Re: How to capture "Enter Key"? - C / C++ / MFC Discussion Boards

Re: How to capture "Enter Key"?

«_Superman_»1-Apr-09 20:32

«_Superman_»

1-Apr-09 20:32

Assuming you are using MFC, simply override the OnOK() and OnCancel() in you dialog class.

«_Superman_»
I love work. It gives me something to do between weekends.

Re: How to capture "Enter Key"?

gothic_coder1-Apr-09 20:36

gothic_coder

1-Apr-09 20:36

Damn.. I always forgot to tell you guys it's NON-MFC..
Sorry ..

Re: How to capture "Enter Key"?

Code-o-mat1-Apr-09 22:32

Code-o-mat

1-Apr-09 22:32

Hey!

On a side note: having a button that gets enabled when a correct password is entered makes it a bit easier to guess the password by bruteforce (or/and maybe other methods) because one only has to write a program that enters a password and then checks the state of the button, if it is disabled, it tries the next possible password and checks the button again until the button becomes enabled... althorough you can add a -let's say- 3 seconds pause if a wrong password is entered before the user is allowed to enter the next password, this makes it take much much more time to hack.
Aside of this, did you try handling WM_KEYDOWN? Did it work?

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Life: great graphics, but the gameplay sux. <

Re: How to capture "Enter Key"?

gothic_coder1-Apr-09 23:29

gothic_coder

1-Apr-09 23:29

Code-o-mat wrote:
Hey!

On a side note: having a button that gets enabled when a correct password is entered makes it a bit easier to guess the password by bruteforce (or/and maybe other methods) because one only has to write a program that enters a password and then checks the state of the button, if it is disabled, it tries the next possible password and checks the button again until the button becomes enabled... althorough you can add a -let's say- 3 seconds pause if a wrong password is entered before the user is allowed to enter the next password, this makes it take much much more time to hack.

That's not the issue Smile | :)

Code-o-mat wrote:
Aside of this, did you try handling WM_KEYDOWN? Did it work?

Yes i did.. But it's not working, i tried WM_CHAR also same result

case WM_CHAR : 
{
	switch(LOWORD(wParam))
	{
		case VK_RETURN:
			MessageBox(hWnd, "Enter Pressed", NULL, NULL);
	}
}

case WM_KEYDOWN : 
{
	switch(LOWORD(wParam))
	{
		case VK_RETURN:
			MessageBox(hWnd, "Enter Pressed", NULL, NULL);
	}
}

P.S
BTW the default focus is in password (Edit) box only, Does this create any problem?

Re: How to capture "Enter Key"?

Code-o-mat1-Apr-09 23:33

Code-o-mat

1-Apr-09 23:33

Try catching WM_COMMAND with IDOK as command id.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Life: great graphics, but the gameplay sux. <

Re: How to capture "Enter Key"?

gothic_coder1-Apr-09 23:59

gothic_coder

1-Apr-09 23:59

Code-o-mat wrote:
Try catching WM_COMMAND with IDOK as command id.

There's no button in my dialog box, I deleted all, I needed custom buttons so i'm using BITMAP's for that Smile | :)

I also don't want to create button as IDOK and make it invisible.. I hope you're getting my problem..

Re: How to capture "Enter Key"?

Code-o-mat2-Apr-09 0:20

Code-o-mat

2-Apr-09 0:20

You don't need a button for that, if you are using MFC and override OnOK, it will be called when you hit enter EVEN if there is no IDOK or any other button for that matter on your dialog. I am not sure how it works without MFC but it might be worth a try. The keyhits go to the window that owns the input focus so that explains why WM_KEYDOWN in your dialog doesn't work...

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Life: great graphics, but the gameplay sux. <

Re: How to capture "Enter Key"?

gothic_coder2-Apr-09 1:31

gothic_coder

2-Apr-09 1:31

Wow..Your last reply makes it real small problem Smile | :)

.. Thanks a lot...

Problem solved Smile | :)

Re: How to capture "Enter Key"?

Code-o-mat2-Apr-09 1:34

Code-o-mat

2-Apr-09 1:34

Great, yourwelcome. Thumbs Up | :thumbsup:

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Life: great graphics, but the gameplay sux. <

CMainwindow

p_19601-Apr-09 20:20

p_1960

1-Apr-09 20:20

void CMainWindow::OnPaint ()
{
CPaintDC dc (this);
CBrush brush (RGB (255, 0, 0));
dc.SelectObject (&brush);
dc.Ellipse (0, 0, 200, 100);
}

Here's the problem. A CPaintDC object and a CBrush object are created on the stack. Since the CBrush is created second, its destructor gets called first. Consequently, the associated GDI brush is deleted before dc goes out of scope.

Please can u explain the concept of the above lines in detail....

Re: CMainwindow

Stuart Dootson1-Apr-09 22:01

Stuart Dootson

1-Apr-09 22:01

You could always create the brush before the DC....

p_1960 wrote:
Please can u explain the concept of the above lines in detail....

Which concept? That objects allocated on the stack are destructed strictly in the opposite order to which they were created?

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: CMainwindow

Iain Clarke, Warrior Programmer2-Apr-09 6:24

Iain Clarke, Warrior Programmer

2-Apr-09 6:24

p_1960 wrote:
Please can u explain the concept of the above lines in detail....

Nope, Got better things to do! (Sun is shining...)

But you are right to be slightly concerned.

The brush returned from SelectObject should have been selected back in. You'd almost certainly get away with the code as it is, but "get away with" is hardly good programming.

Better:

void CMainWindow::OnPaint ()
{
   CPaintDC dc (this);
   CBrush brush (RGB (255, 0, 0));
   CBrush *brOld = dc.SelectObject (&brush);
   dc.Ellipse (0, 0, 200, 100);
   dc.SelectObject (brOld);
}

Iain.

In the process of moving to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), give me a job!

How to retrieve contents of a control in a different application?

neil47811-Apr-09 19:51

neil4781

1-Apr-09 19:51

Hi,

I was wondering if there is a way to retrieve contents of a control(let's take list control) of another application? I think we can reach the control via FindWindowEx. But how we retrieve the contents?

Thanks a bunch!
Neil

Re: How to retrieve contents of a control in a different application?

Stuart Dootson1-Apr-09 22:09

Stuart Dootson

1-Apr-09 22:09

If you have the window handle, you can send it messages. Like, for example, LVM_GETITEM[^], which you use to retrieve item details from a list control.

However, I'm unsure if it'll work cross-process. Try it and see!

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: How to retrieve contents of a control in a different application?

sashoalm4-Apr-09 3:32

sashoalm

4-Apr-09 3:32

Stealing Program's Memory[^]

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

Another Stupid Question?

Joseph Marzbani1-Apr-09 19:35

Joseph Marzbani

1-Apr-09 19:35

I am working in a company with a lot of FREE time. Newly we've got a desktop computer for our office, but with a LIMITED user. One of the most terrible limitation is that we are not able to install ANYthing. Is there a way to get around this problem. By the way! Is there any way to recover ADMINISTRATOR password?

Thank you masters!

Re: Another Stupid Question?

«_Superman_»1-Apr-09 19:45

«_Superman_»

1-Apr-09 19:45

You can ask somebody who knows the password for it.

If it was so easy to do it that you expect a reply for this, Windows would have been long gone.
I mean who would want to use an OS which can be very easily compromised.

«_Superman_»
I love work. It gives me something to do between weekends.

Re: Another Stupid Question?

Joseph Marzbani1-Apr-09 20:12

Joseph Marzbani

1-Apr-09 20:12

Frankly speaking! I knew this! Cool | :cool:

But I got a brother who doesn't trust me and still believes there must be a way to do that. I just wanted to prove my word !!! Wink | ;)

that's why I said STUPID question ...

Thank you masters!

Re: Another Stupid Question?

Iain Clarke, Warrior Programmer2-Apr-09 6:15

Iain Clarke, Warrior Programmer

2-Apr-09 6:15

Suuuuuure, it was your brother. I believe you. Really! Poke tongue | ;-P

Iain.

In the process of moving to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), give me a job!

Re: Another Stupid Question?

Maxwell Chen1-Apr-09 20:24

Maxwell Chen

1-Apr-09 20:24

The methods[^]... $Shucks | :-\$

Maxwell Chen

Re: Another Stupid Question?

vital_parsley1-Apr-09 21:46

vital_parsley

1-Apr-09 21:46

use a pirated copy !!! or linux Poke tongue | ;-P

sorry i dint understand ur question Laugh | :laugh:

Re: Another Stupid Question?

Joseph Marzbani1-Apr-09 22:53

Joseph Marzbani

1-Apr-09 22:53

wow! my brother was right! he has a tiny great application, enabling him to do it. microsoft???

Thank you masters!

Windows Message API problem for LVM_GETITEMTEXT

Joshi, Rushikesh1-Apr-09 19:30

Joshi, Rushikesh

1-Apr-09 19:30

Hi All,

I am trying to read text from ListView of other application.

I have created a demo application which is working fine for all listview (FolderView/ Winzip Listview control and listview of some application), but it is not working for a particular Listview.

I am able to get the RowCounts/ Column Counts but I am not able to read text.

Below is my code which I am executing to get ListItem.

The original code is in VB6, but Message API code/messages are similar in VC++/MFC.

<pre>Private Const LVM_FIRST = &H1000
Private Const LVM_GETITEMCOUNT = (LVM_FIRST + 4)

Private Const LVM_GETITEM = (LVM_FIRST + 5)
Private Const LVM_GETSTRINGWIDTH = (LVM_FIRST + 17)
Private Const LVM_GETCOLUMN = (LVM_FIRST + 25)
Private Const LVM_GETITEMTEXT = (LVM_FIRST + 45)

strLength = SendMessage(hWindow, LVM_GETITEMTEXT, iItem, ByVal pMyItemMemory)</pre>

Above code is working fine for other listview, and strLength is returning currect length of text of the List item.

I tried to debug, and understand nature of window (Listview Window) and I observed that all other listview where it is working fine having Windows Proc as Unicode and for list where it is not working having Windows Proc as ANSI (I got this information using Windows Spy++ utility).

My understanding is to get listview item for ANSI strings there would be different message needs to pass.

I appreciate your time and thanking you for any help or direction.

Regards
Rushi

Re: Windows Message API problem for LVM_GETITEMTEXT

«_Superman_»1-Apr-09 19:49

«_Superman_»

1-Apr-09 19:49

You could specifically try to use SendMessageA.

«_Superman_»
I love work. It gives me something to do between weekends.

Re: Windows Message API problem for LVM_GETITEMTEXT

Joshi, Rushikesh1-Apr-09 23:44

Joshi, Rushikesh

1-Apr-09 23:44

Hi Superman Smile | :)

,

Thank you for your prompt reply.

But i guess I am using SendMessageA only see my declaration.

Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByRef lParam As Any) As Long
</pre>

Regards
Rushi

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