Re: custom control crashes dialog - C / C++ / MFC Discussion Boards

Johan Rosengren28-Jul-04 9:10

28-Jul-04 9:10

You can't convert a DLL to a static lib without the source code. Most likely, you've succeeded in creating an import lib for the DLL. MSJET32.DLL sounds like a MS ODBC-DLL, there's no chance you'll ever be able to link it statically to your app Smile | :)

LPWSTR substring?

ting66827-Jul-04 22:39

ting668

27-Jul-04 22:39

HI~

How to search a substring from LPWSTR?
Also I cannot extract a character like string class

e.g
I cannot do this:

LPWSTR a_string = _T("abcdef")
if (a_string[2] == 'c'){...}

How to extract a character is the string is LPWSTR type?

Thanks

Re: LPWSTR substring?

Dimitris Vasiliadis28-Jul-04 3:17

Dimitris Vasiliadis

28-Jul-04 3:17

LPWSTR a_string = _T("abcdef");
if (a_string[2] == (WCHAR)'c'){...}

...Plug & Pray... Dead | X|

Re: LPWSTR substring?

Michael Dunn28-Jul-04 10:10

Michael Dunn

28-Jul-04 10:10

Dimitris Vassiliades wrote:
(WCHAR)'c'

Actually the correct syntax is L'c' for wide-char literals. (Your code will work but I didn't want the original poster to get the idea that casts are the solution for string-related stuff.)

--Mike--
Personal stuff:: Ericahist | Homepage
Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt
CP stuff:: CP SearchBar v2.0.2 | C++ Forum FAQ
----
Actual sign at the laundromat I go to: "No tinting or dying."

Re: LPWSTR substring?

Archer28211-Sep-04 6:29

Archer282

11-Sep-04 6:29

LPCTSTR SubString( LPCTSTR lpExpression, // [in] Pointer to a string to extract the substring from
ULONG nStart, // [in] Starting point
LONG nLength = -1 ) // [in] how far to go from the startig point, use -1 to go the end of lpExpression
{

if( nLength < 0 )
nLength = strlen(lpExpression) - nStart;

ULONG nPos = 0;
PTCHAR lpResult = new TCHAR[512];

for( ULONG i = nStart; i < (ULONG)(nStart+nLength); i++ )
{
// put the current char from lpExpression into lpResult
lpResult[nPos++] = lpExpression[i];
}

// add the null byte to lpResult;
lpResult[nPos] = '\0';

// return the substring
return lpResult;

}

wt abut Bar code reader

Anonymous27-Jul-04 22:28

Anonymous

27-Jul-04 22:28

Hi,

i m recving data from bar code reader ,, on Socket

In which format a bar code reader send data ..

i m not properly formating it.

2 .... as to format integer
CString s;
int value
DWORD dval
s.Foramt( "%d" , value);
wt i will use for DWORD in place of "%d" in format

thanx

custom control crashes dialog

Bilge Kaan27-Jul-04 21:49

Bilge Kaan

27-Jul-04 21:49

INT_PTR nResponse = dlg.DoModal();

return -1 if when i add a custom control using resource editor.
how can i solve this?

Re: custom control crashes dialog

Tomasz Sowinski28-Jul-04 1:14

Tomasz Sowinski

28-Jul-04 1:14

Probably the window class for custom control is not registered before DoModal call. Are you trying to call RegisterClass in OnInitDialog?

Tomasz Sowinski -- http://www.shooltz.com

Alika masiaka!

Able to add records with ADO but, cant get them display in dialog

dizzyh27-Jul-04 20:37

dizzyh

27-Jul-04 20:37

Hi all

I have a little problem. I am using ADO to connect to a database, I have managed to add records to this db, but when I want them displayed the recordset is empty, what am i doing wrong?
Is it possibly because access 2000 has limitations on the amount of fields you can view?, Is it because ADO has limitations on the record set?, I have even copied working code from another program and still the record set is blank!

Here is the code:

<br />
void CViewRptDlg::OnShowReport()<br />
{m_strConnection = _T("DSN=Report_prg");<br />
m_strCmdText = _T("Select * From R_tbl where MonthName='"+CString(m_strMonth)+"' and WardNumber='"+CString(m_strWard)+"'");<br />
	m_pConnection = NULL;<br />
	m_pCommand = NULL;<br />
	m_pRs = NULL;<br />
	m_piADORecordBinding = NULL;<br />
	::CoInitialize(NULL);<br />
<br />
	try<br />
	{<br />
<br />
		m_pConnection.CreateInstance(__uuidof(Connection));<br />
		m_pCommand.CreateInstance(__uuidof(Command));<br />
		m_pRs.CreateInstance(__uuidof(Recordset));<br />
		m_pRs->Open(LPCTSTR(m_strCmdText),LPCTSTR(m_strConnection),adOpenDynamic,adLockOptimistic,adCmdUnknown);<br />
if(FAILED(m_pRs->QueryInterface(__uuidof(IADORecordBinding),(LPVOID*)&m_piADORecordBinding)))<br />
				_com_issue_error(E_NOINTERFACE);<br />
				m_piADORecordBinding->BindToRecordset(&m_rsRecSet);<br />
				RefreshBoundData();	<br />
	}<br />
	catch(_com_error &e)<br />
	{<br />
		GenerateError(e.Error(),e.Description());<br />
	}<br />
<br />
void CViewRptDlg::RefreshBoundData()<br />
{<br />
	CCustomRs *pRs = GetRecSet();<br />
		<br />
		///////////////// Report ID ////////////////////////////////////<br />
		if(adFldOK == pRs->lReportIDStatus)<br />
			m_nReportID = pRs->m_nReportID;<br />
		else<br />
			m_nReportID = 0;<br />
		/////////////////////////////////////////////////////////////////<br />
		/////////////////// Month Name //////////////////////////////////<br />
		if(adFldOK == pRs->lMonthNameStatus)<br />
			m_strMonth = pRs->m_szMonthName;<br />
		else<br />
			m_strMonth = _T("");<br />
		/////////////////////////////////////////////////////////////////<br />
		////////////////// Ward Number //////////////////////////////////<br />
		if(adFldOK == pRs->lWardNumberStatus)<br />
			m_strWard = pRs->m_szWardNumber;<br />
		else<br />
			m_strWard = _T("");<br />
		////////////////////////////////////////////////////////////////<br />
UpdateData(0);<br />
}<br />

problem with Edit Box

Anonymous27-Jul-04 20:05

Anonymous

27-Jul-04 20:05

i want to limit the entry size in the edit-box. How do i do? secondly, I want to enter only numbers and special characters into my edit, no characters. how do i change it?

Re: problem with Edit Box

Manfred Staiger27-Jul-04 23:04

Manfred Staiger

27-Jul-04 23:04

You can do this by subclassing your Edit-box. Read this article:

http://www.codeproject.com/miscctrl/subclassdemo.asp[^]

MS

Re: problem with Edit Box

basementman28-Jul-04 10:46

basementman

28-Jul-04 10:46

See the EM_LIMITTEXT message.

onwards and upwards...

Owner drawn windows

Archer28227-Jul-04 19:32

Archer282

27-Jul-04 19:32

Can anyone point me to an example of an MFC owner drawn window? (That does NOT use a remake of CDialog class)

Free Lib to create PDF documents?

Erik27-Jul-04 18:57

Erik

27-Jul-04 18:57

Hi,

I just want to add a cool feature to my application: creation of pdf documents from data in a listview control. However, pdf is a binary format, and therefor not as straightforward to create as for example html.

Does anybody know of a free (maybe open-source?) library that works under Visual C++, to create simple pdf files?

Thank you,

Erik

Re: Free Lib to create PDF documents?

francisquet27-Jul-04 21:58

francisquet

27-Jul-04 21:58

I think PDFlib Lite is free for personal use.

Visit www.pdflib.com and look for PDFlib lite.

Regards

Button to List

arunforce27-Jul-04 15:32

arunforce

27-Jul-04 15:32

Well, I am a newbie programmer.

I need help with a lil project I am making.
Lets say I have this button called increase, when I press this button I want it to add 1 to the variable x, and display the changes.

So under the button "OnIncrease",
I chose and put the command

x++;

Which lets me add 1 to the variable x which is an unsigned long. Once this button is clicked, I want to also make it display in the box called "OnList"
which is a list box.

Can anyone explain simply how to make it say, "You have "x" dollars in your account."

Thanks,
make sure it is simple for me to understand.

Arun

Re: Button to List

V.27-Jul-04 23:42

27-Jul-04 23:42

CString str;
CString output;
str.Format("%i", x);//make a string from your number
output = "You have \"" + str + "\"dollars in your account.";//make nice ans fluffy string. (\" is a " character in your string)

listbox.Add(output);//add to listbox (could be AddString or something don't know by heart)

hope this helps.

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

Re: Button to List

arunforce28-Jul-04 4:19

arunforce

28-Jul-04 4:19

I tried implementing your code and I got errors.

Do you think you can manually explain it?
What did you mean make nice ans fluffy string?

I get these errors -_-
F:\Documents and Settings\Administrator\My Documents\Arun\Code\Tycoon\TycoonDlg.cpp(107) : error C2065: 'listbox' : undeclared identifier
F:\Documents and Settings\Administrator\My Documents\Arun\Code\Tycoon\TycoonDlg.cpp(107) : error C2228: left of '.Add' must have class/struct/union type
F:\Documents and Settings\Administrator\My Documents\Arun\Code\Tycoon\TycoonDlg.cpp(107) : error C2065: 'output' : undeclared identifier

This is the code from my file.

void CTycoonDlg::OnIncrease()
{
cash++;
//On Click, Display in ListBox "You currently have $(cash) with you."
CString str;
CString output;
str.Format("%i", cash);//make a string from your number
output = "You have \"" + str + "\"dollars in your account.";//make nice ans fluffy string. (\" is a " character in your string)
}

void CTycoonDlg::OnList()
{
listbox.Add(output);//add to listbox (could be AddString or something don't know by heart)
}

I know I said "x" would be the variable, but I decided it was too confusing and changed it to "cash".

Re: Button to List

V.28-Jul-04 5:18

28-Jul-04 5:18

arunforce wrote:
What did you mean make nice ans fluffy string?

Nothing actually, crazy developers like myself often set crazy comment to try and be funny.

ok, CString output is declared LOCAL in your case. Put it in your .h file or somewhere on top of your .cpp file. (but under the include part)
"listbox" is an unknown Object (or variable) in your case.
go to the resources, right click your list box and choose "add member variable". Name it and use this name instead of "listbox"

output = "You have \"" + str + "\"dollars in your account."
make it:
output = "You have " + str + " dollars in your account.";
then you don't have the " in your text.

try this and you'll get less errors.
btw: I explained it taken in account you have Visual Studio. If you don't, you have to create your listbox manually. =>( http://msdn.microsoft.com[^] search on CListBox)

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

how to Launch IE with ShellExecute?

Dody_DK27-Jul-04 14:27

Dody_DK

27-Jul-04 14:27

hey all

i know that the code is
ShellExecute(NULL, "open", "http://",NULL, NULL,SW_SHOWNORMAL);

but if i want to hide the window of the IE... is there any way?

Re: how to Launch IE with ShellExecute?

Ivan Cachicatari27-Jul-04 15:30

Ivan Cachicatari

27-Jul-04 15:30

Hi,

ShellExecute(NULL, "iexplore", "about:blank",NULL, NULL,SW_SHOWNORMAL);

Width CreateProcess() function can obtain more information about new process:

Visit this link to : Creating Processes(msdn)[^]

Ivan Cachicatari
www.latindevelopers.com

Re: how to Launch IE with ShellExecute?

Ryan Binns27-Jul-04 18:39

Ryan Binns

27-Jul-04 18:39

Try SW_HIDE rather than SW_SHOWNORMAL.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: how to Launch IE with ShellExecute?

Archer28227-Jul-04 19:26

Archer282

27-Jul-04 19:26

if you want to hide or show it later you can do so using ShowWindow();
the problem is you will have to obtain a handle ot the window

example (hide)
ShowWindow( hWnd, SW_HIDE );

example (show)
ShowWindow( hWnd, SW_SHOW );

if im guessing correctly you want to get the user to go to a web-site, without them knowing it right?

if this is true i suggest just learning how to use sockets

Nishant (i think i spelled it right) has a very good artical on using sockets

Re: how to Launch IE with ShellExecute?

Dody_DK28-Jul-04 0:30

Dody_DK

28-Jul-04 0:30

you are right archer.. i want the user get the website without knowing it...i will try to find more info about socket.. and sure i will replay here for more info.
thanks : )

Re: how to Launch IE with ShellExecute?

Ravi Bhavnani28-Jul-04 13:54

Ravi Bhavnani

28-Jul-04 13:54

Instead of running IE, you could use UrlDownloadFile() to download a file or use my WebResourceProvider[^] class to write a crawler.

/ravi

My new year's resolution: 2048 x 1536
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