C / C++ / MFC

toxcct26-Sep-06 5:23

toxcct

26-Sep-06 5:23

delete from where ?

TOXCCT >>> GEII power

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David Crow26-Sep-06 5:33

26-Sep-06 5:33

toxcct wrote:
delete from where ?

The desktop.

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

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

toxcct26-Sep-06 5:34

toxcct

26-Sep-06 5:34

deleting the desktop shortcut from the desktop ?

i think one of us didn't get the question... Laugh | :laugh:

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

David Crow26-Sep-06 5:41

backward debugging in Visual Studio??

26-Sep-06 5:41

toxcct wrote:
i think one of us didn't get the question...

It's an English thing. In his question, desktop is an adjective, describing the type of shortcut. It would have been the same as, "How can we programmatically remove a shortcut icon from the desktop?"

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

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

George_George26-Sep-06 3:50

26-Sep-06 3:50

Hello everyone,

Suppose a program looks like,

--------------------
code block 1;

if (condition == true)
{
code block 2;
}
--------------------

I want to see the state of block 1 (variable values) if condition is true. So I am wondering whether Visual Studio supports backward debugging, if it supports, I could set a breakpoint at the beginning of code block 2, and if it is executed, I could run *back* to the beginning of code block 1 to execute code block 1 again see the detailed running process of code block 1.

thanks in advance,
George

Zac Howland26-Sep-06 4:08

26-Sep-06 4:08

You can set the execution pointer to anywhere you want, but you have to be careful with this because it can make your code behave rather strangely sometimes.

If you just want to see the variables from code block 1, just use the watch window.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

George_George26-Sep-06 19:39

26-Sep-06 19:39

Thank you Zac!

I would like to know your comments/advices for my issues below. I have described it in more details.

But in my situation, it is hard to know the condition before an error occurs ... means the condisiton is not predictable and there is not a fixed a rule for defining conditions. The only point where I can find errors is, the execution of code block 2.

In more details, I want to monitor the original values, which will incur the error. For example, code block 1 will be executed a lot of times and code block 2 will only be executed when there are some errors. I want to set a breakpoint to the beginning of code block 2 and find the states of variables in code block 1 when there are errors. I can not set a break point to the beginning of code block 1 since it will be executed a lot of times even if there are no errors ...

regards,
George

Zac Howland27-Sep-06 3:53

27-Sep-06 3:53

Set a breakpoint at the start of code block 2. Run your application in debug mode. When you reach the breakpoint, use the watch window to look at the variables you need to see (as long as they are in scope). Now, if this is part of a catch block, make sure your variables are declared outside the try block so that you will be able to see them.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

George_George27-Sep-06 17:42

27-Sep-06 17:42

Hi Zac,

In code block 1, there are some function invocations, which has some local variables in function stack, such variables can not be monitored outside when returned back to code block 1/2. Any ideas?

regards,
George

Zac Howland28-Sep-06 3:32

28-Sep-06 3:32

Several. You can set a conditional breakpoint on any of those local variables you want to watch. Or you could add some variables to the scope outside of those calls to just store the values of those variables for debugging purposes. Additionally, you could always add code to output important data to a file as it goes through your code.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

George_George28-Sep-06 3:55

28-Sep-06 3:55

Thank you Zac,

The idea of setting a conditional break point is not feasible for me, becasue the value of variable which will cause error is not predictable (image some mathematics operations ...).

So, I have to write some additional code to some place, a file or the console. But actually, I do not want to add them since I am debugging some race conditions in a multiple threaded application, and I concern that if I add some additional debug code, the race condition will not occur. And, I only release application without debug code ... I mean I want to test the application the same as the one I will release (without debug code).

Any comments or good points to solve this?

regards,
George

Zac Howland28-Sep-06 4:39

28-Sep-06 4:39

George_George wrote:
The idea of setting a conditional break point is not feasible for me, becasue the value of variable which will cause error is not predictable

But you do know the valid values for such a variable I take it?

George_George wrote:
So, I have to write some additional code to some place, a file or the console. But actually, I do not want to add them since I am debugging some race conditions in a multiple threaded application, and I concern that if I add some additional debug code, the race condition will not occur. And, I only release application without debug code ... I mean I want to test the application the same as the one I will release (without debug code).

You may not want to, but you may have to in order to find your bug. You can test your release builds all you want, but if you are not able to find the cause of your bug, you need to start gathering more information. If the race condition does not occur when you add output information, at least you would have tried -- and if it does still occur, you would have more information about where it might be. Debugging is largely trial and error.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

George_George28-Sep-06 22:03

28-Sep-06 22:03

Thank you Zac,

Zac Howland wrote:
But you do know the valid values for such a variable I take it?

I mean in some situation, the value 100 for variable foo is correct (not causing errors) in a complex system, but later, the value 100 for variable 100 is in-correct (causing errors). It is highly dependent on other threads running at the same time. Have I made myself understood? Smile | :)

Any ideas?

regards,
George

Zac Howland29-Sep-06 3:51

29-Sep-06 3:51

George_George wrote:
I mean in some situation, the value 100 for variable foo is correct (not causing errors) in a complex system, but later, the value 100 for variable 100 is in-correct (causing errors). It is highly dependent on other threads running at the same time. Have I made myself understood?

I think I understand your problem, but there is no real easy way to debug it.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

George_George29-Sep-06 18:59

BHO cpu usage is too high

29-Sep-06 18:59

Thank you Zac,

Do you mean the best solution I could use is to debug some codes to manually dump the values of the variables I am interested to somewhere, and to monitor/analyze them later when error occurs?

regards,
George

AdRotator

sandeep chowdary26-Sep-06 3:14

sandeep chowdary

26-Sep-06 3:14

how to bind data from database to adrotator control in .NET. and need code for horizontal sliding.

Please help me in this...

Thanks & Regards

Sandeep.k
.NET Programmer

sandeep chowdary.k

daheitou26-Sep-06 3:02

daheitou

26-Sep-06 3:02

hi, all:
I've developed a bho plugin for internet explorer. It simply receive the DISPID_BEFORENAVIGATE2 event and change the address in the address bar. It's event-driven and I think it will not cost too much cpu. But to my surprise when it's loaded into IE, the cpu usage turns to be 100% and I can do nothing else.

Why it costs so much cpu and how to resolve this problem?

Thank you very much!

harald

diff between C++ and VC++

Krishnatv26-Sep-06 2:54

Krishnatv

26-Sep-06 2:54

what is the Difference between C++ and VC++ ?

David Crow26-Sep-06 2:56

26-Sep-06 2:56

This has been asked several times before. In short, VC++ is Microsoft's version of the C++ language.

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

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

Krishnatv26-Sep-06 3:04

Krishnatv

26-Sep-06 3:04

Then can u give me links of it

David Crow26-Sep-06 3:13

26-Sep-06 3:13

See here.

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

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