C / C++ / MFC

18-Oct-04 5:57

The problem you have is that GetDlgItem does not take a string as a parameter.

When you write

GetDlgItem(IDC_BUTTON1)->SetWindowtext("");

The compiler replaces the define IDC_BUTTON1 with its numeric value (see resource.h)

What would work is

int myID;
myID = IDC_BUTTON1;
GetDlgItem(myID)->SetWindowText("");

Unless I have misunderstood your problem.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

creating a package

nnvidya18-Oct-04 3:23

nnvidya

18-Oct-04 3:23

i am using installshield for microsoft vc++ 6.0 for my installation wizard.
I am unable to create a package, so that there will be a single setup.exe which can be used to install it.
Please let me know how to do this?

vidya

Re: creating a package

shiraztk18-Oct-04 19:13

shiraztk

18-Oct-04 19:13

Hi
I dont have answer to your question you could use Install Shield forum for more help

http://community.installshield.com/[^]

Regards

The Best Relligion is Science.
Once you understand it, you will know God.

Re: creating a package

nnvidya18-Oct-04 19:43

nnvidya

18-Oct-04 19:43

I have submitted the query in the install shield forum...
but no replies.....
creating a package in install express is easy.......
but i could do it in installshield for microsoft VC++6.0
Is there any script i need to write for that?

vidya

SetWindowText

jj92118-Oct-04 3:01

jj921

18-Oct-04 3:01

Just starting out,

Problem is that when I read a button name from a text file and
assign it using a control variable and the setwindowtext function, i seem to
get an extra character printed on the button.

I am using fgets to read a string from a text file.

Any help will be gratefully accepted.

Phil

David Crow18-Oct-04 3:02

David Crow

18-Oct-04 3:02

It sounds like the string also contains the newline character.

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

jj92118-Oct-04 5:37

jj921

18-Oct-04 5:37

So whats the easy way to get rid of this?

David Crow18-Oct-04 5:46

David Crow

18-Oct-04 5:46

Replace it with a '\0' character.

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Vikram Kashyap19-Oct-04 2:49

Vikram Kashyap

19-Oct-04 2:49

Fetch the content in a CString type variable and then use the TrimRight() function with no parameters. When used with no parameters, TrimRight removes trailing newline, space, and tab characters from the string.

Vikram Kashyap
"You will never fail until you stop trying"

Vikram Kashyap19-Oct-04 2:50

Vikram Kashyap

19-Oct-04 2:50

story of winzip

includeh1018-Oct-04 2:04

includeh10

18-Oct-04 2:04

winzip setup is a single program with exe extenstion, such as winzip80.exe.
But it is a zipped file also - we can use winzip to unzip the exe file.

the exe file is also self-executable - we can run it by double click it.

OK, I want to create a file similar to the exe file programmatically:
1) with exe as extension
2) contains multiple file inside (a zipped file) and can be unzipped by winzip.
3) self-executable by double click it.

do you have idea to implement the file?

thx

includeh10

Re: story of winzip

22491718-Oct-04 2:21

224917

18-Oct-04 2:21

http://www.codeproject.com/win32/selfextract.asp

There is no spoon.

mail

Re: story of winzip

includeh1018-Oct-04 3:29

includeh10

18-Oct-04 3:29

Hi,
thanks, it looks very good, but...
I have simply tested the program as following:
1) put several files in source folder, one of them is an exe file: try.exe
2) name an output file: my.exe (the file doesn't exist)
3) select try.exe as auto-execute program

then click Action menu: "build self-execute program"
an error message appears:
"Fail to update the resource table of the self-extract executable file!"

do you know what problem it is?
(I didn't read code)

thanks

includeh10

Re: story of winzip

includeh1018-Oct-04 3:56

includeh10

18-Oct-04 3:56

I know why: I use win98 (My users even use win95).
UpdateResource function is for NT/2K only.

problem!

includeh10

++ operator atomic?

PeterHarrie18-Oct-04 1:53

PeterHarrie

18-Oct-04 1:53

Hi,

I am currently having a discussion at work.

If I have the following code:

int m_nNumber = 0;<br />
void Increase()<br />
{<br />
    m_nNumber++;<br />
}

Is this code threadsafe or should it be:

CCriticalSection m_cProtect;<br />
int m_nNumber = 0;<br />
void Increase()<br />
{<br />
    m_cProtect.Lock();<br />
    m_nNumber++;<br />
    m_cProtect.Unlock();<br />
}

In other words, will the ++ operator be called atomic (in one clockcycle).
Hope someone can help me.

Regards,
Peter.

Re: ++ operator atomic?

Hans Ruck18-Oct-04 2:05

Hans Ruck

18-Oct-04 2:05

++ is not an atomic operator. See InterlockedIncrement in MSDN.

"though nothing
will keep us together
we can beat them
for ever and ever"

rechi

Re: ++ operator atomic?

Antony M Kancidrowski18-Oct-04 2:07

18-Oct-04 2:07

Agreed, Good point.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

Re: ++ operator atomic?

Antony M Kancidrowski18-Oct-04 2:06

"const" statement causes errors

18-Oct-04 2:06

Simply no the code is not thread safe. Using critical section will work just fine. Although I would write it a little differently.

CCriticalSection m_cProtect;<br />
int m_nNumber = 0;<br />
void Increase()<br />
{<br />
CSingleLock lock(&m_cProtect, true);<br />
m_nNumber++;<br />
}

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

Vladimir Dubovoy18-Oct-04 1:25

Vladimir Dubovoy

18-Oct-04 1:25

Hi!
I just try to implement class with members which return const values:
class MyClass{
* * *
protected:
float GetVal() const {return val;}
private:
float val;
}

It compiled well without "const" but with it I got multiple errors. I can not avoid of use "const" becuse I must follow
some coding style.
So your help is very essential for me.

I code in VS 6.

Mad__18-Oct-04 1:33

Mad__

18-Oct-04 1:33

You function return value Wink | ;)

why const ? Wink | ;)

22491718-Oct-04 1:45

224917

18-Oct-04 1:45

The code you posted compiles fine on vc6. Did you missed something ?

There is no spoon.

mail

Antony M Kancidrowski18-Oct-04 1:57

18-Oct-04 1:57

What errors did you get?

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

Vladimir Dubovoy18-Oct-04 3:18

Vladimir Dubovoy

18-Oct-04 3:18

Thanks to all.
I just fix it.
The metter was not in "const" but in member name.

Malcolm Smart18-Oct-04 11:05

Malcolm Smart

18-Oct-04 11:05

Like Mad___ said, you are returning a value - why would you want to return a const value? Isn't it the member, val, that is const?

The method doesn't know the type of variable the return value is being stored in?

Can anybody help please?!!?

Cheers

Angel

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