Re: weird errors - C / C++ / MFC Discussion Boards

Cedric Moonen15-Jun-05 3:24

15-Jun-05 3:24

Use DependcyWalker. This tool is included with Visual Studio. It will show you all the dll's required by your application to run.

Re: Building question

normanS15-Jun-05 3:53

normanS

15-Jun-05 3:53

Have a look at "static linking" in Visual Studio.
If you static link then the necessary functions are included in your EXE (This also makes the EXE much bigger, but EXE size is good to impress unknowledgeable customers!)

Re: Building question

Lampros Giampouras15-Jun-05 14:09

Lampros Giampouras

15-Jun-05 14:09

No luck. I put it in: use mfc as a static library, and errors were created..

I can't seem to find a way to see what dlls are called..
I must be doing something wrong and I don't have DependcyWalker. How do they do it?..

Re: Building question

squidev15-Jun-05 15:46

squidev

15-Jun-05 15:46

Are you sure you don't have DependencyWalker ?

Look for a file called depends.exe, under
[Path to Visual Studio]\Common\Tools

Hope this helps

Re: Building question

Lampros Giampouras16-Jun-05 9:11

Lampros Giampouras

16-Jun-05 9:11

That helped, thanks!
I found it. Now what remains is to send the prorgam to someone ans see if it works Smile | :)

weird errors

Anonymous15-Jun-05 2:29

Anonymous

15-Jun-05 2:29

Hi everyone, forgive me if my errors will seem trivial to you, I've only recently starting working with Windows programming and MFC (although I've had plenty of experience programming in console), and my program doesn't seem to work as expected.

First of all, let me explain what it should do and how it's set up. Basically, I have a dialog box with 5 edit boxes and 1 "ok" button on it. I'm trying to get the dialog boxes to work like the ones for the registration key with one little extra feature. The caret should jump to the next box after 5 characters are put into one box, and also if the user uses copy/paste command, the pasted text gets split into the boxes. Well, I wrote the program that should do all this, but there are some things that happen that should not happen and I have no clue why. Basically I have the first 4 boxes carry identical code:

<br />
void Dlg2::OnChangeEdit1() <br />
{<br />
	// TODO: If this is a RICHEDIT control, the control will not<br />
	// send this notification unless you override the CDialog::OnInitDialog()<br />
	// function and call CRichEditCtrl().SetEventMask()<br />
	// with the ENM_CHANGE flag ORed into the mask.<br />
	<br />
	// TODO: Add your control notification handler code here<br />
	CWnd* m_wEdit1=GetDlgItem(IDC_EDIT1);<br />
	m_wEdit1->GetWindowText(key1);<br />
	temp=key1.GetLength();<br />
	if (temp>4)<br />
	{<br />
		temp-=5;<br />
		CWnd* m_wEdit2=GetDlgItem(IDC_EDIT2);<br />
		m_wEdit2->SetWindowText ( _T(key1.Right(temp))); //has to be done before next command, otherwise we change the text in left window beofre right window<br />
		m_wEdit1->GetWindowText(key1);<br />
		if(temp>0) m_wEdit1->SetWindowText ( _T(key1.Left(5)));<br />
		m_wEdit2->SetFocus();<br />
	}<br />
}<br />

and the fifth box just limits the maximum text to 5. The above code works fine for typing the key in manually, the cursor switches to next window after 5 characters are typed in. However, copy/pasting the code in doesn't work like I expected it to. Instead, the first box gets all of the pasted text, the 2nd gets all but the first 5 characters, and so on. So for example if I type in "abcdefghijklmno", the first box will have "abcdefghijklmno", 2nd will have "fghijklmno" and 3rd "klmno".

Now here is what's even weirder. If I take the exact same code from above, change the "if (temp>4)" statement to "if (temp>5)" and remove the "if (temp>0)" part from the "if (temp>0) m_wEdit1->SetWindowText(_T(key1.Left(5)));" then the copy/pasting works like it should with each box only receiving 5 characters, but when the text is put in manually the cursor goes right before the last character when it is moved to the new box. This makes sense, since I never ordered the caret to move, but as I will explain in a moment even ordering it to move won't do anything. Another thing is, if I leave the "if (temp>4)" message alone, and just remove the "if (temp>0)" part, the program crashes when it processes the 5th character. This I don't udnerstand either, the if is in front of the statement that selects the 5 characters to be put into the first box. Therefore it's guaranteed that when the user puts in 5 characters there should be enough characters for the first box, yet it always crashes after 5th character is put in (or when the message is pasted into it that's longer than 5 characters). I'm very confused by this error as well.

Last, but not least, the caret isn't moving. If I add the code below to the code above after the last line (SetFocus one) then it gives the same result as if there is no code at all:

<br />
		CPoint myPoint = m_wEdit2->GetCaretPos();<br />
		CDC* pDC = m_wEdit2->GetDC();<br />
		myPoint.x += (pDC->GetTextExtent (_T(key1.Right(temp)), temp)).cx;<br />
		SetCaretPos (myPoint);<br />

And I don't understand why this doesn't work either. Basically all I'm doing is taking the current caret position, figuring out the physical length of the text, and offsetting the caret. But it doesn't get offset. I even tried creating a new function "OnSetFocusEdit2" so that it gets called as soon as focus is set to second edit box, which box 1 does when it finishes and copying the caret code there instead, but still no effect. If anyone can explain to me these weird happenings, I would appreciate it.

Re: weird errors

Blake Miller15-Jun-05 4:44

Blake Miller

15-Jun-05 4:44

At least for setting the caret position, you can 'select' text in the edit field, just have the start and end at same position. It will position caret in the edit field at that character position, but none of the text will be selected.

For example:
m_wEdit2->SetSel(4,4);

Re: weird errors

David Crow15-Jun-05 5:40

David Crow

15-Jun-05 5:40

Using the Office XP Professional installation as a guide, I put this together (extraneous code has been removed):

class CMyDlg : public CDialog
{
    CButton m_btnOK;
    CEdit   m_ebKey5;
    CEdit   m_ebKey4;
    CEdit   m_ebKey3;
    CEdit   m_ebKey2;
    CEdit   m_ebKey1;
	
    afx_msg void OnChangeEdit1();
    afx_msg void OnChangeEdit2();
    afx_msg void OnChangeEdit3();
    afx_msg void OnChangeEdit4();
    afx_msg void OnChangeEdit5();
 
    void EnableOKButton( void );
};
 
void CMyDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialog::DoDataExchange(pDX);
    //{{AFX_DATA_MAP(CMyDlg)
    DDX_Control(pDX, IDOK, m_btnOK);
    DDX_Control(pDX, IDC_EDIT5, m_ebKey5);
    DDX_Control(pDX, IDC_EDIT4, m_ebKey4);
    DDX_Control(pDX, IDC_EDIT3, m_ebKey3);
    DDX_Control(pDX, IDC_EDIT2, m_ebKey2);
    DDX_Control(pDX, IDC_EDIT1, m_ebKey1);
    //}}AFX_DATA_MAP
}
 
BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
    //{{AFX_MSG_MAP(CMyDlg)
    ON_EN_CHANGE(IDC_EDIT1, OnChangeEdit1)
    ON_EN_CHANGE(IDC_EDIT2, OnChangeEdit2)
    ON_EN_CHANGE(IDC_EDIT3, OnChangeEdit3)
    ON_EN_CHANGE(IDC_EDIT4, OnChangeEdit4)
    ON_EN_CHANGE(IDC_EDIT5, OnChangeEdit5)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()
 
BOOL CMyDlg::OnInitDialog()
{
    CDialog::OnInitDialog();
 
    m_ebKey1.SetLimitText(5);
    m_ebKey2.SetLimitText(5);
    m_ebKey3.SetLimitText(5);
    m_ebKey4.SetLimitText(5);
    m_ebKey5.SetLimitText(5);
 
    return TRUE;  // return TRUE  unless you set the focus to a control
}
 
void CMyDlg::OnChangeEdit1() 
{
    if (m_ebKey1.GetWindowTextLength() == 5)
        m_ebKey2.SetFocus();
 
    EnableOKButton();
}
...
void CMyDlg::OnChangeEdit4() 
{	
    if (m_ebKey4.GetWindowTextLength() == 5)
        m_ebKey5.SetFocus();
 
    EnableOKButton();
}
 
void CMyDlg::OnChangeEdit5() 
{
    // no SetFocus() required
 
    EnableOKButton();
}
 
void CMyDlg::EnableOKButton( void )
{
    bool    bEnable = true;
 
    bEnable &= (m_ebKey1.GetWindowTextLength() == 5);
    bEnable &= (m_ebKey2.GetWindowTextLength() == 5);
    bEnable &= (m_ebKey3.GetWindowTextLength() == 5);
    bEnable &= (m_ebKey4.GetWindowTextLength() == 5);
    bEnable &= (m_ebKey5.GetWindowTextLength() == 5);
 
    m_btnOK.EnableWindow(bEnable);
}

I did not do anything for the copy/paste requirement.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

CListCtrl Class Help!

mahanagarjuna15-Jun-05 2:12

mahanagarjuna

15-Jun-05 2:12

I want to do Owner draw in ClistCtrl.
When ever a new Item is inserted to the report view of CListCtrl, the total list is getting painted.
Is there any way that I can only paint the new item to the Report View. Cry | :((

Nagarjuna

Message for ListView

Duy Nghia15-Jun-05 1:27

Duy Nghia

15-Jun-05 1:27

Hi everyone!
I don't know how to process the message when you use arrow key to move to next item in ListView like LBN_SELCHANGE in ListBox.
Please help me!
Thanks

Love

Re: Message for ListView

David Crow15-Jun-05 4:53

David Crow

15-Jun-05 4:53

You'll need to handle the LVN_xxx notifications.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Message for ListView

Duy Nghia15-Jun-05 15:35

Duy Nghia

15-Jun-05 15:35

i know that, but there is no message for the event I told. The message NM_CLICK to handle click event. If we user arrow key to select another item, there is no message

Love

Re: Message for ListView

David Crow16-Jun-05 2:47

David Crow

16-Jun-05 2:47

Duy Nghia wrote:
...but there is no message for the event I told.

Sure there is. It's LVN_ITEMCHANGED.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Creating Multiple Document Interface using a CRichEditCtrl

dittygrail15-Jun-05 1:17

dittygrail

15-Jun-05 1:17

My Application needs a MDI and the multiple documents.But want to provide
the same fuctionality with Tab control(on New should open
a add page and create the RichEditCtrl window.) on Edit the i need
multiple CRichEditCtrl should exist with its content in all the pages.
Please suggest some mechanism.

DG

Owner Draw List Box & GetText()

Jon Hulatt15-Jun-05 1:14

Jon Hulatt

15-Jun-05 1:14

Hi All,

Does anyone know why GetText() gives a string of random garbage when called on my owner draw list box class?

If I clear the owner draw style, it behaves perfectly, but when it's set I get purely random values.

Cheers

jon

using System.Beer;

Re: Owner Draw List Box & GetText()

Terence Russell1-Jun-23 8:19

Terence Russell

1-Jun-23 8:19

You probably already discovered what the issue is back in 2005. However, googling for the same issue in 2023 brought me here.

For anyone else having the problem, you need to also set the LBS_HASSTRINGS state for the ownerdrawn listbox.

Time In Microseconds

sweep12315-Jun-05 1:08

sweep123

15-Jun-05 1:08

I need to get the time in microseconds and place it into an unsigned short and have it roll over; e.g. 0 -> FFFF -> 0 etc.

See code below:

bool okMicroTime;
static double lastTimeMicroSec = 0;
static double currentTimeMicroSec = 0;
LARGE_INTEGER  micro;
long timeMicrosec;
static unsigned short timeMicroseconds = 0;

okMicroTime = QueryPerformanceCounter (µ);
currentTimeMicroSec = micro.QuadPart; 
// Set the previous time - once only at start
if(lastTimeMicroSec == 0) 
{
	lastTimeMicroSec = currentTimeMicroSec; 
}
// Calculate the time difference 
timeMicrosec = (long)(currentTimeMicroSec - lastTimeMicroSec); 
// Rollover from 0 -> FFFF -> 0
timeMicroseconds = (unsigned short)((timeMicrosec) & (0x0000FFFF));

I cant seem to get the roll over right, any suggestions please as I can no longer see the wood from the trees.

getting the upper left pixel of HBITMAP?

ThinkingPrometheus15-Jun-05 0:30

ThinkingPrometheus

15-Jun-05 0:30

hiho@ll

i think it must be simple, but i don't know how this works and searching the documentation i can't really find functions which i could do this:
how can i get the upper left pixel of a HBITMAP?

thx@ll

Re: getting the upper left pixel of HBITMAP?

ThatsAlok15-Jun-05 0:49

ThatsAlok

15-Jun-05 0:49

First Select the HBITMAP In dc and then call GetPixel(..) with 0,0 as parameter .

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

cheers,
Alok Gupta

Re: getting the upper left pixel of HBITMAP?

ThinkingPrometheus15-Jun-05 3:38

ThinkingPrometheus

15-Jun-05 3:38

hiho

i'm using a browser helper object, which i didn't write
the first problem now, was that the compiler didn't find the definition of CDC
so i made a temporary new project, which uses MFC as a dll
i copied the stdafx.h of my helper object

now everything works but:
i get the following error:
BHO error LNK2005: _DllMain@12 already defined in bho.obj

i read this article
http://support.microsoft.com/default.aspx?scid=kb;en-us;q148652
but i'm not really sure what to do?
the problem is that it seems that some libraries are compiled before the MFC libs (i need MFC libs first)
i used the linker option: /verbose:lib
and i got MANY MANY libs used!
so how should i know the compiler order?

or is there another solution?

OR anybody knows a differen solution for getting the upper left pixel than using CDC?

thx

Re: getting the upper left pixel of HBITMAP?

Bob Stanneveld15-Jun-05 4:29

Bob Stanneveld

15-Jun-05 4:29

Hello,

There are also other solutions given in the article. Did you try those?

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Re: getting the upper left pixel of HBITMAP?

ThinkingPrometheus15-Jun-05 5:49

ThinkingPrometheus

15-Jun-05 5:49

jup
tried but didn't work

now i made it using GDI functions:
i tried the following:

HDC hdc=::GetDC(parent);
SelectObject(hdc,hbmp);
SetPixel(hdc,1,1,RGB(255,0,0))
COLORREF cf=GetPixel(hdc,1,1);

i should get 255,0,0 using GetR/G/BValue functions, not?
but i get 255,255,255

i also tried make a CWindow by myself using ::GetDesktopWindow() as parent
--> the same problem
??

if i try to make my own CWindow without a parent
(new CWindow(), Create("test",NULL))
i get an exception

what could be the problem, that i get the false RGB values?

thx@ll

Re: getting the upper left pixel of HBITMAP?

Bob Stanneveld15-Jun-05 5:54

Bob Stanneveld

15-Jun-05 5:54

There could be a lot of reasons that it doesn't work. I don't know excactly which one it is, but you could check the return values of the functions and display any error information. That often helps..

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Re: getting the upper left pixel of HBITMAP?

ThinkingPrometheus15-Jun-05 21:40

ThinkingPrometheus

15-Jun-05 21:40

seems i have to give up

i tried GetLastError and i got "not enough memory"? huh?
well i think the problem is that i don't "allocate" the window correctly, because i'm using CWindow which is just a wrapper around an existing window

i tried to use CreateWindow but then i get "Windowclass not found" error

so i think i will give up that or anybody could please post, how i can make a temporary window so i have a DC using ATL functions? (i read some articles! don't know so far) would be helpful if somebody could post a little bit of code

thx

Re: getting the upper left pixel of HBITMAP?

Bob Stanneveld15-Jun-05 21:51

Bob Stanneveld

15-Jun-05 21:51

We cannot help you very much right now, since we have little information. Maybe if you start a new thread (since this one is out of sight), with a question like: "Howto create temporary DC from a HBITMAP using ATL / Win32API?".

In addition to your question, provide the code that doens't work, clear, but brief explanation of your intentions and what you think that should happen and the information presented above. See the FAQ[^] for more information about posting guidelines.

The key to getting an answer is providing us with ample information about your problem.

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

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