C / C++ / MFC Discussion Boards

san123pune2-Apr-07 20:58

2-Apr-07 20:58

Hi ,

Is BSTR support UNICODE?
I have a component method that takes BSTR as argument.
That component is build with UNICODE support.
In that method, I have written this code.

TCHAR tChar[255];
_stprintf(tChar,_T("%s"),(LPCTSTR)bstrName);
// then print

Is it correct way ?

Thanks in advance

Re: BSTR supports Unicode

Stephen Hewitt2-Apr-07 21:25

Stephen Hewitt

2-Apr-07 21:25

A BSTR is a Unicode string (but beware: a Unicode string is ***NOT*** a BSTR). No conversion like your doing may be needed.

Steve

Re: BSTR supports Unicode [modified]

bosfan2-Apr-07 21:34

bosfan

2-Apr-07 21:34

Hello,
i delete my post because is not correct!!!
Take a look at next post from Stephen Hewitt

Regards
termal

-- modified at 9:44 Tuesday 3rd April, 2007

Re: BSTR supports Unicode

Stephen Hewitt3-Apr-07 2:29

Stephen Hewitt

3-Apr-07 2:29

termal wrote:
BSTR bstr = _T("text");

This is a serious coding error. For a start a BSTR is length prefixed. This means that the length of the BSTR is stored before the pointer. Your string is not. Secondly BSTRs are always Unicode; use L"your string" not _T. Finally, in most instances, a specific allocater is assumed. Your code should look like this:

BSTR bstr = SysAllocString(L"text");

To free the string use SysFreeString.

No offence, but this is basic COM; I recommend doing some serious reading as creating software lacking these fundamentals will end in tears

Steve

Re: BSTR supports Unicode

bosfan3-Apr-07 3:38

bosfan

3-Apr-07 3:38

Hello,
thank you for explanation how to use BSTR!

with best regards!
termal

Re: BSTR supports Unicode

Stephen Hewitt3-Apr-07 4:27

Stephen Hewitt

3-Apr-07 4:27

There are classes such as ATL's CComBSTR and _bstr_t (not part of ATL) which make working with BSTRs easier and safer.

Steve

Re: BSTR supports Unicode

Tim Smith3-Apr-07 19:10

Tim Smith

3-Apr-07 19:10

I know I'm being a bit anal, but if you are going to _T and TCHAR, then you need to write you app to build in both ANSI and UNICODE. Your code gives the impression that it might build in ANSI but it in fact will not work.

To make your code work in both ansi and UNICODE

TCHAR tChar[255];
_stprintf(tChar,_T("%ls"),(LPCWSTR)bstrName);
// then print

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

How lo lunch network connection dialog

birajendu2-Apr-07 20:48

birajendu

2-Apr-07 20:48

HI,
I want to lunch the local area connection dialog of window thru my VC++ application. How can i achieve that?

Thanx in advance.....

birajendu
CyberG India
Delhi
India

Re: How lo lunch network connection dialog

deeps_cute3-Apr-07 1:27

deeps_cute

3-Apr-07 1:27

what do you mean by launch

Arise Awake Stop Not Till ur Goal is Reached.

Re: How lo lunch network connection dialog

Mark Salsbery3-Apr-07 8:36

Mark Salsbery

3-Apr-07 8:36

lunch. In these parts, that's the meal we eat mid-day.

"If you can dodge a wrench, you can dodge a ball."

editbox problem.

david bagaturia2-Apr-07 20:35

david bagaturia

2-Apr-07 20:35

hi all.

I have dialog and Editbox on it.
Now I wont to retrive text from Edit box and I use

<br />
wchar_t ch[255]=L"\0"; <br />
CString ErrorStr("ERROR!!!"); 	<br />
	<br />
m_Edit.GetLine(0,ch); // Editbox<br />
<br />
	if((ch[0] != '.')&&(ch[0] != '*')) <br />
	{<br />
		<br />
		MessageBox(ErrorStr);<br />
		<br />
                return;<br />
	}<br />

but I get diferent type simbols,

Can help?

Re: editbox problem.

vimarsh puneet2-Apr-07 21:00

vimarsh puneet

2-Apr-07 21:00

just make a control variable of the edit box and use getwindowtext or u can create a cstring variable and use updatedate(trure) and the cstring variable will have the data

Re: editbox problem.

david bagaturia2-Apr-07 21:40

david bagaturia

2-Apr-07 21:40

Thanks.

Re: editbox problem.

Naveen2-Apr-07 21:28

Naveen

2-Apr-07 21:28

david bagaturia wrote:
m_Edit.GetLine(0,ch); // Editbox

use

m_Edit.GetWindowText( ch, 255 );

nave

Re: editbox problem.

david bagaturia2-Apr-07 21:41

david bagaturia

2-Apr-07 21:41

Thanks.

MFC --->ODBC---->MS Access manipulation safdsd

santoshsan2-Apr-07 20:04

santoshsan

2-Apr-07 20:04

How do write WHERE clause in my SELECT query it is giving me error like "data type mismatch in expression syntax"
My Q is "SELECT subcat_id,subcat_name FROM temp_subcat WHERE cat_id = 'get_cat'"

where get_cat is long int variable and cat_id field of DB is also long Integer type.

I thing writing 'get_cat' is not sufficient and i should use some other syntax like '".get_cat."' in PHP i used to write, but again its not working and i am not sure, plz help me out with this simple problem. asfdsf

San

San

Re: MFC --->ODBC---->MS Access manipulation safdsd

rp_suman2-Apr-07 20:16

rp_suman

2-Apr-07 20:16

I am not sure, but how about trying get_cat without single quotes like:

"SELECT subcat_id,subcat_name FROM temp_subcat WHERE cat_id = get_cat"<br />

Best Regards,
Suman

Re: MFC --->ODBC---->MS Access manipulation safdsd

santoshsan2-Apr-07 21:35

santoshsan

2-Apr-07 21:35

Yes that is good approach, thanks, in fact i tried it
"SELECT subcat_id,subcat_name FROM temp_subcat WHERE cat_id = get_cat"

and the response from program changed than before but it is throwing exception now like --> "Too few parameters, Expected 1"

From this it seems SQL parser is not counting the get_cat parameter, not sure

Thanks again, but plz check if we could figure out this Exception now

San

San

Re: MFC --->ODBC---->MS Access manipulation safdsd

rp_suman5-Apr-07 16:55

rp_suman

5-Apr-07 16:55

It means your SQL statement expects single value and you are not passing the value actually to the statement. Check if there is any spelling mistake of variable name.
Please read the message in these pages:
http://www.mvps.org/access/queries/qry0013.htm[^][^]
http://support.microsoft.com/kb/209203/en-us[^][^]

If still you are not able to solve, please try posting in SQL/ADO section of forum:
http://www.codeproject.com/script/comments/forums.asp?forumid=1725[^][^] and search in Google with error message you are getting and s/w you are using (MS ACCESS/ODBC etc)
Best Regards,
Suman

MFC --->ODBC---->MS Access manipulation

santoshsan2-Apr-07 20:02

santoshsan

2-Apr-07 20:02

San

tab control-plz help me ?

prathuraj2-Apr-07 19:29

prathuraj

2-Apr-07 19:29

i want to use single dialog for all tabs in tab control.but the value of controls on dialog is vary for each tabs.how to do this.

or

How to create a dyanmic dialog with controls.

Re: tab control-plz help me ?

vimarsh puneet2-Apr-07 20:57

vimarsh puneet

2-Apr-07 20:57

u can make the visible property false where you dont require and visible true where u want that perticular control

Re: tab control-plz help me ?

prathuraj2-Apr-07 21:30

prathuraj

2-Apr-07 21:30

how to add dynamic dialog to tab control.

Re: tab control-plz help me ?

prathuraj2-Apr-07 21:32

prathuraj

2-Apr-07 21:32

now i got material for create a dynamic dialog.In that material dynamic dialog is created when button is clicked.i want to do this with tab .how to do this.

please help

vimarsh puneet2-Apr-07 19:14

vimarsh puneet

2-Apr-07 19:14

http://www.codeproject.com/buttonctrl/cxskinbutton.asp

in this code how can one call the button clicked function on pressing enter

vimarsh

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