C# Discussion Boards - CodeProject

TheGreatAndPowerfulOz21-Feb-08 8:26

21-Feb-08 8:26

geekfromindia wrote:
composition here

yes

class Name
{
    string First;
    string Middle;
    string Last;
};

class Employee
{
    Name Name;
    int Age;
};

class Company
{
    string Name;
    List<Employee>
}

Silence is the voice of complicity.

Strange women lying in ponds distributing swords is no basis for a system of government. -- monty python

Might I suggest that the universe was always the size of the cosmos. It is just that at one point the cosmos was the size of a marble. -- Colin Angus Mackay

geekfromindia21-Feb-08 8:52

geekfromindia

21-Feb-08 8:52

ahhz wrote:
class Company{ string Name; List<employee>}

I am using 1.1 here so Name and Employee will be classes instead of string or generic list.

maybe something like

class Company<br />
{<br />
	Employee objEmployee;<br />
	Name objName;<br />
}

but i m still not sure how it can be initilialized with multiple employees?
Property with Employee Array?? Confused | :confused:

Keep DotNetting!!

GeekFromIndia

TheGreatAndPowerfulOz21-Feb-08 9:18

21-Feb-08 9:18

class Company
{
    string Name; // string is part of .Net 0.0
    Employee[] employeList;
}

Very weird kernel32 memory reading results.

Not Active21-Feb-08 9:22

Not Active

21-Feb-08 9:22

public class Person<br />
{<br />
   string m_Name;<br />
   int m_Age;<br />
}<br />
<br />
public class Company<br />
{<br />
   string m_Name;<br />
   [XmlArray(ElementName="Employee", Namesapce="...")]<br />
   Person[] m_Persons;<br />
}

only two letters away from being an asset

Jitse21-Feb-08 7:05

Jitse

21-Feb-08 7:05

I'm making a memory reading application, but after some programming I noticed I actually get the same result for no matter which process. WTF | :WTF:

I'll give a very clear example of my problem. This piece of code opens three processes, and reads their memory at position 0x0000FFFF. The processes can be whatever I want (as long as they're running, obviously), but for this example I took Firefox, TeaTimer (background process of Spybot) and Nexcal (a calculator program).

<br />
        public static void Test()<br />
        {<br />
            IntPtr bytesRead = new IntPtr();<br />
<br />
            // firefox<br />
            IntPtr firefox = OpenProcess(PROCESS_ALL_ACCESS, 0, (uint)Process.GetProcessesByName("firefox")[0].Id);<br />
            byte[] firefoxBuffer = new byte[3];<br />
            Trace.WriteLine("Firefox reading success: " + ReadProcessMemory(firefox, new IntPtr(65536), firefoxBuffer, (uint)3, out bytesRead));<br />
            foreach (byte b in firefoxBuffer)<br />
            {<br />
                Trace.WriteLine(b.ToString());<br />
            }<br />
            CloseHandle(firefox);<br />
<br />
            // teatimer<br />
            IntPtr tea = OpenProcess(PROCESS_ALL_ACCESS, 0, (uint)Process.GetProcessesByName("TeaTimer")[0].Id);<br />
            byte[] teaBuffer = new byte[3];<br />
            Trace.WriteLine("TeaTimer reading success: " + ReadProcessMemory(tea, new IntPtr(65536), teaBuffer, (uint)3, out bytesRead));<br />
            foreach (byte b in teaBuffer)<br />
            {<br />
                Trace.WriteLine(b.ToString());<br />
            }<br />
            CloseHandle(tea);<br />
<br />
            // nexcal<br />
            IntPtr nex = OpenProcess(PROCESS_ALL_ACCESS, 0, (uint)Process.GetProcessesByName("Nexcal")[0].Id);<br />
            byte[] nexBuffer = new byte[3];<br />
            Trace.WriteLine("Nexcal reading success: " + ReadProcessMemory(nex, new IntPtr(65536), nexBuffer, (uint)3, out bytesRead));<br />
            foreach (byte b in nexBuffer)<br />
            {<br />
                Trace.WriteLine(b.ToString());<br />
            }<br />
            CloseHandle(nex);<br />
        }<br />

Now here's the output of this code:

Firefox reading success: 1
61
0
58
TeaTimer reading success: 1
61
0
58
Nexcal reading success: 1
61
0
58

I even used different buffers just so I won't make a mistake with accidentally just printing the previous result again. Anyways, it explicitly says it succeeded reading that certain process at that certain position of their memory, but it still returns exactly the same result for the three processes. Now I was thinking this might be an absolute memory location I'm reading. But that wouldn't explain why I'd have to pass a process handle to the kernel32 functions. And it would make it all very complicated and quite useless.

Re: Very weird kernel32 memory reading results.

TheGreatAndPowerfulOz21-Feb-08 8:44

Re: Very weird kernel32 memory reading results.

21-Feb-08 8:44

look here: http://www.codeproject.com/KB/trace/minememoryreader.aspx[^]

Jitse21-Feb-08 10:03

Jitse

21-Feb-08 10:03

I tried the example you gave, and it gives exactly the same result as my code. Hehehe, it seems my code was just totally perfect. Apparently many processes in Windows have certain pieces of their allocated memory identically. Is it some Windows-header or so? Anyway, I tried some other more unusual processes, like winlogon.exe (some Windows process), and he just gives something else. And I also tried some other memory positions alot further than 0xFFFF, like 0x20083, and that gives results different from process to process.

Just got unlucky to try the wrong processes at the wrong places.

Edit: I suddenly notice I actually succeeded reading the memory of a windows process (winlogon.exe), it didn't work after I tried it again... WTF | :WTF:

Email application

N4D33M21-Feb-08 6:28

N4D33M

21-Feb-08 6:28

Hi,
I need to create a simple e-mail application with basic functionality using C#. I dont want the source code but i would really appreciate if anyone could guide me as to what i should do...

Thanx,
Nadeem.
P.S: Im a comlete n00b in C#. Frown | :(

TheGreatAndPowerfulOz21-Feb-08 7:01

21-Feb-08 7:01

look at the open source ThunderBird project.

N4D33M21-Feb-08 8:16

N4D33M

21-Feb-08 8:16

I dont think u got me .... im a n00b . if i could go through the code of thuderbird, i wouldnt have been here Smile | :)

and i dont think Thunderbird has been developed using purely C# ....

Thanx anyway 4 ur time...
N.

TheGreatAndPowerfulOz21-Feb-08 8:22

21-Feb-08 8:22

if you're a n00b, then it doesn't really matter which language you use to learn the ideas. they can be applied in any language.

And, that's how I learned: by studying code other excellent programmers wrote (don't personally know if that really applies to thunderbird code).

programming is programming regardless of language used. what you learn can be applied to C#.

There is the System.Net.Mail namespace that has a lot of stuff in it that you'd need.

Why not get started trying something and then ask more appropriate, *small-scope* questions.

First break down the problem into smaller pieces. Then break those pieces into even smaller pieces and repeat until you get something that you can do in a few steps. accomplish all those smallest pieces, and you will have solved the larger ones.

Christian Graus21-Feb-08 10:52

Christian Graus

21-Feb-08 10:52

Why do you need to create a mail program ? There's plenty out there.

N4D33M wrote:
Im a comlete n00b in C#.

Then if this is a job you've accepted, you should let them know it is beyond you. If it's a personal project, start with something more within your reach. Most people who give up on programming, do so because they didn't set themselves reasonable goals. They expected to start big, instead of learning at a reasonable pace.