Re: file system api hook/file system driver - C / C++ / MFC Discussion Boards

DougW4814-Jul-03 19:05

14-Jul-03 19:05

I would like to add functionality to an MFC application where information is e-mailed to a pre-specified address. It would be easy enough to use the existing e-mail software in the computer, but I am not looking to do this, as I don't necessarily want the user to know the e-mail was being sent. I would like some direction on sending an e-mail message out of an MFC application, and doing so without alerting the user to it being sent. I would appreciate any help I can get! Thanks so much Smile | :)

;)

(I thought I'd better note that I am not intending to send "stealth" e-mails for malicious purposes. Believe it or not, there really is an application I am working on which requires this.)

Douglas A. Wright
dawrigh3@kent.edu

Re: Sending E-Mail

El'Cachubrey14-Jul-03 19:41

El'Cachubrey

14-Jul-03 19:41

You can use SMTP protocol and sockets its easy enought.

Why SetLayeredWindowAttributes() makes a window's Z-order higher?

isavegod14-Jul-03 18:16

isavegod

14-Jul-03 18:16

Hi all,

I've made a translucent window in win2k/sp3/vc++6/sp5
using WS_EX_LAYERED and SetLayeredWindowAttributes(). When
I then right click the window body and make it popup a
context menu, I see the displaying of the selected menu
item terribly disturb by that (background) layered window. OMG | :OMG:

It seems the layered window gets a higher z-order and then
tries to show above the menu.

Try this for a clear idea of it:
------------------------------------
1. goto: http://www.codeproject.com/dialog/smoothalpha.asp?target=setlayeredwindowattributes
2. run Kirill's demo and make the window semitransparent
3. right click the edit control
4. move the mouse pointer across the shortcut menu boarder(and select the topmost item - Undo(U))
5. you'll see what happens to the selected part of the menu

------------------------------------
Anyone know why this happens and how to correct it? Confused | :confused:

Thanks

file system api hook/file system driver

anshumanshinde14-Jul-03 18:02

anshumanshinde

14-Jul-03 18:02

hi!,

does anyone a sample code of File system api hook for win9x and win nt/2k.
for win9x we need to write a vxd and for win nt/2k we should write a file system driver.
i need to hook the createfile(),writefile() etc.. calls.

thanks

anshu

Re: file system api hook/file system driver

Mike Nordell14-Jul-03 20:45

Mike Nordell

14-Jul-03 20:45

The mechanisms are completely different for the 16/32-bit shells (9x, ME) than for NT kernel based OSes.

But if you only need to hook Win32 API calls, it'd be much, much, easier to use "injection" and IAT patching. I believe there are examples of this at this site. If not, try codeguru or google and you'll find how to do it.

Re: file system api hook/file system driver

anshumanshinde14-Jul-03 21:04

anshumanshinde

14-Jul-03 21:04

ya i have read about injecting using IAT,its also called api hijacking,i got the article on this site itself.
as you said those are completely different mechanisms for doing the things in win9x/me and ntbased system.
we have to write a vxd for win9x/me and filesystem driver for ntbased systems.
i wanted to do things using these mechanisms.
if u can recommend any good books for the same then it would be helpful.
thank you
anshu

Re: file system api hook/file system driver

Anthony_Yio15-Jul-03 0:49

Anthony_Yio

15-Jul-03 0:49

There are some article in codeproject which might help you up.

Try this.
http://www.codeproject.com/file/directorychangewatcher.asp?target=file%7Cwatcher[^]

good luck.

Re: file system api hook/file system driver

Mike Nordell15-Jul-03 5:22

Mike Nordell

15-Jul-03 5:22

anshumanshinde wrote:
we have to write a vxd for win9x/me and filesystem driver for ntbased systems(emphasis added)

OK, that concludes it. You *are* stuck between a rock and a hard place. You will have to learn Win9x VxD programming. You will have to learn NT kernel mode programming. You will have to learn filesystem filter drivers, the subtle but often crashing (BSOD-style) difference in the driver model between e.g. NT4 and NT5, the addition of IRP_Xxxx "messages", the addition of ... if you are unlucky even the added power management in NT5+. Just to mention a few of the problems you are facing.

I wish you luck. This is an effort I'd myself feel as a refreshing challenge to undertake! Smile | :)

If I knew less than I do, I'd really recommend the (AFAIK) only commercial entity that *do* know these things and can provide both help and education: OSR. Please note I know close to nothing about that company and have no interests in it - it just happens to be the only entity I know about that actually *can* provide help in these areas.

Again: ++luck;

/Mike

rect on top of the Text

spicy_kid200014-Jul-03 17:35

spicy_kid2000

14-Jul-03 17:35

hi ,

am trying to Draw a rect on top of the text. It is not working . pls see the code

CFont font;
CSize sz;
CBrush gBrush = RGB(10,255,10);
CBrush bBrush = RGB(0,0,0);

CString str=_T("HELLO WORLD");

VERIFY(font.CreateFont(
25, // nHeight
0, // nWidth
0, // nEscapement
0, // nOrientation
FW_NORMAL, // nWeight
FALSE, // bItalic
FALSE, // bUnderline
0, // cStrikeOut
ANSI_CHARSET, // nCharSet
OUT_DEFAULT_PRECIS, // nOutPrecision
CLIP_DEFAULT_PRECIS, // nClipPrecision
DEFAULT_QUALITY, // nQuality
DEFAULT_PITCH | FF_SWISS, // nPitchAndFamily
"Arial Narrow")); // lpszFacename

pDC ->SelectObject(font);
pDC->SelectObject(bBrush);

pDC->TextOut(5, 5, str);

pDC->SelectObject(gBrush);

sz = pDC->GetTextExtent(str);
pDC->Rectangle(5,5,sz.cx+5,sz.cy+5);

Re: rect on top of the Text

Dave Bryant14-Jul-03 17:46

Dave Bryant

14-Jul-03 17:46

CDC::Rectangle() uses the current pen, not a brush. Create a new pen first, select it into the DC, and then try drawing it.

Dave
http://www.cloudsofheaven.org

not working

spicy_kid200014-Jul-03 17:54

spicy_kid2000

14-Jul-03 17:54

hi Thanks for the reply...I tried that way also, pls see the code, but not working.

Thanks very much

CFont font,font2;
CSize sz;
int x1=0,y1=0,x2=0,y2=0;
CString str=_T("HELLO WORLD");
VERIFY(font.CreateFont(
25, // nHeight
0, // nWidth
0, // nEscapement
0, // nOrientation
FW_NORMAL, // nWeight
FALSE, // bItalic
FALSE, // bUnderline
0, // cStrikeOut
ANSI_CHARSET, // nCharSet
OUT_DEFAULT_PRECIS, // nOutPrecision
CLIP_DEFAULT_PRECIS, // nClipPrecision
DEFAULT_QUALITY, // nQuality
DEFAULT_PITCH | FF_SWISS, // nPitchAndFamily
"Arial Narrow")); // lpszFacename

pDC ->SelectObject(font);

sz = pDC->GetTextExtent(str);

CPen myPen(PS_SOLID,1,RGB(10,255,10));

pDC->SelectObject(&myPen);

pDC->TextOut(5, 5, str);

pDC->Rectangle(5,5,sz.cx+5,sz.cy+5);

Re: not working

Dave Bryant14-Jul-03 18:02

Dave Bryant

14-Jul-03 18:02

1) What is the value of sz? Is it returning a valid size?

2) What is Rectangle() returning? It should return TRUE if successful.

Dave
http://www.cloudsofheaven.org

Re: rect on top of the Text

PJ Arends14-Jul-03 18:01

PJ Arends

14-Jul-03 18:01

actually, CDC::Rectangle() does use the current brush for filling the rectangle. It uses the current pen only to draw the rectangle's edges.

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: rect on top of the Text

PJ Arends14-Jul-03 18:09

PJ Arends

14-Jul-03 18:09

I copied your code into my app, and it worked perfectly. It drew a green rectangle over the text.

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: rect on top of the Text

spicy_kid200014-Jul-03 18:18

spicy_kid2000

14-Jul-03 18:18

fo me only a green rect is coming

but no text

rect and all giving me return value success

Re: rect on top of the Text

PJ Arends14-Jul-03 18:30

PJ Arends

14-Jul-03 18:30

That is because the rectangle is over the text;) (ie. The text is behind the rectangle) If you shift the rectangle over a little, you will see the text behind it.

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Inline Assembler Macros?

Aidman14-Jul-03 16:37

Aidman

14-Jul-03 16:37

Hi, all

I am trying to write a high performance library by using inline assembler, but I have encountered a irritating problem. It seems that VC++ refuses to accept multi-instructions within the inline asm section for the macro. For example, I can write a inline assembler macro with the single instruction “mov eax, 0” but that’s it, VC++ refuses to accept anymore instructions. The following code might give a better understanding.

#define TestMacro1(x) _asm{ mov eax, 0 } // This works<br />
#define TestMacro2(x) _asm{ mov eax, 0; mov ebx, 0 } // This doesn’t

So what I am trying to do here is to add more then one instruction into the macro, but I don’t know how. Any ideas on how to solve this are highly appreciated.

Thanks in advance.
Aidman » over and out

Re: Inline Assembler Macros?

PJ Arends14-Jul-03 17:39

PJ Arends

14-Jul-03 17:39

just a guess, untested

#define testmacro(x) _asm mov eax, 0 _asm mov ebx, 0

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/html/_langref___asm.asp[^]

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: Inline Assembler Macros?

Aidman14-Jul-03 22:36

Aidman

14-Jul-03 22:36

Thank you

I am most grateful

Aidman » over and out

Re: Inline Assembler Macros?

Toni7814-Jul-03 19:22

Toni78

14-Jul-03 19:22

My untested guess would be

#define TestMacro2(x) _asm{ mov eax, 0 \
                            mov ebx, 0 }

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

When one cannot invent, one must at least improve (in bed).-My latest fortune cookie

Re: Inline Assembler Macros?

Aidman14-Jul-03 22:56

Aidman

14-Jul-03 22:56

When I try to compile this:

#define TestMacro2(x) _asm{ mov eax, 0 \
                            mov ebx, 0 }

int main() {
	TestMacro2(0);
	return 0;
}

I get the following error and warning with VC++:

warning C4405: 'mov' : identifier is reserved word<br />
error C2400: inline assembler syntax error in 'second operand'; found 'register'

Thanks anyway Smile | :)

Aidman » over and out

Re: Inline Assembler Macros?

Toni7814-Jul-03 23:39

Toni78

14-Jul-03 23:39

I am sorry Aidman that it didn't work. It was just a suggestion that I didn't test, because I was in a hurry.

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

When one cannot invent, one must at least improve (in bed).-My latest fortune cookie

Re: Inline Assembler Macros?

Ryan Binns14-Jul-03 23:18

Ryan Binns

14-Jul-03 23:18

Nope. Won't work. The '\' at the end of the line will cause the two lines to be concatenated, effectively becoming

#define TestMacro2(x) _asm{ mov eax, 0 mov ebx, 0 }

You'll have to use PJ's solution to get the result he's after.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Inline Assembler Macros?

Toni7814-Jul-03 23:36

Toni78

14-Jul-03 23:36

It was a shot in the dark. In assembly there are no line delimiters such as ; (I am sure you know this), while PJ's solution seemed to work I thought he could give it a try with my idea. Obviously, it doesn't work. Big Grin | :-D

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

When one cannot invent, one must at least improve (in bed).-My latest fortune cookie

Re: Inline Assembler Macros?

Ryan Binns15-Jul-03 0:48

Ryan Binns

15-Jul-03 0:48

The __asm is its own separator, so __asm mov ax,0 __asm mov bx,0 is perfectly valid code.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

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