GetLastError - C / C++ / MFC Discussion Boards

Re: CSliderCtrl and TB_THUMBTRACK

C^hris L^osinger20-Sep-02 5:10

C^hris L^osinger

20-Sep-02 5:10

is there any reason you want to do a thumb-track on the slider? you get the same results by just using OnHScroll:

void CSettings::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{
   CSliderCtrl *theThing=(CSliderCtrl*)pScrollBar;

   if (theThing==(CSliderCtrl *)GetDlgItem(IDC_CONTROL_I_WANT_TO_WATCH)) 
   {
     pos = theThing->GetPos();
   }
}

this will be called every time the thumb moves (just like a THUMBTRACK event on a scrollbar)

-c

As always, it's bread and circuses. And while bread is down right now, circuses are way up.

War Pigs

Re: CSliderCtrl and TB_THUMBTRACK

Jawache20-Sep-02 5:20

Jawache

20-Sep-02 5:20

Thanks..
I did it the hard way .. tracking the mouse.
I'll remember that for the future though.

Asim Hussain
e: asim@jawache.net
w: www.jawache.net

different HWND, but same HDC

mishgun20-Sep-02 0:16

mishgun

20-Sep-02 0:16

I've got 4 views that are child windows of one view.
Parent view calls children's specific method to do some drawing.
And in this method different child views have different HWND, but _SAME_ HDC
so drawing occurs only in 1 child view.

any suggestions?

thanks in advance.

nobody is perfect

Opening only one instace of template in MDI

bobs19-Sep-02 23:22

bobs

19-Sep-02 23:22

Hi,

I want to open only one set/window (doc + ChildFrame + view) on pressing menu button which replaces OnFileNew().
If the button is pressed again the window shoud be brought forward if it was unactive.
I found CDocTemplate::GetNextDoc() function which stores documents (CDocument*) created for any particular template. If GetFirstDocPosition() gives NULL no document was instantiated therefore no window displayed, so the button should create/displayed this window. Otherwise activate the already existing one. Is my understanding correct or maybe there are more elegant solutions?
siema. Cool | :cool:

Rafal

Re: Opening only one instace of template in MDI

Ryan B.20-Sep-02 5:22

Ryan B.

20-Sep-02 5:22

so you want only one document to be open in an MDI application?
if a document is open you want it to be "activated", otherwise create a new one?

Ryan Baillargeon
Software Specialist
Fuel Cell Technologies Inc.

Re: Opening only one instace of template in MDI

bobs22-Sep-02 21:45

bobs

22-Sep-02 21:45

only one document of any kind.
For example have 4 buttons each for creating diffrent document.
On press any of these buttons I want document to be created if not created already or "activated" if created.
Back to my original question, is there any well known solution to that "problem"

Rafal Bober

ADO

rrrado19-Sep-02 23:20

rrrado

19-Sep-02 23:20

Hi, how to find out, whether is ADO / mdac correctly installed with MS Access database drivers ? I'm using ADO, i need to check that so i could write some intelligent message to user.

rrrado

GetLastError

Mazdak19-Sep-02 22:48

Mazdak

19-Sep-02 22:48

I use GetLastError in my code.It return this error for me:

Error Code:997 Overlapped I/O operation is in progress.

What does this error mean?

Mazy

"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down

Re: GetLastError

Arjan Schouten19-Sep-02 23:37

Arjan Schouten

19-Sep-02 23:37

Are you doing Serial communications?
If so, This is ERROR_IO_PENDING and is NO ERROR!!

It just means that WaitCommEvent or ReadFile is busy reading characters but the function returns to let you do some other stuff untill its ready. Or something like that.

Search MSDN Online for "Serial Communications in Win32". This helped me a lot.

van padoea.

Re: GetLastError

Lakitu19-Sep-02 23:37

Lakitu

19-Sep-02 23:37

That's really hard to tell without knowing the surrounding code.

Textbooks for advanced MDI database projects

bobs19-Sep-02 22:41

bobs

19-Sep-02 22:41

Hi,

I am relatively new in MDI database development (3 weeks) although seasoned C++ campaigner. Could you please advice me about advanced (the basic staff I have) textbooks regarding MDI (Multi. Doc. Inter.) development.

siema (regards)
Rafal

Re: Textbooks for advanced MDI database projects

Ryan B.20-Sep-02 5:23

Ryan B.

20-Sep-02 5:23

Id be interested as well.. =)

Ryan Baillargeon
Software Specialist
Fuel Cell Technologies Inc.

Re: Textbooks for advanced MDI database projects

Neville Franks20-Sep-02 11:13

Neville Franks

20-Sep-02 11:13

Any of the basic Win32 API Books such as Petzold cover MDI. I don't know how Database and MDI fit together though. You are better off to focus on the Document - VIew architecture. MDI/SDI are simply different ways of using that.

Neville Franks, Author of ED for Windows. www.getsoft.com

How to find/get a remote cd/dvd-rom by interne?t

chen19-Sep-02 22:39

chen

19-Sep-02 22:39

Hi,

I needed to do some compare works with two DVD-ROMs --- the one is a local
dvdrom and the other is a remote dvdrom. My question is how to find/get
the remote dvdrom by using aspi scsi command and some proper internet settings?
Would you please points me some useful materials ?

Thanks in advance!

chen

Re: How to find/get a remote cd/dvd-rom by interne?t

Mike Nordell20-Sep-02 4:53

Mike Nordell

20-Sep-02 4:53

chen wrote:
how to find/get
the remote dvdrom by using aspi scsi command

You can't. ASPI is inherently locked to the HA on the hardware (machine) your program is running on.

.NET and MFC !

Hadi Rezaee19-Sep-02 21:56

Hadi Rezaee

19-Sep-02 21:56

Hello there,
Does Microsoft stop MFC supporting in VC++ .NET ??
Is it right ?

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: .NET and MFC !

Nish Nishant19-Sep-02 22:11

Nish Nishant

19-Sep-02 22:11

NO! VC++.NET has MFC7

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Re: .NET and MFC !

Stephane Rodriguez.19-Sep-02 23:13

Stephane Rodriguez.

19-Sep-02 23:13

It is supported, but be warned it is not backward compatible. It is very likely a VC++6.0 dsw/dsp project does not recompile with 0 error.

Though most errors can be easily handled, some of them turn out to be much tougher in practice, because the STL code (templates everywhere) is behind all MFC code now.

Recompiling the code requires updating stuff either from MFC classes, or ATL classes.

Distribution also changes. Now it is MFC70.DLL, MSVCRT70.DLL, ... (in fact you have a merge module in the VS.NET cd).

Good luck!

If you have spare time, an article about tips for the upgrade would be welcome! Rose | [Rose]

MS quote (http://www.microsoft.com/ddk) : As of September 30, 2002, the Microsoft® Windows® 2000 DDK, the Microsoft Windows 98 DDK, and the Microsoft Windows NT® 4.0 DDK will no longer be available for purchase or download on this site.

Re: .NET and MFC !

Hadi Rezaee19-Sep-02 23:19

Hadi Rezaee

19-Sep-02 23:19

Hello Stephane,

Thanks for useful reply Smile | :)

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Thread problem !

Hadi Rezaee19-Sep-02 21:53

Hadi Rezaee

19-Sep-02 21:53

Hello there ...
What's wrong in below code ?

void CTestthreadDlg::OnStart()
{
DWORD dwThreadID, dwThreadParam = 1;

hThread = ::CreateThread( NULL, 0, ThreadFunc, &dwThreadParam, 0, &dwThreadID );
}

DWORD WINAPI CTestthreadDlg::ThreadFunc(LPVOID lpParam)
{
m_List.AddString( "I wanna die, die for you ... Cause i know you are my only one" ); // Poke tongue | ;-P

return 0;
}

Compiler show me this error:

E:\Microsoft Visual Studio\MyProjects\testthread\testthreadDlg.cpp(102) : error C2664: 'CreateThread' : cannot convert parameter 3 from 'unsigned long (void *)' to 'unsigned long (__stdcall *)(void *)'
None of the functions with this name in scope match the target type

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: Thread problem !

Nish Nishant19-Sep-02 22:16

Nish Nishant

19-Sep-02 22:16

Make your thread-proc function static

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Re: Thread problem !

Hadi Rezaee19-Sep-02 22:34

Hadi Rezaee

19-Sep-02 22:34

Well, now my source code works fine by declaring ThreadFunc as global !

Cup, can you show me how declare ThreadFunc as static function ?

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: Thread problem !

Nish Nishant19-Sep-02 22:42

Nish Nishant

19-Sep-02 22:42

Hadi_Rezaie wrote:
Cup, can you show me how declare ThreadFunc as static function ?

Hmmmm! No one's ever called me "cup" before Smile | :)

Anyway making a member function static is easy. Just add static to the function declaration.

For example :-

static int GetTotal();

Regards,
Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Re: Thread problem !

Hadi Rezaee19-Sep-02 22:45

Hadi Rezaee

19-Sep-02 22:45

Hello dear Nishant S Rose | [Rose]

I'm so sorry about my wrong in typing your name ...
It's because i asked this question in two message board, cup is the name of he ...

And i want to thank you for all helps Wink | ;)

With Best Regards

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: Thread problem !

Hans Ruck19-Sep-02 22:14

Hans Ruck

19-Sep-02 22:14

I think the method ThreadFunc should be declared as static.
Or you can use an ordinary function, not a method. This, i think, is the best choice because it always keeps you away from the attempt of using static/non static members in a static method.

rechi

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