Re: Taskbar Question - C / C++ / MFC Discussion Boards

C^hris L^osinger19-Jun-02 7:06

19-Jun-02 7:06

you're getting the access violation because AfxGetApp is returning NULL. why it's returning NULL, i can't say without seeing more of your code. where are you calling it from?

-c

Cheap oil. It's worth it!

Image Processing - just like mom used to make.

Re: AfxGetApp() Error

lbishop19-Jun-02 8:45

lbishop

19-Jun-02 8:45

I'm building this as an add-in for visual studio. I'm calling it from CDSAddIn::OnConnection. Here is a description of the thinking behind how it all works and some more code.

So, once in the CDSAddIn::OnConnection() method we store off the current CWinApp's hinstance and threadID. Then the AFX_MANAGE_STATE macro is used to switch the state so that our add-ins access to it's resource's will function correctly. Note that the manage state macro is done after the storing of the hinstance and threadID - if we had switched state before, then the values would be different - what we want is to have the hinstance and threadID for the Developer Studio app.

// This is called when the user first loads the add-in, and on start-up
// of each subsequent Developer Studio session
STDMETHODIMP CDSAddIn::OnConnection(IApplication* pApp, VARIANT_BOOL bFirstTime,
long dwCookie, VARIANT_BOOL* OnConnection)
{
HINSTANCE hInst = AfxGetApp()->m_hInstance;
DWORD threadID = AfxGetApp()->m_nThreadID;

AFX_MANAGE_STATE(AfxGetStaticModuleState());

Border Width of a Control

19-Jun-02 6:16

If you have a CListCtrl, and you set the option to have a border (either through the GUI interface or WM_BORDER option), how do you find the border width ?

Re: Border Width of a Control

Joaquín M López Muñoz19-Jun-02 6:35

Joaquín M López Muñoz

19-Jun-02 6:35

I haven't tried, but I think you can calculate the it by copmuting the difference in width between GetWindowRect and GetClientRect (and dividing by two.)

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Border Width of a Control

Chad Koehler19-Jun-02 7:12

Chad Koehler

19-Jun-02 7:12

Look at ::GetSystemMetrics() in MSDN...

int xBorder = GetSystemMetrics(SM_CXBORDER);
int yBorder = GetSystemMetrics(SM_CYBORDER);

Taskbar Question

19-Jun-02 6:06

Does anyone know the commands to overide your applications taskbar options?? i.e. - change the right click and left click functionality of the box that sits in the taskbar?? How would i replace the right click menu (you know restore/minimize/maximize/close/etc) to a custom menu??

kevin

Re: Taskbar Question

Joaquín M López Muñoz19-Jun-02 6:38

Joaquín M López Muñoz

19-Jun-02 6:38

GetSystemMenu gives you a handle to this menu that you can later use to modify it to your taste.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Taskbar Question

19-Jun-02 7:29

CMenu *TEMPA;

TEMPA = GetSystemMenu(TRUE);
CMenu *TEMPB;
TEMPB = TEMPA->GetSubMenu(0);
TEMPB->InsertMenu(0, MF_BYPOSITION, ID_CASCADE, "&Cascade");

The result is a crash... any ideas?

kevin

Re: Taskbar Question

19-Jun-02 8:16

ok i see it doesnt work like most popups where you have to get the submenu.. my fault - now how do i enable left click functions??? I want my programs child windows to stack and blink ala AOL AIM..

kevin

MFC in VS.NET and _CrtIsValidHeapPointer

mstephens19-Jun-02 5:59

mstephens

19-Jun-02 5:59

Has anyone been having trouble with the new MFC implementation of CString and the debug memory validation code like _CrtIsValidHeapPointer() ?

I am just moving our projects over to VS.NET and it's really pi**ing me off!

I have an extension DLL that seems to cause the problems in CAfxStringMgr::Free() when the program shuts down. I guess compiling release builds may hide this problem but there must still be a problem?!

Anyone got any ideas for working through these issues?

Cheers

ActiveX component can't create object: 'Scripting.FileSystemObject' :(

Vitaly Belman19-Jun-02 5:55

Vitaly Belman

19-Jun-02 5:55

The following used just fine before I reinstalled VC++.. I am not sure what I forgot to install or set:

Set FSO = CreateObject("Scripting.FileSystemObject")

But now this line generates:

ActiveX component can't create object: 'Scripting.FileSystemObject'

Does anyone know what's wrong?

Suspicious | :suss:

Vitaly Belman Suspicious | :suss:

Terminating app smoothly?

User 665819-Jun-02 5:45

User 6658

19-Jun-02 5:45

Hi!

I want to remotely close an app. What I already tried was to use SendMessage() with messages like WM_CLOSE, WM_QUIT, WM_ENDSESSION and so on. I want to close the filesharing program "KaZaA". But for some reason it does not like the messages Wink | ;)

WM_CLOSE: Kazaa simply minimizes itself
WM_QUIT: Nothing happens
WM_ENDSESSION: Kazaa quits, but it crashes Big Grin | :-D

Is there another SMOOTH way to close an app so that it still will be able to finish some tasks before quitting?

thanks in advance

modified 12-Sep-18 21:01pm.

Re: Terminating app smoothly?

Hans Ruck19-Jun-02 5:56

Hans Ruck

19-Jun-02 5:56

Try using Spy focused on Kazaa to see the messages it receives on closing.

rechi

Re: Terminating app smoothly?

User 665819-Jun-02 6:02

User 6658

19-Jun-02 6:02

Seems like Kazaa processes WM_DESTROY and WM_NCDESTROY, but it doesn't help work if I send them via SendMessage()

modified 12-Sep-18 21:01pm.

Re: Terminating app smoothly?

Marc Richarme19-Jun-02 7:05

Marc Richarme

19-Jun-02 7:05

This might be a little tricky, but you could try to simulate the user clicking "Close" in the trayicon menu

Cheers,
Marc
_{Click to see my *real* signature}

Re: Terminating app smoothly?

User 665819-Jun-02 7:07

User 6658

19-Jun-02 7:07

I already thought about this option, but have no clue how to do that Frown | :(

regards

modified 12-Sep-18 21:01pm.

Re: Terminating app smoothly?

19-Jun-02 8:02

try sending WM_SYSCOMMAND, wParam=SC_CLOSE, lParam=0

Re: Terminating app smoothly?

User 665819-Jun-02 8:15

User 6658

19-Jun-02 8:15

This minimizes the window into the tray

modified 12-Sep-18 21:01pm.

Re: Terminating app smoothly?

19-Jun-02 8:54

okay, then send a close request to the mainframe (the parent window which is creating the systray icon and main dialogs).
If Kazza is an MFC application I would send a WM_COMMAND with wParam=ID_APP_EXIT. Or try spying which messages Kazza is sending to itself when terminating.

PS: are you doing a new P2P worm? Smile | :)

Re: Terminating app smoothly?

User 665819-Jun-02 9:16

User 6658

19-Jun-02 9:16

*lol*, no

I'm coding a plugin for a Half-Life/CounterStrike server joining tool, which terminates filesharing programs in order to prevent lags when joining a server.

Back to topic:
It seems line Kazaa sends WM_COMMAND with following values:
wParam 00008066
lParam 00000000

maybe this works Smile | :)

SendMessage(wndKazaa, WM_COMMAND, ???, 0);

with what do I replace the three questionmarks?

modified 12-Sep-18 21:01pm.

Re: Terminating app smoothly?

James R. Twine19-Jun-02 8:09

James R. Twine

19-Jun-02 8:09

Use the aforementioned Spy++ utility to see what message(s) get sent to it when it is closed from the context menu.

Peace!

-=- James.
"Some People Know How To Drive, Others Just Know How To Operate A Car."
[Get Check Favorites 1.4 Now!]

Any samples for inserting an image into a BLOB field of a DB2 table using VC++ 6.0?

Shayna19-Jun-02 5:27

Shayna

19-Jun-02 5:27

Anyone has any sample code for inserting an image into a BLOB field of a DB2 table using VC++ 6.0?

Please help. Cry | :((

Retreiving BSTR

Hans Ruck19-Jun-02 5:09

Hans Ruck

19-Jun-02 5:09

I use this:

STDMETHODIMP CMediaServer::GetUrnList(BSTR *pRetval)
{
  char *sz=global_heart.m_pDataBase->GetUrnList(); // works fine, sz is ok
  if (sz)
  {
    *pRetval=_bstr_t(sz);
    delete [] sz;
  }
return S_OK;
}

to obtain a string from an interface, and this:

BSTR x;

((IMediaServer *)ptr)->GetUrnList(&x); // ptr is ok
_bstr_t xx(x, FALSE);
CString szMan;
szMan.Format("%s", xx);
AfxMessageBox(szMan);

to test the stuff. The string in the message box is something unreadable, so i'm asking: where is the mistake?

rechi

Re: Retreiving BSTR

19-Jun-02 5:19

Bogdan Rechi wrote:
szMan.Format("%s", xx);

The mistake is there

Format takes variable number of args and so xx would not be converted to char*.

The correct way is

CString szMan;
const char* chxx = xx;
szMan.Format("%s", chxx);

Nope (Was: Re: Retreiving BSTR)

James R. Twine19-Jun-02 8:25

James R. Twine

19-Jun-02 8:25

Anonymous wrote:

<br />
CString szMan; <br />
const char* chxx = xx;<br />
szMan.Format("%s", chxx);<br />

That code is attempting to cast a BSTR/_bstr_t to a const char *, which is a no-no.

And, if all you need to so is display the contents of the BSTR as an ASCIIZ string, you can change %s to a %S (uppercase) and it will treat the parameter as a wide string, which is what a BSTR contains:

<br />
// (Typo: "xx" is supposed to be "x", the original BSTR)<br />
// szMan.Format( _T( "%S" ), xx );    // Assuming An ANSI Build Here...  <br />
szMan.Format( _T( "%S" ), x );    // Assuming An ANSI Build Here...  <br />

Peace!

-=- James.
"Some People Know How To Drive, Others Just Know How To Operate A Car."
[Get Check Favorites 1.4 Now!]

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