C / C++ / MFC

Re: unable to load driver

12-Oct-06 0:36

Is http://www.codeproject.com/system/DevMgr.asp[^] helpful?

WhiteSky

mpk197912-Oct-06 1:46

mpk1979

12-Oct-06 1:46

what is the Error Code it is returning...can you send the code snippet

MFC Messages

baerten11-Oct-06 23:45

baerten

11-Oct-06 23:45

I have a MDI Project

With a MainFrm (1)
There i open Child-Windows of type CMDIChildWnd (2)
A View of element as type CFormView (3)
And the content of the View is a Dialog (made with the Ressource Designer) (4)

If i start the applic and hit a key on the ChildWindow. Which element does get the OnKeyDown Event?

2 & 3 does it not get.
It's logic that the "highest" Element receive the message -> 4: The Dialog

But i "linked" myself the Dialog to the CFormView ...
I saw that it's possible to create directly the CFormView from out the Designer with "Add Class"

Now i don't have a reaction if i hit a key on the Childform
Is it absolute necessairy to create the CFormView with the Designer?

In my CFormView i have

afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);<br />
<br />
BEGIN_MESSAGE_MAP(TheViewClass, CFormView)<br />
  . <br />
  .<br />
  .<br />
  ON_WM_KEYDOWN()<br />
END_MESSAGE_MAP()<br />
<br />
void TheViewClass::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)<br />
{<br />
  CFormView::OnKeyDown(nChar, nRepCnt, nFlags); // BREAKPOINT HERE<br />
}

Is it the right procedure to make ChildForms ?

Big thanks

Re: MFC Messages

tuxyboy12-Oct-06 0:26

tuxyboy

12-Oct-06 0:26

The event goes to the elemenet that has the focus.
Check differences between onchar and onkeydown events....

Re: MFC Messages

baerten12-Oct-06 2:07

baerten

12-Oct-06 2:07

Ok i see, that seems logic

So i need to have in each class, that has the focus, a Message-Handler for KeyDown with the corresponding afx_msg On_KeyDown

If i want catch a KeyDown on an CEdit Textbox, i need to derive a class from CEdit that
has a OnKeyDown ...

correct? WTF | :WTF:

Can i say this->getParent()->getParent() to access the MainForm ?

Many thanks ! Smile | :)

All these questions aren't in MFC Books, so it's hard to find a resolution by myself Unsure | :~

Language independent in Dlls

Krishnatv11-Oct-06 23:17

11-Oct-06 23:17

Normal Dlls are language dependent or Not ?
can we use C dll in C++ and viceversa ?

I read that Com Dlls Are Language independent And Normal Dlls Are Not.
Is it True ?

Cedric Moonen11-Oct-06 23:42

Cedric Moonen

11-Oct-06 23:42

COM are just a specific kind of dll's that follow some rules so that they can be used in different languages. So in brief, if you take some special considerations, your C dll can be used in C++, VB and other languages.

Cédric Moonen
Software developer

Charting control [Updated - v1.1]

Krishnatv11-Oct-06 23:58

11-Oct-06 23:58

With Out Following COM specifications Can i use My C Dll in C++ or VB ?

Cedric Moonen12-Oct-06 1:20

Cedric Moonen

12-Oct-06 1:20

Yes but you have to take care about calling conventions for example (and don't know exactly everything that you need to take care of). Simply search on google and you'll find quite a lot of article

Cédric Moonen
Software developer

Charting control [Updated - v1.1]

Krishnatv12-Oct-06 1:32

12-Oct-06 1:32

Thanks

Krishnatv12-Oct-06 0:00

GetProcessMemoryInfo Generates LNK 2019

12-Oct-06 0:00

Cedric Moonen wrote:
if you take some special considerations, your C dll can be used in C++, VB and other languages

I think Again you are saying about COM Dll in the Above Context.

mpk197911-Oct-06 23:14

mpk1979

11-Oct-06 23:14

Hi all,

calling GetProcessMemoryInfo is generating error LNK 2019 , can any one help me regarding this.

mpk1979

prasad_som11-Oct-06 23:26

prasad_som

11-Oct-06 23:26

And whats that error ?

Prasad
Notifier using ATL | Operator new[],delete[][^]

mpk197912-Oct-06 0:27

mpk1979

12-Oct-06 0:27

ya, i got it , i need to include psapi.lib in the linker options,thanks

David Crow12-Oct-06 3:14

David Crow

12-Oct-06 3:14

prasad_som wrote:
And whats that error ?

Did you miss "LNK2019" in both the subject and the body?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

prasad_som12-Oct-06 18:44

prasad_som

12-Oct-06 18:44

As usual, I checked LNK 2019 , in MSDN Apr-2001. And could not find it. With VS 6.0 its LNK 2001. Thats why asked for error message.
Though, its present in latest one. I should have checked that.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Hamid_RT12-Oct-06 0:28

How to Use Select [column] From Table where (column= Value) from vc++

12-Oct-06 0:28

Did you see Requirements on MSDN?
Header: Declared in Psapi.h.
Library: Use Psapi.lib.

WhiteSky

himuskanhere11-Oct-06 23:12

himuskanhere

11-Oct-06 23:12

Hello friends
I need your Help!!
I want to Fetch a value of clumn but i am unable to make query in VC++.
plz guide me..
I use pointer of CDaoDataBase class and member Funtion is Execute().
Hoping Best from u!!
Thankx Roll eyes | :rolleyes:

Born To Code

Re: How to Use Select [column] From Table where (column= Value) from vc++

prasad_som11-Oct-06 23:30

prasad_som

11-Oct-06 23:30

Remark from MSDN about Execute:

Execute works only for action queries or SQL pass-through queries that do not return results. It does not work for select queries, which return records.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: How to Use Select [column] From Table where (column= Value) from vc++

Hamid_RT12-Oct-06 0:39

Re: How to Use Select [column] From Table where (column= Value) from vc++

12-Oct-06 0:39

Is this[^] helpful?

WhiteSky

David Crow12-Oct-06 3:18

David Crow

12-Oct-06 3:18

One way is to derive a class from CDaoRecordset. Then just change the GetSQL() method (it default to SELECT *) to select those columns and rows you want.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

C++ Image printing

<color>Aljechin 11-Oct-06 22:54

<color>Aljechin

11-Oct-06 22:54

I want to print a small bitmap image using c++ (not MFC). I don't have a problem in printing normal text. But now I want to print an image.

Re: C++ Image printing

<color>Aljechin 11-Oct-06 23:13

<color>Aljechin

11-Oct-06 23:13

Sorry for incomplete information. I want to print using a standard LPT printer. for example, to print some text we can print simply by writing it into a file (naming the file as "LPT1" inside the program). But how do I print a image?

Re: C++ Image printing

Hamid_RT12-Oct-06 0:28