C / C++ / MFC

4-Feb-03 4:23

When you're at your first breakpoint, go to Debug/Exceptions. Scroll down to the last exception, select it, and click on "Stop always", then OK. This tells the debugger to break when the app throws a C++ exception (which is what a first chance exception is). Continue on to the next breakpoint and the debugger should stop as soon as the exception occurs.

You can also do this for other types of exception, such as Access Violations and Stack Overflows.

Regards,
Alvaro

All you need in this life is ignorance and confidence, and then success is sure. -- Mark Twain

terrific advice!

ns4-Feb-03 7:32

4-Feb-03 7:32

I did what you said, and though it stopped in diassembly (or is it assembly? Confused | :confused:

, I looked at the call stack and figured out the problem. It was soooo instructive. I thank you!!!

Appreciate your help,
ns

Re: terrific advice!

Alvaro Mendez4-Feb-03 8:25

4-Feb-03 8:25

Thanks for your appreciation. Smile | :)

Regards,
Alvaro

All you need in this life is ignorance and confidence, and then success is sure. -- Mark Twain

Bit Masking

Nitron4-Feb-03 3:59

4-Feb-03 3:59

How do I use "bit masking" to set individual bits in a word?

i.e. if I have:

0x00F0 = 0000 0000 1111 0000

and I want:

0000 0010 1111 0000 = 0x02F0
       -
       |- set only bit 9

What is the trick?

Thanx!

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

HENDRIK R4-Feb-03 4:08

HENDRIK R

4-Feb-03 4:08

One possiblility:

WORD w = 0x00F0 | 0x0200;
Thus all you want to keep is set to 0, the rest gets an 1.

If you want to clear bits instead of setting them, use the & operator instead of the | and set everything to 0 you want to get cleared.

RChin4-Feb-03 4:14

RChin

4-Feb-03 4:14

To set particular sets of bits of data, you need to OR it to the target. So, in your example to set bit 9 = 0x200, you need to OR this with 0xF0:
0x200 OR 0xF0 = 0x2F0.

have a look at the excellent article:
http://www.codeproject.com/cpp/bitbashing.asp[^]

for more info.

Nitron4-Feb-03 4:20

4-Feb-03 4:20

RChin wrote:
have a look at the excellent article:
http://www.codeproject.com/cpp/bitbashing.asp[^]

Rose | [Rose]

Ahh yes... just what the doctor ordered! Big Grin | :-D

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

Brian Delahunty4-Feb-03 6:26

Brian Delahunty

4-Feb-03 6:26

Nitron wrote:
just what the doctor ordered!

A Doctor ordered you to learn about bit masking WTF | :WTF:

Regards,
Brian Dela Smile | :)

Run naked in the snow until you're sweating like a stuck pig and can't seem to catch your breath. When the flu becomes pneumonia, they can cure that with a shot. - Roger Wright

Nitron4-Feb-03 6:34

4-Feb-03 6:34

Brian Delahunty wrote:
A Doctor ordered you to learn about bit masking

um... Are you telling me your's hasn't?!?! OMG | :OMG:

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

Alvaro Mendez4-Feb-03 4:15

4-Feb-03 4:15

The usual way is to do a bitwise "OR" of just the bit you want to set, which is 0x0200:

short result = 0x00F0 | 0x0200;

Notice that in this case "or"ing the values is equivalent to adding them together:

  Binary                 Hex       Dec
---------------------------------------
  0000 0000 1111 0000    0x00F0    240
+ 0000 0010 0000 0000    0x0200    512
= 0000 0010 1111 0000    0x02F0    752

Then to check if the bit is set, you do a bitwise "AND":

bool bitIsSet = (result & 0x0200) != 0;

Regards,
Alvaro

All you need in this life is ignorance and confidence, and then success is sure. -- Mark Twain

* THANKS *

Nitron4-Feb-03 4:22

CDC::GetTextExtent() and CWnd::GetClientRect()

4-Feb-03 4:22

thanks all! I figured it must be easy to do... Roll eyes | :rolleyes:

I don't get to deal with it all that often, and I usually find myself doing it by hand! Dead | X|

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

Martyn Pearson4-Feb-03 3:36

Martyn Pearson

4-Feb-03 3:36

Hi
Quick question - am I comparing like for like if I do the following in a CEdit derived class? I am trying to determine whether or not the text will be completely visible when placed in the edit control. This code indicates that the text will not be completely visible, even though it quite clearly is!

void CMyEdit::DoSomething(const CString & strText)<br />
{<br />
   CRect rectText;<br />
   GetClientRect(rectText);<br />
<br />
   CDC * pDC = GetDC();<br />
 <br />
   CSize sizeExtent = pDC->GetTextExtent(strText);<br />
<br />
   if (sizeExtent.cx > rectText.Width())  // Is this valid?<br />
   {<br />
      // Text too large<br />
   }<br />
<br />
   ReleaseDC(pDC);<br />
}

Thanks in advance!

Re: CDC::GetTextExtent() and CWnd::GetClientRect()

Alvaro Mendez4-Feb-03 3:57

Re: CDC::GetTextExtent() and CWnd::GetClientRect()

4-Feb-03 3:57

I just did a quick lookup on the GetTextExtent function and noticed that there's another one called GetOutputTextExtent, which may be the one you need.

Regards,
Alvaro

All you need in this life is ignorance and confidence, and then success is sure. -- Mark Twain

Roger Allen4-Feb-03 3:58

Roger Allen

4-Feb-03 3:58

When you call GetDC() you get a DC with a default font in it. This will (most probably) not be the font being used by the edit control. You need to use that font when measuring your text. Check the result of a call to CEdit::GetFont().

Roger Allen
Sonork 100.10016

WHats brown and sticky?
A stick or some smelly stuff!

Re: CDC::GetTextExtent() and CWnd::GetClientRect()

Martyn Pearson4-Feb-03 4:30

Martyn Pearson

4-Feb-03 4:30

Thanks for that - calling CEdit::GetFont() and passing the result to CDC::SelectObject() before doing the comparison worked a treat!

Popup window does not pop

Mitchellj4-Feb-03 3:21

Mitchellj

4-Feb-03 3:21

I am a rookie in the MFC game , and am having some awful problems in creating a Popup window. From the parent windows OnCreate i try to create the popupwindow with createEx(...). Have tried all combinations (also excluding WS_CHILD) but nothing seems to work. I receive an assert error upon launch. If I keep the window simple (WS_CHILD), no problemo. I cannot seem to find any documentation on the subject. Can anyone HELP ME.
Thanks

Re: Popup window does not pop

Abbas_Riazi4-Feb-03 3:24

Abbas_Riazi

4-Feb-03 3:24

Can you say what is your assertion failor? which source file and line?
A. Riazi

migrate a program to other OS

includeh104-Feb-03 3:08

includeh10

4-Feb-03 3:08

we need to migrate a huge project overseas - or to other OS.

the project works fine on pure english OS, but crashes on other OS which use different languages, i.e. Italian and Chinese windows.

we don't need to modify the project at all because people there know english - but it crashes there.

it is too hard to find why in the moment.

any experience, hint or comment to fix the problem is useful, thx in advance.

includeh10

jhwurmbach4-Feb-03 3:26

jhwurmbach

4-Feb-03 3:26

Well, is it just not starting, or do you need to do something special, like entering a special character etc?

All of my programs, developed with english OS wrk great on german windows. they even tolerate the umlauts.

My opinions may have changed, but not the fact that I am right.

Abbas_Riazi4-Feb-03 3:30

Abbas_Riazi

4-Feb-03 3:30

Is your project use OS resources (any strings, bitmaps, icons, ...)?
A. Riazi

includeh104-Feb-03 4:02

includeh10

4-Feb-03 4:02

yes, many.
bitmap, menu (which uses string), icon ...
is this possible reason?

includeh10