Re: Restricting access to Windows - C / C++ / MFC Discussion Boards

James R. Twine4-Jan-07 8:16

4-Jan-07 8:16

I think a global keyboard hook can catch everything except the SAS. If not a keyboard hook, then a CBT hook can... I am pretty sure one of them can catch everything except the SAS...

Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
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Re: Restricting access to Windows

Mark Salsbery4-Jan-07 8:18

Mark Salsbery

4-Jan-07 8:18

I'm drawing a blank....what is "the SAS"?

Thanks,
Mark

Re: Restricting access to Windows

David Crow4-Jan-07 8:23

David Crow

4-Jan-07 8:23

Secure Attention Sequence, which is what's required for access to Ctrl-Alt-Del.

More

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

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

Re: Restricting access to Windows

Mark Salsbery4-Jan-07 8:28

Mark Salsbery

4-Jan-07 8:28

Thank you!

Re: Restricting access to Windows

pcfilho4-Jan-07 8:12

pcfilho

4-Jan-07 8:12

My program has some keyboard commands I've got to keep.

I would like to block only those commands which allow access to Windows.

Anyway, thanks for your help.

PCFilho
Rio de Janeiro, Brazil

Re: Restricting access to Windows

Mark Salsbery4-Jan-07 8:19

Mark Salsbery

4-Jan-07 8:19

Well don't eat ALL the keyboard messages Smile | :)

Re: Restricting access to Windows

pcfilho5-Jan-07 10:07

pcfilho

5-Jan-07 10:07

I've researched the matter today; studied the Visual Studio documentation; but couldn't make it work.

It seems that SetWindowsHookEx() uses a callback function KeyboardProc(). But I found the documentation too confuse, and did not find any example code to help.

Maybe it is just the Friday effect, or the effect of all those Christmas foods, but I just couldn't understand it.

Confused | :confused:

So, I would really appreciate more help.

Thanks!

PCFilho
Rio de Janeiro, Brazil

Re: Restricting access to Windows

Mark Salsbery5-Jan-07 11:26

Mark Salsbery

5-Jan-07 11:26

I haven't written a keyboard hook so I have no code I can post but a quick search yielded
this article[^] and this article[^]

These should be helpful. Basically once you've installed the hook, in your hook proc you'll
need to look at the key code and if you want to eat the code, return TRUE, otherwise call the
next proc in the hook chain to let the message get processed as usual.

As others have noted, you won't be able to trap ctrl-alt-delete...the first article link above
explains this a bit Smile | :)

Mark

Re: Restricting access to Windows

pcfilho8-Jan-07 8:49

pcfilho

8-Jan-07 8:49

Thank you, Mark.

These articles are helping me very much...

King regards,

PCFilho
Rio de Janeiro, Brazil

Runtime problems in VC++ Express 2005

fyrebyrd4-Jan-07 7:14

fyrebyrd

4-Jan-07 7:14

hi, happy new year. i'm having a problem with some open source frameworks, and i think it's a compiler problem. when i compiled the FOX toolkit (www.fox-toolkit.org) using the bundled VC++ solution, i configure the build by adding some external libraries (namely zlib, bzip2, libpng, jpeglib, and libtiff), by defining some constants (as suggested in the instructions). here's where the problem is: the library built fine, but when i tried building one of the examples, the linker gave errors about the C runtime library already linked in, and multiply defined symbols. i've had this problem before (after building wxWdigets and using it for an application), and i had to delete the project, rebuild the libray and recode the application. i'd rather not fluke fixing the problem. how can i fix this o i know exactly what to do everytime the problem comes up? thanks.

Can I convert HWND to CWnd object

Max++4-Jan-07 7:12

Max++

4-Jan-07 7:12

I use
EnumChildWindows();
for get "handle" of control in target window.
then I want to use IsKindof() function that is member of CWnd for check it is CEdit object or not.

Can I do like this?

Re: Can I convert HWND to CWnd object

David Crow4-Jan-07 7:59

David Crow

4-Jan-07 7:59

Use CWnd::Attach().

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

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

Re: Can I convert HWND to CWnd object

James R. Twine4-Jan-07 8:08

James R. Twine

4-Jan-07 8:08

Heh - you answered his subject, but that will not work for what he really wants to do as specified in his message.

Peace!

Re: Can I convert HWND to CWnd object

Mark Salsbery4-Jan-07 8:07

Mark Salsbery

4-Jan-07 8:07

You can associate a HWND with a CWnd object using CWnd::Attach() BUT...
IsKindOf() works with object types so I don't think this will work for you.

You could use GetClassInfoEx() and examine the WNDCLASSEX lpszClassName member to find the
window's type.

Mark

Re: Can I convert HWND to CWnd object

James R. Twine4-Jan-07 8:13

James R. Twine

4-Jan-07 8:13

   That will not work correctly, at least not the way you would want it to.

   You can pass the HWND to the ::GetClassName(...) function. Look up that function for more info on how to use it.

   If the control is a standard Edit control, the returned class name will be EDIT. Lookup the predefined window classes for more info.

   You could also check by sending the window a edit-control-specific message and see if the response you get back makes sense.

   Peace!

Re: Can I convert HWND to CWnd object

Mark Salsbery4-Jan-07 8:16

Mark Salsbery

4-Jan-07 8:16

::GetClassName()!! D'Oh! | :doh:

I knew it existed but I swear I couldn't find it.
If only Microsoft used a more appropriate name for the API Roll eyes | :rolleyes:

Re: Can I convert HWND to CWnd object

Stephen Hewitt4-Jan-07 12:05

Stephen Hewitt

4-Jan-07 12:05

Look up CWnd::Attach, CWnd::FromHandle and CWnd::FromHandlePermanent. Which you use depends on your situation.

Steve

Re: Can I convert HWND to CWnd object

Hamid_RT4-Jan-07 18:03

Hamid_RT

4-Jan-07 18:03

You can use of CWnd::FromHandle
and From the MSDN:
"If a CWnd object is not attached to the handle,a temporary CWnd object is created and attached"

WhiteSky

Re: Can I convert HWND to CWnd object

prasad_som4-Jan-07 18:05

prasad_som

4-Jan-07 18:05

Max++ wrote:
then I want to use IsKindof() function that is member of CWnd for check it is CEdit object or not

CWnd::FromHandle is one option.

Max++ wrote:
function that is member of CWnd for check it is CEdit object or not.

You can achieve this without using above approach. Have a look at this code ,

static const TCHAR szEdit[] = _T("Edit");
TCHAR szCompare[256] = {0};
::GetClassName(hEdit, szCompare,256);
if (lstrcmpi(szCompare, szEdit) == 0)
{
	//Edit box class
}

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

XP style warning when caps lock on when entering password

thefainster4-Jan-07 6:11

thefainster

4-Jan-07 6:11

Hi
Does anyone know how to get this behaviour to appear within a CDialog (with an editbox set with password property)?
I'm using VS2003.

Re: XP style warning when caps lock on when entering password

James R. Twine4-Jan-07 6:36

James R. Twine

4-Jan-07 6:36

   Normally, you will get this functionality automatically [1] when running on XP (or above?) and [2] your application has a common control manifest that specifies that the new/XP common control libraries be used.

   Or are you asking how you can create that behavior so that your application always does something like it, regardless of platform or manifest?

   Peace!

Re: XP style warning when caps lock on when entering password

thefainster4-Jan-07 7:20

thefainster

4-Jan-07 7:20

Yes, running on XP, not too concerned about other platforms.
Here is my manifest - am I not specifying the correct libraries?

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
<assemblyIdentity
version="1.0.0.0"
processorArchitecture="X86"
name="Microsoft.Windows.TestApp"
type="win32"
/>
<description>Your app description here</description>
<dependency>
<dependentAssembly>
<assemblyIdentity
type="win32"
name="Microsoft.Windows.Common-Controls"
version="6.0.0.0"
processorArchitecture="X86"
publicKeyToken="6595b64144ccf1df"
language="*"
/>
</dependentAssembly>
</dependency>
</assembly>

Re: XP style warning when caps lock on when entering password

James R. Twine4-Jan-07 8:19

James R. Twine

4-Jan-07 8:19

   That looks correct to me - do you have it in the correct location? If not embedded, it should be in an external file named the same as your executable file with .manifest appended to it.

   For example, if your executable is called MyApp.exe, the manifest file should be MyApp.exe.manifest, and kept in the same directory that the executable is in.

   Peace!

Re: XP style warning when caps lock on when entering password

thefainster4-Jan-07 9:47

thefainster

4-Jan-07 9:47

James

Many thanks for your help. I've finally sorted it! Big Grin | :-D

I've added an external manifest (ensuring the language is set to English(US) in the resource properties, and as if by magic, the XP Themes are applied.

Graham

Bitmap in ListCtrl - transparent bgtext color?

thefainster4-Jan-07 4:50

thefainster

4-Jan-07 4:50

Hi everyone

Ive recently been tasked to add a bitmap to a listctrl, which ive done sucessfully, with a little help from Matt Weagle's excellent article (http://www.codeproject.com/listctrl/listctrldemo.asp[]

However, when text is placed over it, the text background color is white (which obviously obcures the image).

This was fine - even the demo app does this, but having passed this code to my collegue, his bitmap doesnt get obscured. We are using the same code, environment, both using Visual Studio 2003. Checked everything I can think of (project settings, resource & stdafx files etc.).

Can anyone help please?

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