C / C++ / MFC

Re: CString to DWORD ? INT ?

6-Apr-04 11:49

Very Simple Smile | :)

Convert CString to String and then to int/double(whatever)

DWORD myfunc()
{
CString strVal="5.5";
char *str;
//allocate equivalent memory for the character array.
//'+1' is the space for NULL CHARACTER str=new char[CString.GetLength()+1];
for(int i=0;i<CString.GetLength();i++)
{
str[i]=CString.GetAt(i);
}
str[i]='\0'; //NULL Terminate the string

return atol(str); //RETURN AS INT
//OR
return atof(str); //RETURN AS DOUBLE
}

I hope this solves ur problem.

^{Remember... testing & debugging are always part of programming ...so exterminate those stinking bugs}

Prakash Nadar6-Apr-04 15:31

CListCtrl - Highlighting all of the selected row

6-Apr-04 15:31

it may work but very inefficient.

MSN Messenger.
prakashnadar@msn.com

"If history isn't good, just burn it." - Sidhuism.

mmica6-Apr-04 10:59

mmica

6-Apr-04 10:59

Hi all,

I'm writing a simple dialog with a listbox in "report" mode. My problem is that in order for a user to select an item in the list, (s)he has to click on the 1st column in the list. Also, this will only highlight the first column and not the rest of the row. This is functional ofcourse but it would be nice the have the whole row highlited.

Any help would be greatly appreciated Smile | :)

Mark

Re: CListCtrl - Highlighting all of the selected row

Ravi Bhavnani6-Apr-04 11:06

Ravi Bhavnani

6-Apr-04 11:06

DWORD dwStyle = ListView_GetExtendedListViewStyle (m_myListCtrl.GetSafeHwnd());
dwStyle |= LVS_EX_FULLROWSELECT;
ListView_SetExtendedListViewStyle (m_myListCtrl.GetSafeHwnd(), dwStyle);

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com

clipped controls

pgiustinoni6-Apr-04 6:37

pgiustinoni

6-Apr-04 6:37

Need help...
How can I make a CMonthCalCtrl created at runtime (with Create(..)) not clipped by the parent window?
I need to show a CMonthCalCtrl control, and need to show it outside the bounds of a CFrameWnd, but when I create and show it in a view, this is clipped by the parent.
I tried with SetWindowPos(&wndTopMost...) but nothing..
Can anyone help me?

Thanks, Paolo

Re: clipped controls

avenger_sb256-Apr-04 7:27

6-Apr-04 7:27

There is one thing you should know before using the advanced controls like Date-time-picker in ur program.

You should Call this function when your program starts.(You have to do this in API programming, cant say for sure about MFC, just give it a try. Refer www.msdn.com[^] for detailed info)

BOOL InitCommonControlsEx(<br />
    LPINITCOMMONCONTROLSEX lpInitCtrls<br />
);

It registers specific common control classes from the common control dynamic-link library (DLL).
Parameters
lpInitCtrls
Address of an INITCOMMONCONTROLSEX structure that contains information specifying which control classes will be registered.
Return Values
Returns TRUE if successful, or FALSE otherwise

^{Remember... testing & debugging are always part of programming ...so exterminate those stinking bugs}

ShowWindow problem

reznod6-Apr-04 6:09

6-Apr-04 6:09

For some reason every time I call ShowWindow it just hangs and I never get control of my application back. This didn't happen just earlier today, I may have changed something, but I have it called in two places. I know that one of them (the first example) didn't get changed, so I know that it can't be what I changed.

Here is the code that (I have changed) calls ShowWindow:

bool BuildWindow()
{
 const LPCSTR pstrTitle = "Game";
 const LPCSTR pstrCaption = "Game";

 WNDCLASS pwdcWndSpec = 
 { 
  CS_HREDRAW | CS_VREDRAW, //Style
  WindowProc, //lpfnWndProc
  0, //cbClsExtra
  0, //cbWndExtra
  GetModuleHandle(NULL), //hInstance
  NULL, //hIcon
  NULL, //hCursor
  NULL, //hbrBackground
  NULL, //lpszMenuName
  pstrTitle //lpszClassName
 };

 if ( !RegisterClass( &pwdcWndSpec ) )
 {
  Console::WriteLine("Error: Unable to register window.");
  return false;
 }

 mhwdWndHandle = CreateWindowEx(
  WS_EX_TOPMOST, //dwExStyle
  pstrTitle, //lpClassName
  pstrCaption, //lpWindowName
  WS_POPUP, //dwStyle
  0, //x
  0, //y
 GetSystemMetrics(SM_CXSCREEN), //nWidth
 GetSystemMetrics(SM_CYSCREEN), //nHeight
  NULL, //hWndParent
  NULL, //hMenu
  pwdcWndSpec.hInstance, //hInstance
  NULL ); //lpParam

 if ( !mhwdWndHandle )
 {
  Console::WriteLine("Error: Unable to create window.");
  return false;
 }
 mhinWndInstance = pwdcWndSpec.hInstance;

 ShowWindow( mhwdWndHandle, SW_SHOWNORMAL );
 UpdateWindow( mhwdWndHandle );
 SetFocus( mhwdWndHandle );
 return true;
}

mhwdWndHandle - Global HWND
mhinWndInstance - Global hInstance

The other place I have it called is in a class I made to give better control of the console window (I have not changed):

void AdvancedConsole::SetWndState( enuWndState venuWndState )
{
 ShowWindow( mhwdWndHandle, venuWndState );
}

mhwdWndHandle - Class level HWND
enuWndState - Enumeration:

__value enum enuWndState
{
 wsHidden = SW_HIDE,
 wsMax = SW_SHOWMAXIMIZED,
 wsMin = SW_SHOWMINIMIZED,
 wsNormal = SW_SHOWNORMAL
};

Any help would be greatly appreciated.

Prakash Nadar6-Apr-04 7:02

6-Apr-04 7:02

Just out of curiousity are you doing anything in OnPaint event that would hang for certain inputs?

MSN Messenger.
prakashnadar@msn.com

"If history isn't good, just burn it." - Sidhuism.

reznod6-Apr-04 7:35

6-Apr-04 7:35

I am not doing anything with on paint. This is my window's call back function though:

LRESULT CALLBACK WindowProc( HWND vhwdWndHandle, UINT vuntMsg, WPARAM vwprParam, LPARAM vlprParam )
{
	Console::WriteLine("Handle message: {0}", Convert::ToString(vuntMsg));
	switch ( vuntMsg )
	{
	case WM_KEYDOWN:
		if( vwprParam == VK_ESCAPE )
		{
            PostQuitMessage( 0 );
			return 0;
		}
		break;
	case WM_DESTROY:
		Console::WriteLine("Main window closed.");
		PostQuitMessage( 0 );
		return 0;
	}

	return DefWindowProc( vhwdWndHandle, vuntMsg, vwprParam, vlprParam );
}

I have found out that if I use a minimize action (SW_MINIMIZE, SW_SHOWMINIMIZED, or SW_SHOWMINNOACTIVE) with ShowWindow I don't have the hanging problem.

Thanks for the fast reply.

reznod6-Apr-04 7:47

6-Apr-04 7:47

By looking at what the console displays after I end the process that contains the hanging ShowWindow, I find that window is trying to process the following messages non-stop:

WM_SETCURSOR
WM_NCHITTEST

Hopefully this will be of some more help.

Prakash Nadar6-Apr-04 15:28

6-Apr-04 15:28

can you comment this line.

Console::WriteLine("Handle message: {0}", Convert::ToString(vuntMsg));

and check wheather it works or not... otherwize there seems to be no problem.

MSN Messenger.
prakashnadar@msn.com

"If history isn't good, just burn it." - Sidhuism.

reznod6-Apr-04 15:55

(Another) Debug VS Release crash - help needed!

6-Apr-04 15:55

I just added that line to see what messages were being sent. It was doing that before I put the line in. I am new to windows programming so right now I am lost as far as this problem is concerned. I am going to try and handle the messages that it keeps passing and see if that helps. If it doesn't I don't know what I'll do.

Thanks for your help none-the-less

JonCage6-Apr-04 5:22

JonCage

6-Apr-04 5:22

Okay, I've been struggling with this problem for the best part of a week now. If I don't find a solution soon, my PC's going for a flying lesson Mad | :mad:

I'm developing an MFC app, in VC++ 6.0 with the latest service patch applied, running on Windows NT. The program works fine in debug mode, but dies a horrible death in debug mode. "The instruction at "0x00918ec3" referenced memory at "0x00002301". The memory could not be "written".

Here's what I've tried so far...

1) Message boxes to try and pinpoint where the crash is occurring. After a bit of trial and error, the crash appears to occur sometime after a call in the application part of the code 'MyApp.cpp' : 'if (!ProcessShellCommand(cmdInfo))'. The crash occurs after this call is made, but before it returns. The last part of my own code that is called (as far as I can tell) is 'OnInitialUpdate' which is within the view. Now as far as I can see, it looks like the crash isn't happening in any of my code. No doubt it's somthing I've done, I just can't see where I did it!

2) Having drawn a blank with my usual method of release-mode debugging, I turned to google. I've read most of the debugging tutorials here on codeproject now and thought this might herald an answer, but the crash address doesn't appear to be relevent to either the program itself or any of the .dlls it loads (I used dependancy walker to have a look at what it uses). Their base addresses seem to be in the range 0x5F400000 (MFC42.dll) to 0x780C0000 (MSVCP60.dll) - nowhere near "0x00918ec3"!

Have I missed / mis-understood anything obvious? What should I try next?

I'd appreciate any suggestions you may have - thanks very much in advance!

Success is 99% failure

Re: (Another) Debug VS Release crash - help needed!

antlers6-Apr-04 5:59

antlers

6-Apr-04 5:59

Almost certainly you are overwriting the stack somewhere before you call ProcessShellCommand. If you can't find the mistake by inspection (get someone else's eyes on it) and you don't want to invest in something like BoundsChecker or Purify, you might try a technique I've used in similar situations: Comment out suspect code until the crash goes away, then uncomment some until the crash comes back, and use a binary search to narrow down onto your mistake.

Re: (Another) Debug VS Release crash - help needed!

Anders Molin6-Apr-04 13:30

Anders Molin

6-Apr-04 13:30

You are probably doing some wild write, that is, writing at memory you dont have allocated...
Any chance you are writing a single byte too much into a buffer somehwere?

When compiling a debug version there is left some extra space at the begining and end of buffers, so you might not notice it there.

Try some of the CRT debug functions, they are pretty good at tracking such things...

- Anders

Money talks, but all mine ever says is "Goodbye!"

ShotKeeper, my Photo Album / Organizer Application[^]

My Photos[^]

Re: (Another) Debug VS Release crash - help needed!

2249176-Apr-04 20:55

224917

6-Apr-04 20:55

do you have any commandline parameters set in ide...

greatest thing is to do wot others think you cant
suhredayan@omniquad.com

messenger :suhredayan@hotmail.com

Re: (Another) Debug VS Release crash - help needed!

JonCage6-Apr-04 22:16

JonCage

6-Apr-04 22:16

Nope, no parameters are set. I think the framework creates a new document within the call though so I guess somewhere in there, I'm doing something dodgy. I'll have another look tomorrow (if I get over this stupid tummy bug!).

Success is 99% failure

Re: (Another) Debug VS Release crash - help needed!

Paul Ranson7-Apr-04 4:08

Paul Ranson

7-Apr-04 4:08

You can do a release build with debugging information. Single stepping can be 'odd' and the debugger can get confused about variable names (sometimes they have been optimised away, for example) but being able to see the call stack etc can be invaluable.

Paul

fire button when pressing enter in and edit box

r00k136-Apr-04 5:14

r00k13

6-Apr-04 5:14

hi, i have an edit box and a button add on a tab...im trying to have it where if a user press enter in the edit box it will execute the button add (call on the add function which the button is mapped to)..how can i do this?

i've tried onchar event for that dialog and it's not detecting when i type in that edit box...

one other thing, im using microsoft commondialog activex...how can i detect if the user press CANCEL or OK

thanks alot for your help

Re: fire button when pressing enter in and edit box

Prakash Nadar6-Apr-04 7:07

Re: fire button when pressing enter in and edit box

6-Apr-04 7:07

Set the BS_DEFPUSHBUTTON style of the button.

MSN Messenger.
prakashnadar@msn.com

"If history isn't good, just burn it." - Sidhuism.

avenger_sb256-Apr-04 7:21

Re: fire button when pressing enter in and edit box

6-Apr-04 7:21

Make sure that the following propertty so not set for the edit box.

ES_WANTRETURN Specifies that a carriage return be inserted when the user presses the ENTER key while entering text into a multiple-line edit control in a dialog box. Without this style, pressing the ENTER key has the same effect as pressing the dialog box’s default pushbutton. This style has no effect on a single-line edit control

I hope it helps

^{Remember... testing & debugging are always part of programming ...so exterminate those stinking bugs}

r00k136-Apr-04 18:59

r00k13

6-Apr-04 18:59

the default button is already set on and want return for the edit box is not checked, still same problem, any other suggestions? thanks

Re: fire button when pressing enter in and edit box

avenger_sb2511-Apr-04 18:02