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I suppose you can check the index into the string, and the size of the string, which was allocated, so that the index should be less than the size, and always greater or equal to zero.
You can use:
AfxIsValidString(...)<br />
AfxIsValidAddress(...)
to check that the address is readable/writable.
this is this.
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don't make the confusion : char* is not always a string !!!
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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I want to add my own printer dialog setupt in the list of supported printer drivers , sort of virtual printer driver not doing actually printing , or simply i want to extend office printer dialog
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Hi all,
I wanna write a program that can monitor and discover any change of file in windows sytem and notify the change to user. where should i begin and what should i read ?
Thanks,
ken
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I think ReadDirectoryChangesW(...) should do.
It can watch a directory for changes.
There are a few resources (articles) here on CP that implement this function.
this is this.
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Hi.I'm seeking for help on my recent project.Actually, i'm developing a program that embeds several network analysis tools into single program.That is, once the user clicks on button "Tool 1", the .exe file of the tool will be called and it will run the tool.The problem now is, i don't know how to link the button with the corresponding file.Please help me.
-- modified at 3:03 Saturday 19th November, 2005
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In the Click event of the button, use:
ShellExecute(NULL,"open",path_to_exe_file,NULL,NULL,SW_SHOWNORMAL);
Just replace path_to_exe_file with the physical path of the other exe.
this is this.
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Thanks.I'll try.
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Hi,
I need info about the WaitThreadFunc. All I know now is the function prototype =>
unsigned int __stdcall WaitThreadFunc(void * _param);
How does this function work? 
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Looks like a callback function.
If it is, then you need to implement it yourself and give the its name to the function that uses it.
this is this.
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Hi,
I've developed an application where i'm readng some data from a file before the main window is created ,so accordingly i've placed the code in a class derived from CWinApp.When i compile and run the program itz doing well and i'm getting the desired output,But the problem starts when i click the EXE icon in the debug folder .
Itz giving out an error that the specified file could not be opened.Then i used FormatMessage to see what the error was and it says "The System Cannot Find The File Specified".How do i rectify this error?.It would be really great if someone can help me out in this.Thanks in advance.
rajeev
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The file you are trying to open is located someplace else. You need to use the exact physical path of the file. You can use:
char szPath[MAX_PATH];<br />
GetModuleFileName(NULL,szPath,MAX_PATH);
It will return the path of this exe like: "c:\asd\debug\asd.exe"
And parse the returned string to remove the characters after the last backslash. Then append the name of the file you want to open.
this is this.
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Hello, everyone,
Who know the different between C Struct and C++ Struct?
Please tell me?
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In C a structure is a colection of data items only.
In C++ a structure is the same as a class, accept that the default access is public instead of private.
INTP
Every thing is relative...
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DEAR SIR
can you give a example
I donot understand your say
----------------------------
Jerry yu
Chinese
programming fans
我的QQ 290785513
中国人的加我
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in C++ :
<font color=green>
<font color=blue>struct</font> MyStruct {
<font color=blue>int</font> i;
<font color=blue>double</font> d;
};
will actually be seen by the compiler as the following code :
<font color=blue>class</font> MyStruct {
<font color=blue>public</font>:
<font color=blue>int</font> i;
<font color=blue>double</font> d;
<font color=blue>public</font>:
MyStruct() { }
<font color=blue>virtual</font> ~MyStruct() { }
};
see if you can find any differences...
in the same way, the following code wont compile with a pure C compiler :
<font color=blue>struct</font> Formula1 : <font color=blue>public</font> SportCar { <font color=green>
<font color=blue>private</font>: <font color=green>
Motor m;
<font color=blue>double</font> max_speed;
<font color=blue>public</font>:
<font color=blue>double</font> getMaxSpeed(); <font color=green>
};
TOXCCT >>> GEII power
[toxcct][VisualCalc]
-- modified at 7:05 Saturday 19th November, 2005
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guy .From your name I know you come from cn
两种结构体式一样的把
----------------------------
Jerry yu
Chinese
programming fans
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in addition to what John said, a C++ structure can accept the following by opposition to C structs :
- visibility operators (public, protected, private)
- member functions
- inherit from another type
a C structure is so only an aggregation of several types, all public.
a C++ struct do is a class, but which members are public by default...
if you don't understand more, search for a C++ book and learn about the language.
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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Hello,
A struct in C++ is the same as C. It's only there for compatibility with C. There is no real difference. When you use C++, you can add member functions and all the other stuff that you can use with a class. I can only advice not too do it. The main reason for this is that everybody uses a struct as a POD (Plain Old Datatype) and a class for dynamic objects.
Behind every great black man...
... is the police. - Conspiracy brother
Blog[^]
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Thank you very much. I find the real reason from your answer.
Yesterday, I read a block source code of C++. In it, I found some
structs are defined as C style, I feel very strange, So I ask this
question.
Now I understood it only want to treat the struct as a Datatype.
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chenxiujie wrote: Thank you very much.
You're welcome! 
Glad that you found my help usefull. 
Behind every great black man...
... is the police. - Conspiracy brother
Blog[^]
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Hi,
On the end user machine I want to determine if the user has admin privileges available or he is a normal user. What is the right way of finding this out?
thanks!
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You're better off determining exactly what priviledges/access rights you need, and testing for those specifically.
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