Re: dynamic memory allocation - C / C++ / MFC Discussion Boards

7stud12-Apr-03 16:46

12-Apr-03 16:46

Hi,

I tried right clicking on the class name in Class View and choosing Add Member Function to add an operator= function to my class, but it won't add it to the .h file like it does with other functions. Is this a known bug? Is there a fix?

not getting messages

cgreathouse12-Apr-03 14:50

cgreathouse

12-Apr-03 14:50

I'm trying to add a context menu to a tray icon that appears when a user right clicks on it. I'm not getting any of the "click" messages in the window that is passed in NOTIFYICONDATA. I did notice one thing. I was using SPY++ to see if the parent window existed (it's a 0,0,0,0 invisible window). I right clicked on the window and then clicked properties. As soon as I did the window started receiving messages like crazy.

Does anyone know what's going on and what I need to do to fix it?

Here's some code snippets

CTrayWindow trayWindow;  // CTrayWindow derives publicly from CWnd<br />
trayWindow.CreateEx(0, AfxRegisterWndClass(NULL), "Tray Window", WS_POPUP, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, 0); <br />
...<br />
m_iconData.hWnd = trayWindow.GetSafeHwnd(); // m_iconData is a NOTIFYICONDATA<br />
m_iconData.uID = WM_MYMESSAGE;<br />
m_iconData.uCallbackMessage = WM_MYMESSAGE;<br />
m_iconData.uFlags = NIF_ICON | NIF_MESSAGE;<br />
Shell_NotifyIcon(NIM_ADD, &m_iconData);

CTrayWindow is instantiated in my CWinApp::InitInstance()

Thanks!

Re: not getting messages

Miszou14-Apr-03 6:48

Miszou

14-Apr-03 6:48

I remember hearing something about setting the foreground window and posting NULL messages when you are finished with the menu...

something like this:

pWnd->SetForegroundWindow();
pMenu->TrackPoupMenu(
    TPM_LEFTALIGN | TPM_LEFTBUTTON | TPM_NONOTIFY | TPM_RETURNCMD,
    point.x, point.y, pWnd, NULL );
pWnd->PostMessage( WM_NULL );

Hope this helps, or points you in the right direction somehow...

There are 10 kinds of people - those that get binary and those that don't.

Sending a CString to an edit control?

stf12-Apr-03 13:43

stf

12-Apr-03 13:43

I'm storing a large list in a CString that needs to be written to an edit control, unfortunately Message()'s fourth parameter doesn't take a CString (for when sending a WM_SETTEXT message to the edit control). So I know that I need to convert it to something else, I've tried:

TCHAR sz[1024] ;
lstrcpy(sz, sList) ;
SendMessage (hwndEdit, WM_SETTEXT, 0, (LPARAM) sz) ;

Which works when the size of sList is under 1024 but of course crashes if larger. So basically I guess I need to know how to dynamically allocate sz to the size of sList, or if there is a better way of doing this?

Thanks,
stf

Re: Sending a CString to an edit control?

Ravi Bhavnani12-Apr-03 14:03

Ravi Bhavnani

12-Apr-03 14:03

Since you're using, you can simply do:

editCtrl.SetWindowText (strText));

If you want to use SendMessage(), you can do:

SendMessage (hwndEdit, WM_SETTEXT, 0, strText.GetBuffer(0));
strText.ReleaseBuffer();

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: Sending a CString to an edit control?

stf12-Apr-03 16:10

stf

12-Apr-03 16:10

Worked great, thanks!

dynamic memory allocation

SHaroz12-Apr-03 12:57

SHaroz

12-Apr-03 12:57

If I have a class called MyClass and three variables (var1, var2, var3), how do a create a multidimensional array of MyClass with dimensions the size of the variables. Here is an example:

class MyClass
{
   int blablabla;
   //some stuff
};
    
int main()
{
   int i = 2;
   int var1 = ++i; // 2
   int var2 = ++i; // 3
   int var3 = ++i; // 4
   MyClass ***table;
   
   table = new table[var1][var2][var3]; //I get an error here
   //VS says only the first dimension can be non-constant
   
   ...
}

I've gotten so used to C# that I forgot how to do easy things like this. Eek! | :eek:

I would greatly appreciate any help.

Thanks,
Steve

Re: dynamic memory allocation

Dominik Reichl13-Apr-03 1:12

Dominik Reichl

13-Apr-03 1:12

Unfortunately allocating multidimensional arrays in C++ is not that easy as in your example Wink | ;)

See these articles:

http://www.geocities.com/SPUR4444/prog/multidimensional.html[^]

http://cpptips.hyperformix.com/cpptips/alloc_multi_dim[^]

SHaroz wrote:
int i = 2;
int var1 = ++i; // 2
int var2 = ++i; // 3
int var3 = ++i; // 4
MyClass ***table;

The comments are wrong. You are using ++ before the variable what means that the variable is incremented before it is used.

So these comments would be correct:

int i = 2;
int var1 = ++i; // 3
int var2 = ++i; // 4
int var3 = ++i; // 5
MyClass ***table;

-Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??

Re: dynamic memory allocation

SHaroz13-Apr-03 7:56

SHaroz

13-Apr-03 7:56

Thanks Diminik Smile | :)

Good job catching the error in my comments. I was just trying to make up a quick example of my question.

Loading partial bitmap

georgiek5012-Apr-03 11:02

georgiek50

12-Apr-03 11:02

How would I go about (Win32) getting a handle to part of a bitmap, say the first 100 x 100 pixels?

UNICODE build - but something's linking incorrectly

Mark Otway12-Apr-03 10:52

Mark Otway

12-Apr-03 10:52

Hi,

Got a bit of a perplexing problem. I'm building a Unicode DLL, which is linking to a lib I've built (also Unicode, obviously). If I build the DLL without referencing the lib, it builds perfectly. However, when I link in the lib, something in it is causing the non-Unicode MFC libraries (nafxcwd) to be linked in too, causing the error:

LINK : warning LNK4098: defaultlib 'nafxcwd.lib' conflicts with use of other libs; use /NODEFAULTLIB:library

However, both DLL and lib are compiled with _UNICODE defined, and the lib's compiled with /NODEFAULTLIB, so I can't work out where the reference to the non-Unicode symbol is coming from. I've tried linking with /VERBOSE:LIB, but it doesn't seem to be giving any clues.

The question is, how can I find out what symbol is causing the linker to search in the nafxcwd library? Is there any linker option which will show me which symbol is being searched for when each library is being searched? Any other easy ways of solving this?

Thanks

Mark

how to return HRESULT function in MFC ActiveX

Obi-Wan-Kenobi12-Apr-03 10:06

Obi-Wan-Kenobi

12-Apr-03 10:06

Hi guys,

My MFC based activeX control exposes a method which is suppose to return a HRESULT.
how can this be implemented, When I try to add a method to my control I do not have the option of
selecting HRESULT as a return type.

Does OLE have its own version of HRESULT ?
Unsure | :~

Use defined message

Member 25731512-Apr-03 4:02

Member 257315

12-Apr-03 4:02

I create modeless dialog. In this dialog I create a "APPLY"
button. I define a use defined message" WM_APPLY".
I want the "WM_APPLY" message sent to Doc or View class.
but acually it sends it to Mainframe,the MainFrame use
OnCmdMsg to send it Doc or View. How Can I directly
send "WM_APPLY" to View or Doc class not through MainFrame's
OnCmdmsg.
Your Answer will be appreciated very much.

wuwenguo

Re: Use defined message

valikac12-Apr-03 5:55

valikac

12-Apr-03 5:55

What class creates the modeless dialog box? For example, if it is created in a view class, then one solution is GetParent() and GetSafeHandle(). Otherwise, you should send a message to main frame.

Kuphryn

What are Crystal Reports??

IrishSonic12-Apr-03 3:58

IrishSonic

12-Apr-03 3:58

What are Crystal Reports and what are they used for??

Where can I found out info on creating them??

Thanks,
grahamoj.

Re: What are Crystal Reports??

Michael P Butler12-Apr-03 4:02

Michael P Butler

12-Apr-03 4:02

http://www.crystaldecisions.com/products/crystalreports/appdev/default.asp[^]

Michael

'War is at best barbarism...Its glory is all moonshine. It is only those who have neither fired a shot nor heard the shrieks and groans of the wounded who cry aloud for blood, more vengeance, more desolation. War is hell.' - General William Sherman, 1879

2 quick questions about ShellExecuteEx() and CreateProcess()..

IrishSonic12-Apr-03 3:56

IrishSonic

12-Apr-03 3:56

This is something I noticed about using ShellExecute() and CreateProcess(). When I have this:

cout << "Start..";

ShellExecuteEx(/* I call notepad or something here!! */);

cout << "End..";

It calls the ShellExecuteEx function first and THEN the FIRST cout statement and then the SECOND cout statement i.e

(displays the notepad.exe)
Start..
End..

How do I get it to call the first cout statement, then the ShellExecuteEx() and then the second cout statement??

Also how do I get the notepad.exe to exit when I am finished doing what I do with it, in the program??

Thanks,
grahamoj.

Re: 2 quick questions about ShellExecuteEx() and CreateProcess()..

valikac12-Apr-03 5:56

valikac

12-Apr-03 5:56

Interesting. Set a delay timer right after "Start.." and see if the console displays it. Maybe it displays it so quick that you miss it.

Kuphryn

Re: 2 quick questions about ShellExecuteEx() and CreateProcess()..

Michael Dunn12-Apr-03 6:25

Michael Dunn

12-Apr-03 6:25

Flush the output stream after each line, by adding endl:

cout << "start" << endl;
ShellExecute(...);
cout << "end" << endl;

--Mike--
THERE IS NO THERE IS NO BUT THERE IS MAGIC PIXIE DUST BUSINESS GENIE CODE PROJECT

Homepage | RightClick-Encrypt | 1ClickPicGrabber
"You have Erica on the brain" - Jon Sagara to me

Thanks, worked fine..

IrishSonic12-Apr-03 6:52

IrishSonic

12-Apr-03 6:52

Thanks, that worked..

grahamoj.

dialog's CreateEx

Member 25731512-Apr-03 3:38

Member 257315

12-Apr-03 3:38

I want to create a modeless dialog from Mainframe.
I use the following statement,I don't want to use Create
Method,I prefer to use CreateEx,because I want it to be positioned anywhere on the screen. but it fails
Please tell me the reason.

m_pDlg->CreateEx(WS_EX_CLIENTEDGE,_T("ModelessDialog"),NULL, WS_POPUP|WS_VISIBLE,rect,this,
IDD_MODELESS_DIALOG);

wuwenguo

Re: dialog's CreateEx

C^hris L^osinger13-Apr-03 10:44

C^hris L^osinger

13-Apr-03 10:44

try it without the _T("modelessdialog") (use NULL)

-c

Image tools: ThumbNailer, Bobber, TIFFAssembler

dialog-based windows programing

karanba12-Apr-03 3:37

karanba

12-Apr-03 3:37

Hi, again me
I need to learn how to make a simple dialog based window application in C++. I do not want to use MFC or any wizard. As I know I need to open I win32 empty project and add a source file. Then write WinMain function and do not create a window but call DialogBox function but how to get messages and how to destroy when close dialog. Ok
if you know any tutorial or any sample project please sent me. Blush | :O

karanba

Re: dialog-based windows programing

Toni7813-Apr-03 15:39

Toni78

13-Apr-03 15:39

This website helped me a lot when I started to learn Windows API.
http://www.winprog.org/tutorial/
I hope you find it as helpfull as I did.

// Afterall I realized that even my comment lines have bugs

First screensaver

karanba12-Apr-03 3:28

karanba

12-Apr-03 3:28

Hi, Everbody.

I am trying to do a simple screensaver by using scrnsave.lib. I am coding in VC++ 7.0 but not managed C++ or C#.
I only want to show a text in the window. Do you have any sample project.
Wink | ;)

karanba

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