C / C++ / MFC

20-Apr-03 4:32

You may intercept it using the PreTranslateMessage function. Smile | :)

Regards,
BB

Re: Option for an Exit

Anonymous20-Apr-03 5:41

Anonymous

20-Apr-03 5:41

Dear Bartosz

Will you pleasee explain it in detail.I am new also to VC and i have to cutomize a product which has dlls.

I have tried WM_KEYDOWN:
if (wParam)
case:VK_F1:
ExitAppliaction();
return(0);
case: VK_ESCAPE:
ExitApplication();
return(0);
It is working for F1 key but it is not working with Escape key.

So kindly give me the explanation.

Thanking you in advance..

With Regards,

Adarsh

I

Re: Option for an Exit

Bartosz Bien20-Apr-03 6:23

Re: SQL statement parsing

20-Apr-03 6:23

Try this (SDI assumed):

BOOL CMainFreame::PreTranslateMessage(MSG* pMsg)<br />
{<br />
    if(pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_ESCAPE)<br />
    {<br />
        PostMessage(WM_QUIT);<br />
        return TRUE;<br />
    }<br />
<br />
    return CFrameWnd::PreTranslateMessage(pMsg);<br />
}

Regards,
BB

Toolbar Tooltips

DuFF19-Apr-03 14:41

DuFF

19-Apr-03 14:41

Hey,
I've made a toolbar for IE but I have one problem. I don't know how to add tooltips to my buttons. Could anyone point me in the right direction??

Thanks.

Re: Toolbar Tooltips

Michael Dunn19-Apr-03 18:00

Michael Dunn

19-Apr-03 18:00

Create the toolbar with the TBSTYLE_TOOLTIPS style, then handle the TTN_GETDISPINFO notification to provide the text for the tooltip.

--Mike--
Yeah, payin' the bills with my mad programming skillz.
Defraggin' my hard drive for thrills.
Homepage | RightClick-Encrypt | 1ClickPicGrabber
"You have Erica on the brain" - Jon Sagara to me

Re: Toolbar Tooltips

cleathley19-Apr-03 19:09

cleathley

19-Apr-03 19:09

here is a bit code I just threw together.. ofcouse you would want to check the id of each controll and return a different string (either in the 80bytes allocated, or a pointer to one)

<br />
		case WM_NOTIFY:<br />
			{<br />
				LPNMHDR pnmhdr = (LPNMHDR)lParam;<br />
				switch (pnmhdr->code)<br />
				{<br />
					// tooltip notify<br />
					case TTN_GETDISPINFO:<br />
					{<br />
						LPNMTTDISPINFO lpnmtdi = (LPNMTTDISPINFO) lParam;<br />
						if (lpnmtdi->hdr.idFrom == IDC_XXXX)<br />
						{<br />
							strcpy(lpnmtdi->szText, "hello");<br />
							lpnmtdi->uFlags = TTF_DI_SETITEM;<br />
						}<br />
					}<br />
					break;<br />
				}<br />
			}<br />
			break;<br />

hope it helps

Re: Toolbar Tooltips

Nick Parker20-Apr-03 3:43

Nick Parker

20-Apr-03 3:43

Michael Dunn wrote:
Yeah, payin' the bills with my mad programming skillz.
Defraggin' my hard drive for thrills.

Calm down Mike. Poke tongue | ;-P

-Nick Parker

SQL statement parsing

alex.barylski19-Apr-03 14:35

alex.barylski

19-Apr-03 14:35

I'm writting one for fun and i've only just began to realize that it's quite a tricky process. The implementation i have used is probably not the best(nor is it finished) so i would like to here how maybe more experienced programmers have tackled similar tasks.

(is my lingo correct???)
I basically parse the statement into the following token categories:
1) Command token (SELECT, CREATE, etc)
2) Fields token (mytable.name, etc)
3) Tables token
4) Expression token (mytable.name = 'test')
5) Misc token(s) (ORDER BY, LIMIT, etc)

Once the statement is parsed into the following categories some tokens are further parsed by another parsing engine, like expression tokens will later be passed to an Expression evaluator where again it will be broken down into smaller tokens like < = > + * /, etc...

Anyways, from whats been said, does it sound like i'm on the right track???

Oh yeah, heres another important part:

I start parsing by extracting the COMMAND from the original string
So: SELECT * FROM temp WHERE name = 'Test'
Becomes: * FROM temp WHERE name = 'Test'

This is accomplished using the function CParse::ExtractCommand()

Then I would call CParse::ExtractFields() and so on...

Is there another way to accomplish this???

Any ideas???

Thanks Smile | :)

"Two wrongs don't make a right, but three lefts do!" - Alex Barylski Smile | :)

Toni7819-Apr-03 15:01

Re: SQL statement parsing

19-Apr-03 15:01

I have written parsing routines a couple of years ago to parse circuit descriptions, and let me tell you that it gets really tricky. At that time I remember that I started doing some readings on parsers, compilers, etc and they would use graph theory which I must say I have no clue how to use it. I mean I kind of know the basics from my math classes but that's about it. However, the approach that you are using for your SQL parsers is something that works just fine because most of us (my friends and I) followed the same logic to parse circuit descriptions.

// Afterall I realized that even my comment lines have bugs

alex.barylski20-Apr-03 17:05

alex.barylski

20-Apr-03 17:05

Interesting... Smile | :)

"Two wrongs don't make a right, but three lefts do!" - Alex Barylski Smile | :)

mfc dll <-> app communication

eXplodus19-Apr-03 11:48

eXplodus

19-Apr-03 11:48

little question.

is there a chance to get a pointer back to the application.
and to use the functions of the application?
or to get data from the application.

or is the only way to send messages?

how could i communication between the dll and the application.
i could call a dll function.
but how is it if a export a view and wanna call a function from the mainframe or from
the document class?

any ideas?

valikac19-Apr-03 12:15

valikac

19-Apr-03 12:15

The DLL has a message queue. Handle the incoming message.

Kuphryn

Neville Franks19-Apr-03 12:29

Neville Franks

19-Apr-03 12:29

Well you can pass a pointer from the app to the DLL and then it can use that. If the functions are in your CMainFrame class et.all. then you can use MFC functions in your DLL to get a ptr to these.

Another alternative is "Calling an Exported Function in an EXE from Within a DLL" http://codeguru.earthweb.com/dll/ExportingFromExe.html[^]

Neville Franks, Author of ED for Windows. www.getsoft.com
Make money with our new Affilate program

Bartosz Bien20-Apr-03 4:37

20-Apr-03 4:37

As you import functions from DLL to your application, and not the other direction, application-defined classes should not be called by the DLL.

Use MFC extension DLL to export a view class for your app's framework.

Regards,
BB

eXplodus21-Apr-03 4:14

eXplodus

21-Apr-03 4:14

thats ok, and how did i got a pointer back to my app? and (myApp*) AfxGetApp() ??

Bartosz Bien21-Apr-03 4:24

21-Apr-03 4:24

1. Thou shalt not include CMyApp definition in a DLL.
2. You may use AfxGetApp() to send messages to your app, but I personally don't like such solutions - this is not what DLLs are for. Dead | X|

Regards,
BB

eXplodus21-Apr-03 6:00

eXplodus

21-Apr-03 6:00

i know it.
but i need to get pointers back to my app.
and messages are a bad way. but the only way that i know

Getting Ethernet Card ID

Toni7819-Apr-03 11:08

Re: Getting Ethernet Card ID

19-Apr-03 11:08

Another question. How can I get the ethernet card number of a computer because I've read somewhere that that number is unique and I would like to explore the possibility of using it at a unique identifier to protect my software. That's why I want to read BIOS info too, because I can get the motherboard number etc. I have seen DiskId32 but that was too confusing and frustratting enough for me I couldn't find any of the macros, data structures, and functions used by the software.

// Afterall I realized that even my comment lines have bugs

Phil Hamer19-Apr-03 16:38

Phil Hamer

19-Apr-03 16:38

Check this out:

http://tangentsoft.net/wskfaq/examples/getmac-netbios.html

They also show 2 other methods that don't rely on having NetBIOS.

Re: Getting Ethernet Card ID

Toni7821-Apr-03 11:29

21-Apr-03 11:29

Thank you very very much Philnessosity.

// Afterall I realized that even my comment lines have bugs

Reading BIOS

Toni7819-Apr-03 11:03