in win32api resize window - C / C++ / MFC Discussion Boards

Re: in win32api problem working with dll

Albert Holguin17-Jan-12 13:55

17-Jan-12 13:55

You have to have the full path as you used in the second thing you wrote up there. Make sure the file is there and the file is accessible (not locked somehow).

This error:
Error 50 error LNK2019: unresolved external symbol _showall referenced in function _WndProc@16 1.obj
...means that it cannot find the showall function (with some decoration), this may be caused for a number of reasons, the function either doesn't exist in the library, or the settings between the lib and the executable that determine the function name mangling (or decoration) are different (see this[^]). You can avoid function decorations by importing/exporting functions using C-style methods for importing/exporting from libraries (which used no decorators at all). This may be your issue.

You had posted a different error before, so not sure if your linker is even finding the library file correctly.

Re: in win32api problem working with dll

Richard MacCutchan17-Jan-12 23:02

Richard MacCutchan

17-Jan-12 23:02

Show us the contents of the 12121.lib file. Also, in the second case your path string is incorrect; each backslash in the path should be preceded by another in order for the character escape sequences to be correct, thus:

C++

#pragma comment(lib,"C:\\Documents and Settings\\bla\\My Documents\\Visual Studio 2008\\Projects\\12121sdf\\12121.lib")

Note that this will fail silently as the compiler fails to validate this string.

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Re: in win32api problem working with dll

Albert Holguin18-Jan-12 4:38

Albert Holguin

18-Jan-12 4:38

Richard MacCutchan wrote:
each backslash in the path should be preceded by another in order for the character escape sequences to be correct

Forgot about that... I almost always just use the lib name in pragma comments and add the directory as a "library directory" (since the compiled libraries are usually kept together, in my case anyway).

Re: in win32api problem working with dll

Richard MacCutchan18-Jan-12 6:12

Richard MacCutchan

18-Jan-12 6:12

Yes, me too. Interestingly when I tested this although my string was wrong, the actual escapes were valid (\f and \b) so the problem was not diagnosed by the compiler.

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in win32api i need animation ,jumping ball .someone know where i can find the code for this ?

a1_shay17-Jan-12 11:46

a1_shay

17-Jan-12 11:46

thanks

Re: in win32api i need animation ,jumping ball .someone know where i can find the code for this ?

Richard MacCutchan17-Jan-12 11:51

Richard MacCutchan

17-Jan-12 11:51

Look at some of the articles here on CodeProject or search Google. Animation like this is not that difficult once you have learned the principles of Windows GDI[^] and/or GDI+[^].

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: in win32api i need animation ,jumping ball .someone know where i can find the code for this ?

Albert Holguin17-Jan-12 13:28

Albert Holguin

17-Jan-12 13:28

You should put a little bit of effort yourself to accomplish your task. Then we can help you understand any issues or questions you may have.

in win32api resize window

a1_shay17-Jan-12 6:16

a1_shay

17-Jan-12 6:16

in win32api
if i resize the window i want all the things i have inside to move also ,how can i do that ?
thanks

Re: in win32api resize window

Chris Meech17-Jan-12 6:30

Chris Meech

17-Jan-12 6:30

One suggestion would be to walk through the list of all child windows and call MoveWindow() for each of them to place them in new positions. If you are looking for a single API call to do this, I don't beleive such a call exists. Smile | :)

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Re: in win32api resize window

Albert Holguin17-Jan-12 6:46

Albert Holguin

17-Jan-12 6:46

Chris Meech wrote:
I don't beleive such a call exists.

I believe you're right... Smile | :)

Re: in win32api resize window

Chris Meech17-Jan-12 6:51

Chris Meech

17-Jan-12 6:51

I'll have to talk to The Big Guy about that spell checker. Big Grin | :-D

Re: in win32api resize window

Albert Holguin17-Jan-12 6:54

Albert Holguin

17-Jan-12 6:54

Browse on Firefox... it's built in... Big Grin | :-D

Re: in win32api resize window

Albert Holguin17-Jan-12 6:48

Albert Holguin

17-Jan-12 6:48

Chris is right... there's really no simple way of doing this... they have to be moved independently.

Re: in win32api resize window

CPallini17-Jan-12 6:50

CPallini

17-Jan-12 6:50

You have to move them yourself since there's nothing automatic in Win32.
Smile | :)

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Re: in win32api resize window

David Crow17-Jan-12 6:54

David Crow

17-Jan-12 6:54

See the Extras section of this article. It's MFC, but you should be able to accomplish the same thing with Win32.

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Re: in win32api resize window

PJ Arends17-Jan-12 9:27

PJ Arends

17-Jan-12 9:27

Look up DeferWindowPos, BeginDeferWindowPos, and EndDeferWindowPos functions in MSDN.

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modified 17-Jan-12 17:36pm.

Re: in win32api resize window

a1_shay17-Jan-12 11:44

a1_shay

17-Jan-12 11:44

wow i like this forum.
because i have an exam i dont have the time to check yours suggestion. i decide to limit the resize the window so i dont need to move anything.with this

case WM_GETMINMAXINFO:
{
LPMINMAXINFO pinfo =(LPMINMAXINFO)lParam;
if (pinfo!=NULL)
{
pinfo->ptMinTrackSize.x=750;
pinfo->ptMinTrackSize.y=550;
}
return 0 ;
}

thanks again

Re: in win32api resize window

Albert Holguin17-Jan-12 13:58

Albert Holguin

17-Jan-12 13:58

a1_shay wrote:
wow i like this forum.

Glad you like it... now use it wisely...

C syntax problem

__John_16-Jan-12 23:25

__John_

16-Jan-12 23:25

Hi,

The following code compiles no probs...

typedef struct SLLNode_t
{
    void* m_pData;
    struct SLLNode_t* m_pNext;
};


void foo()
{
    struct SLLNode_t* pNewNode = (struct SLLNode_t*)malloc(sizeof(struct SLLNode_t));
}

The following, with a call to assert, generates a an error C2143: syntax error : missing ';' before 'type'.

typedef struct SLLNode_t
{
    void* m_pData;
    struct SLLNode_t* m_pNext;
};


void foo()
{
    assert(0 == 0);

    struct SLLNode_t* pNewNode = (struct SLLNode_t*)malloc(sizeof(struct SLLNode_t)); // < C2143 here.
}

assert is defined as follows...

#define assert(_Expression) (void)( (!!(_Expression)) || (_wassert(_CRT_WIDE(#_Expression), _CRT_WIDE(__FILE__), __LINE__), 0) )

What is wrong? How do I fix it?

Thanks - John.

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― Henry Ford

Re: C syntax problem

CPallini16-Jan-12 23:44

CPallini

16-Jan-12 23:44

__John_ wrote:
What is wrong?

In C programming language variable declarations must be at the beginning of the block.

__John_ wrote:
How do I fix it?

This way

void foo()
{
  struct SLLNode_t* pNewNode = (struct SLLNode_t*)malloc(sizeof(struct SLLNode_t)); 
  assert(0 == 0);
}

Re: C syntax problem

«_Superman_»17-Jan-12 0:12

«_Superman_»

17-Jan-12 0:12

You could do this -

void foo()
{
  struct SLLNode_t* pNewNode = NULL;
  assert(0 == 0);
  pNewNode = (struct SLLNode_t*)malloc(sizeof(struct SLLNode_t));
}

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Re: C syntax problem

CPallini17-Jan-12 0:17

CPallini

17-Jan-12 0:17

Of course. However, it won't change program behaviour. Big Grin | :-D

Re: C syntax problem

«_Superman_»17-Jan-12 0:28

«_Superman_»

17-Jan-12 0:28

Normally assert is done before any processing is done.
That's what I meant to indicate.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Re: C syntax problem

CPallini17-Jan-12 0:32

CPallini

17-Jan-12 0:32

Yes, I got that. I was just kidding a bit on 'assert(0==0)'.
Smile | :)

Re: C syntax problem

__John_17-Jan-12 0:32

__John_

17-Jan-12 0:32

Doh!

I've been doing C++ for too long and forgot that one.

Thanks guys, +5 all round.

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