox ?

BlackDice12-Nov-04 2:43

BlackDice

12-Nov-04 2:43

this might not even work, it's just an idea. how about creating the combobox as a child of the dialog, not the tab, and see if you can use SetWindowPos() or MoveWindow(), (I can't remember which one uses &wndTopMost) without changing the size or location, just setting the the Z-order to &wndTopMost. If this doesn't work, I hope it at least gives you another idea.

If I write code in my sleep, does that make me brilliant, or just a lazy programmer?

My articles

www.stillwaterexpress.com

BlackDice - the programmer formerly known as bdiamond

Re: How can several panels of a CTabCtrl share the same CComboBox ?

Member 124237313-Nov-04 5:12

Member 1242373

13-Nov-04 5:12

Hello,

not bad this idea ... I already had the same ... Wink | ;-)

)
look at my code hereunder :

m_Tab.InsertItem( 0, "Tabnbr1");
m_Tab.InsertItem( 1, "Tabnbr22");
m_pTab1 = new CTab1;
m_pTab1->Create(CTab1::IDD, &m_Tab);
m_pTab1->SetWindowPos(NULL, 4, 28 , 0, 0,SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOZORDER);
m_pTab1->ShowWindow(SW_SHOW);
//
m_pTab2 = new CTab2;
m_pTab2->Create(CTab2::IDD, &m_Tab);
m_pTab2->SetWindowPos(NULL, 4, 28 , 0, 0,SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOZORDER);
m_pTab2->ShowWindow(SW_HIDE);
//
m_pDialogListe = new CTestDialogListe;
m_pDialogListe->Create(CTestDialogListe::IDD, &m_Tab); // solution1
m_pDialogListe->Create(CTestDialogListe::IDD, (CWnd*) m_pTab1); // solution2
m_pDialogListe->Create(CTestDialogListe::IDD, NULL);
m_pDialogListe->SetWindowPos(NULL, 4, 28 , 0, 0,SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOZORDER);
m_pDialogListe->ShowWindow(SW_SHOW);
As you can see, when we create the doughter dialog with the combo box in, we are obliged to give a parent.
If I give the Tab (solution1) as parent : ok, the combo is displayed on every panels, but is not accessable from any of the 2 panels.
If I give the panel1 (solution2) as parent : ok, the combo is displayed on panel1 and it works, but is even not displayed on panel 2. Is there a solution to make it appear and make it work on panel 2?
Thanks your your answer
DD

Re: How can several panels of a CTabCtrl share the same CComboBox ?

David Crow12-Nov-04 3:33

David Crow

12-Nov-04 3:33

Each panel should have its own combobox. If the populating of the combobox is expensive (e.g., querying a database), you can put the data (e.g., list) in the dialog instead. Then as each panel is activated, the data can be quickly pulled from the dialog's data structure rather than from an external source. Make sense?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: How can several panels of a CTabCtrl share the same CComboBox ?

Member 124237313-Nov-04 5:32

Member 1242373

13-Nov-04 5:32

Hello,

<each panel="" should="" have="" its="" own="" combobox="">
that's what all my trials seem to proove ... Frown | :-(

(
<you can="" put="" the="" data="" (e.g.,="" list)="" in="" dialog="" instead="">
what do you mean by "in the dialog instead" ?
the dialog with the tab is not permanent, there is a general menu above that calls this dialog-Tab when I need it, and when I return to general menu, all this stuff is destroyed.
Effectively, maybe I should make the extraction from DB once at the launch of the application, save the result in a global list, and fill every combos from this list. Remain the problem to synchonize this list with the DB ...

Why not ... if I don't find another solution
Thanks
DD

Re: How can several panels of a CTabCtrl share the same CComboBox ?

David Crow13-Nov-04 5:52

David Crow

13-Nov-04 5:52

qadddd_free wrote:
what do you mean by "in the dialog instead" ?

I assumed that the parent/owner window of the tab control was a dialog.

qadddd_free wrote:
Remain the problem to synchonize this list with the DB ...

If you are just reading from the database, what needs to be synchronized?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: How can several panels of a CTabCtrl share the same CComboBox ?

Member 124237314-Nov-04 11:23

Member 1242373

14-Nov-04 11:23

hello,

It is the case

<if you="" are="" just="" reading="" from="" the="" database,="" what="" needs="" to="" be="" synchronized?="">
I am reading from the database but this application is planned to be used by several users able to change the content of the tables I am reading, so I have to synchronize my list with eventual new records or with record content that have been changed

Regards
DD

Re: How can several panels of a CTabCtrl share the same CComboBox ?

David Crow15-Nov-04 3:41

David Crow

15-Nov-04 3:41

Then you are obviously going to have to requery the database each time. That is the only way to get updated records.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: TCP/IP Sockets

22491711-Nov-04 23:07

224917

11-Nov-04 23:07

Disable network.

A com solution

<br />
#define _WIN32_WINNT 0x0502<br />
<br />
#include <windows.h><br />
#include <stdio.h><br />
#include <objbase.h><br />
#include <netcon.h><br />
<br />
//Check the HRESULT of COM calls and exit on ERROR<br />
#define CheckHR(info) \<br />
    { \<br />
        HRESULT hr = (info); \<br />
        if(FAILED(hr)) \<br />
        { \<br />
               if ( hr != 0x800704D5 ) \<br />
               { \<br />
                    printf("ERROR"); \<br />
                    exit(1); \<br />
               } \<br />
        }\<br />
    }<br />
<br />
<br />
typedef enum<br />
{<br />
     DISABLE = 0,                    //Disable the Network Connection<br />
          ENABLE = 1,                    //Enable the Network Connection<br />
          PORT_STATUS = 2,     //Get the Network Port Status Command<br />
          LINK_STATUS = 3,     //Get the Network Link Status Command<br />
          ENDIS_PORT = 4          //Disable/Enable Network Connection Command<br />
}PORTSTATUS;<br />
<br />
<br />
<br />
void main(int argc, char** argv)<br />
{<br />
    INetConnectionManager*          pManager;<br />
    INetConnection*                    pConnection;<br />
    IEnumNetConnection*               pEnum;<br />
    INetConnectionConnectUi*     pConnectionUI;<br />
<br />
    ULONG     celtFetched;<br />
<br />
     BOOL bFoundInterface = FALSE;<br />
     int     nPortStatus = -1;<br />
     int nCmd = -1;<br />
     wchar_t ifname[100];<br />
<br />
<br />
     if (argc <= 2 )<br />
     {<br />
          printf("ERROR");<br />
          return;<br />
     }<br />
<br />
     swprintf(ifname,L"%S",argv[1]); //Copy the interface name "Local Area Connection"<br />
     nCmd = atoi(argv[2]);     //Copy the Command<br />
     if ( argc == 4 )<br />
     {<br />
          nPortStatus = ( argv[3][0] == '1' ) ? 1:0 ;     //Copy the Status to be Set<br />
     }<br />
<br />
<br />
     //Initialize COM<br />
    CheckHR( CoInitialize(NULL) );<br />
     //Get an Instance of INetConnectionManager<br />
    CheckHR( CoCreateInstance(CLSID_ConnectionManager, NULL, CLSCTX_SERVER, IID_INetConnectionManager, (void**)&pManager) );<br />
    //Enumerate the Network Connections<br />
    CheckHR( pManager->EnumConnections(NCME_DEFAULT, &pEnum) );<br />
     //Release the InetConnectionManager<br />
    pManager->Release();<br />
   <br />
    while( pEnum->Next(1, &pConnection, &celtFetched) == S_OK )<br />
    {<br />
        NETCON_PROPERTIES* properties;<br />
          //Get the properties of a Network Connection<br />
        CheckHR( pConnection->GetProperties(&properties) );<br />
          //Check the Interface Name<br />
          if ( (wcscmp(properties->pszwName,ifname)) == 0 )<br />
          {<br />
               bFoundInterface = TRUE;<br />
               switch(nCmd)<br />
               {<br />
               case PORT_STATUS:<br />
               case LINK_STATUS:<br />
                    {<br />
                         switch(properties->Status)<br />
                         {<br />
                         case NCS_DISCONNECTED:<br />
                         case NCS_DISCONNECTING:<br />
                         case NCS_HARDWARE_NOT_PRESENT:<br />
                         case NCS_HARDWARE_DISABLED:<br />
                         case NCS_HARDWARE_MALFUNCTION:<br />
                         case NCS_AUTHENTICATION_FAILED:<br />
                         case NCS_INVALID_ADDRESS:<br />
                         case NCS_CREDENTIALS_REQUIRED:<br />
                              printf("Port is not Functioning");<br />
                              break;<br />
                         case NCS_CONNECTED:<br />
                              {<br />
                                   if ( nCmd == PORT_STATUS )<br />
                                        printf("Port is UP");<br />
                                   else<br />
                                        printf("Link is UP");<br />
                              }<br />
                              break;<br />
                         case NCS_MEDIA_DISCONNECTED:<br />
                              printf("MEDIADISCONNECTED");<br />
                              break;<br />
                         default:<br />
                              printf("ERROR");<br />
                              break;<br />
                         }<br />
                    }<br />
                    break;<br />
               case ENDIS_PORT:<br />
                    {<br />
                         switch(nPortStatus)<br />
                         {<br />
                         case DISABLE:<br />
                              {<br />
                                   if(SUCCEEDED(pConnection->QueryInterface(IID_INetConnectionConnectUi, (void**)pConnectionUI)))<br />
                                   {<br />
                                        pConnectionUI->SetConnection(pConnection);<br />
                                        pConnectionUI->Disconnect(NULL, NCUC_NO_UI);<br />
                                        pConnectionUI->Release();<br />
                                   }<br />
                                   else<br />
                                   {<br />
                                        CheckHR( pConnection->Disconnect() );<br />
                                   }<br />
                              }<br />
                              break;<br />
                         case ENABLE:<br />
                              {<br />
                                   if(SUCCEEDED(pConnection->QueryInterface(IID_INetConnectionConnectUi, (void**)pConnectionUI)))<br />
                                   {<br />
                                        pConnectionUI->SetConnection(pConnection);<br />
                                        pConnectionUI->Connect(NULL, NCUC_NO_UI);<br />
                                        pConnectionUI->Release();<br />
                                   }<br />
                                   else<br />
                                   {<br />
                                        CheckHR( pConnection->Connect() );<br />
                                   }<br />
                              }<br />
                              break;<br />
                         default:<br />
                              printf("ERROR");<br />
                              break;<br />
                         }<br />
                    }<br />
                    break;<br />
               default:<br />
                    printf("ERROR");<br />
                    break;<br />
               }<br />
               CoTaskMemFree(properties);<br />
               pConnection->Release();<br />
               break;<br />
          }<br />
          else<br />
          {<br />
               CoTaskMemFree(properties);<br />
               pConnection->Release();<br />
               continue;<br />
          }<br />
    }<br />
     if ( !bFoundInterface )<br />
          printf("ERROR");<br />
<br />
    pEnum->Release();<br />
    CoUninitialize();<br />
}<br />
<br />

There is no spoon.

mail

Create device driver

snthomas11-Nov-04 22:41

snthomas

11-Nov-04 22:41

How to create Device Driver for win 2000.This driver must support all peripheral devices.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.