Maybe an example can help? - C / C++ / MFC Discussion Boards

Re: GetScreenResolution

led mike28-Apr-09 4:31

led mike

28-Apr-09 4:31

GetSystemMetrics[^]

what's the average cpu tick counts for a CView's WM_PAINT handler?

flyingxu28-Apr-09 4:17

flyingxu

28-Apr-09 4:17

I'm going to add more code into WM_PAINT hander, but I'm afraid to add to much to recude the performace.

I need a benchmark value to test if too much cpu tick is spended. Anybody has a value to share?

I know it depends on the different situation, but,.. I still like to see a estimated value. Confused | :confused:

Re: what's the average cpu tick counts for a CView's WM_PAINT handler?

led mike28-Apr-09 4:28

led mike

28-Apr-09 4:28

Use Double Buffering[^]

How to limit size of edit box

amitovoip28-Apr-09 3:55

amitovoip

28-Apr-09 3:55

Hi guys.

I have a fix for a edit box
I have a edit box (dialog box) which take string input ..........
The input at edit has a long limit i want to have finite entries in the edit box say string with 5 chars or number with 5 digits where i set the scope of the input string

Re: How to limit size of edit box

David Crow28-Apr-09 4:34

David Crow

28-Apr-09 4:34

How about sending it a EM_LIMITTEXT message?

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

SQL & c++

komofilms7728-Apr-09 2:57

komofilms77

28-Apr-09 2:57

Hello Guys

Can anyone help me with "INSERT INTO" statement...
I need to insert variables into table(MSSQL) and my app. is in c++.

INSERT INTO TABLE_NAME (Col1,Col2,Col3)VALUES ('var1','58.5','15')

This is ok for constants but i cant made it work if i want to insert variables instead constants...

int var1;
int var2;
int var3;

INSERT INTO TABLE_NAME (Col1,Col2,Col3)VALUES (var1,var2,var3) ...?????

any ideas?
tahnks in advance, Komo

Sigh | :sigh:

Re: SQL & c++

David Crow28-Apr-09 3:06

David Crow

28-Apr-09 3:06

komofilms77 wrote:
This is ok for constants but i cant made it work if i want to insert variables instead constants...

Can't you use string, sprintf(), or CString?

Maybe an example can help?

gerens28-Apr-09 3:29

gerens

28-Apr-09 3:29

Hope, the example below can help

graph::addvalue(int nummer, CString typ, CString kstartrnummer,int zeile, int spalte, CString betrag, CString text, int r, int g, int b)
{
	CString abfrage;
	char strbetrag[100];
	CString cnummer, czeile, cspalte, cr, cg, cb;

	sprintf(strbetrag, "%i\0", nummer);
	cnummer = strbetrag;
	sprintf(strbetrag, "%i\0", zeile);
	czeile = strbetrag;
	sprintf(strbetrag, "%i\0", spalte);
	cspalte = strbetrag;
	sprintf(strbetrag, "%i\0", r);
	cr = strbetrag;
	sprintf(strbetrag, "%i\0", g);
	cg = strbetrag;
	sprintf(strbetrag, "%i\0", b);
	cb = strbetrag;
	text.Replace("'", "''");

	abfrage = "INSERT INTO Graph (Nummer, Typ, Kstartrnummer, Zeile, Spalte, Text, Betrag, r, g, b) VALUES (" ;
	abfrage = abfrage + cnummer + ", '" + typ + "', " + kstartrnummer + ", " +  czeile;
	abfrage = abfrage + ", " + cspalte + ", '" + text + "', ";
	abfrage = abfrage + betrag + ", " + cr + ", " + cg + ", " + cb +")";
	db.ExecuteSQL(abfrage);
}

Good luck, Gérard

Re: Maybe an example can help?

komofilms7728-Apr-09 19:41

komofilms77

28-Apr-09 19:41

i made it with sprintf and works great thanks guys Smile | :)

correct way to copy bstr ?

Mogaambo28-Apr-09 1:44

Mogaambo

28-Apr-09 1:44

BSTR strLoggedInUser=GetLoggedInUser();//is this line of code is correct or i use wcscpy here.

BSTR value=::SysAllocStringLen(L"",::SysStringLen(strLoggedInUser));
wcscpy(value,strLoggedInUser);
::SysFreeString(strLoggedInUser);

///////////////////////////////////////////////////////////////////////

HRESULT hr = pclsObj->Get(L"Manufacturer", 0, &vtProp, 0, 0);

BSTR strItemName =vtProp.vt==VT_NULL?L"-NA-":vtProp.bstrVal;// here too is this line of code is correct or i use wcscpy here.

“You will never be a leader unless you first learn to follow and be led.”
–Tiorio

"Coming together is a beginning, staying together is progress, and working together is success." Henry Ford

Re: correct way to copy bstr ?

_AnsHUMAN_ 28-Apr-09 1:55

_AnsHUMAN_

28-Apr-09 1:55

BSTR value=::SysAllocString(strLoggedInUser);

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Re: correct way to copy bstr ?

Garth J Lancaster28-Apr-09 1:58

Garth J Lancaster

28-Apr-09 1:58

let me suggest something for you ...

http://lmgtfy.com/?q=copy+bstr[^]

Re: correct way to copy bstr ?

Mogaambo28-Apr-09 2:09

Mogaambo

28-Apr-09 2:09

i know how to copy bstr, but my problem is that when i assign

BSTR b=L"hello";

some where in code the value of b changes to " some garbage value".

but if i use wcscpy, the value of b doesn't change.

please read my question and answer me.

“You will never be a leader unless you first learn to follow and be led.”
–Tiorio

"Coming together is a beginning, staying together is progress, and working together is success." Henry Ford

Re: correct way to copy bstr ?

tolw28-Apr-09 2:29

tolw

28-Apr-09 2:29

Take a look at: http://msdn.microsoft.com/en-us/library/ms221069.aspx[^]

It is clearly stated that asigning anything to a BSTR should be done using SysAllocString. So using wcscpy or a regular asignment operator (=) is wrong by definition.

You can try something like this (I assume GetLoggedInUser() returns a wchar *):

BSTR strLoggedInUser = ::SysAllocStringLen( GetLoggedInUser() );

//..do something..

//Call this when you are sure the BSTR is no longer used!!
::SysFreeString(strLoggedInUser);

Re: correct way to copy bstr ?

CPallini28-Apr-09 3:11

CPallini

28-Apr-09 3:11

Mogaambo wrote:
BSTR b=L"hello";

That is bad.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: correct way to copy bstr ?

Mogaambo28-Apr-09 3:51

Mogaambo

28-Apr-09 3:51

BSTR b=SysAllocString(L"hello");

BSTR c=b;// here wcscpy should be used or it will work

“You will never be a leader unless you first learn to follow and be led.”
–Tiorio

"Coming together is a beginning, staying together is progress, and working together is success." Henry Ford

Re: correct way to copy bstr ?

CPallini28-Apr-09 5:16

CPallini

28-Apr-09 5:16

Mogaambo wrote:
BSTR b=SysAllocString(L"hello");

The above is fine.

Mogaambo wrote:
BSTR c=b;// here wcscpy should be used or it will work

The above is bad.

Use, instead

BSTR c = SysAllocString(b);

Please read [^].
Smile | :)

Need To create a plugin for adob photoshop.

bankey101028-Apr-09 1:28

bankey1010

28-Apr-09 1:28

Hi All,

I need to create a plugin for adob photoshop. can any give me some idea from where i can get some example sorce code or can i found SDK to develop plugin with VC++.

please share your knowledge.

thanks
Bankey Khandelwal

Re: Need To create a plugin for adob photoshop.

_AnsHUMAN_ 28-Apr-09 1:50

_AnsHUMAN_

28-Apr-09 1:50

See here[^] for downloading the SDK.

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

firing a http url in c

Kiran Pinjala28-Apr-09 0:35

Kiran Pinjala

28-Apr-09 0:35

Hi,
I need to write an application in c on linux, which has to fire a http url. Can you guide me?
Is there any wrapper class like CHttpConnection(MFC) which can be used in linux.

Thank you

Saadhinchaali

Re: firing a http url in c

Rajkumar R28-Apr-09 1:26

Rajkumar R

28-Apr-09 1:26

[libcurl has HTTP support along several other protocols^] BTW, here is [linux forum^]

SetScrollInfo() not calling OnSize() of CDialog

Member 438103628-Apr-09 0:32

Member 4381036

28-Apr-09 0:32

Hai all,

In CDialog,zooming the image and scrolling works fine for dialog but not picture control(CStatic)of CDialog.
I am trying to load an image(any type) in picture control and zooming it.For that i am using the third party class where in contructor i am assigning picture control window.It displays the image and enable the scrollbar according to zoom.

Passing this->m_hWnd of CDialog inside my Zoomin()

SetScrollInfo(this->m_hWnd ,SB_HORZ,&m_HSInfo,TRUE)

This code is calling OnSize() of CDialog and diaplays image in dialog where i can access scrollbar,but if i pass my picture control window inside the

SetScrollInfo(hWndpicturecontrol,SB_HORZ,&m_HSInfo,TRUE)

it is not caling OnSize() of CDialog and i cant even access the thumb of the scrollbar.

I followed the sample by refering the below URL
http://www.codeproject.com/KB/cpp/GDI_.aspx

Thanks and regards
SatheeshKumar.

Re: SetScrollInfo() not calling OnSize() of CDialog

girishog28-Apr-09 1:04

girishog

28-Apr-09 1:04

Hi,
I dont have Idea which is 3rd party class your using but you can use CFormview or CScrollview in the Dialogbox which make the you work easier.

GG

Screeshot in wince

ujjawal kumar28-Apr-09 0:15

ujjawal kumar

28-Apr-09 0:15

Sample code(c++) to get the screen shot of the windows opened in the desktop on CE Device machine. How would the screen shot be saved as bitmap file in the device machine?
Thanks

Re: Screeshot in wince

David Crow28-Apr-09 3:09

David Crow

28-Apr-09 3:09

Would this work?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.