Re: Icons - C / C++ / MFC Discussion Boards

AnithaSubramani30-Sep-08 1:58

30-Sep-08 1:58

Hi All,

I have created a MFC dll with dialog box(It doesn't have any methods.only dialog box).I got sam.dll and sam.lib.Now i want to use this sam.dll to my MFC application.That is,
If i click ok button,It should show that dll dialog.I dont know how to import to my button click event.

Plz... helpme.

Thanks & Regards,

Anitha

Re: MFC dll creation

_AnsHUMAN_ 30-Sep-08 2:25

_AnsHUMAN_

30-Sep-08 2:25

Did you read this[^]

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: MFC dll creation

SandipG 30-Sep-08 3:03

SandipG

30-Sep-08 3:03

Do you want to create Resource only DLL??
If yes you can search CP there are good articles for the same.

Regards,
Sandip.

Icons

Sarriss30-Sep-08 1:56

Sarriss

30-Sep-08 1:56

Ive seen a lot of applications load icons that seem to be a higher colour rate

the standard is 32x32 16bit color

is there a way to use an icon that is 256 or truecolor

in WINAPI or MFC

cheers

From Sarriss

Re: Icons

Iain Clarke, Warrior Programmer30-Sep-08 2:15

Iain Clarke, Warrior Programmer

30-Sep-08 2:15

LoadImage is your friend. Two of the params specify a desired width and height (though all the icons I've come across have been square, I suppose that might not be true occasionally).

HINSTANCE hInst = AfxFindResourceHandle (MAKEINTRESOURCE(IDI_MYICON), RT_ICON);
HICON hHiRes = (HICON)::LoadImage (hInst, MAKEINTRESOURCE(IDI_MYICON), IMAGE_ICON, 256, 256, LR_DEFAULTCOLOR);

There's no error handling there, but I hope that gives you the idea. The AfxFindResourceHandle is MFC only, but if you're doing raw API, then I'm sure you have a (eg) m_hInstanceResource somewhere in your code to use.

Iain.

Re: Icons [modified]

Sarriss30-Sep-08 2:20

Sarriss

30-Sep-08 2:20

cheers

Another question

Im using visual studio 2005, I add the icon which is bigger(64X64) in high res colour
and it says

Warning: Visual Studio Image Editors do not support 32bit color images. Your changes will be discarded when
 saving the image.

Is that important or can i ignore that? I dont need to edit the icon just include it I wanna know if this is a cause that will stop the icon from loading?

modified on Tuesday, September 30, 2008 8:48 AM

Re: Icons

Iain Clarke, Warrior Programmer30-Sep-08 4:39

Iain Clarke, Warrior Programmer

30-Sep-08 4:39

You can ignore any deficiencies in the IDE, as long as the resource compiler can handle it. I doubt that it even cares about the content of the icon.

The source icon is stored in an external ico file, with just a reference in your rc file. I suspect the rc.exe treats it as an opaque blob of data. If it's bad data, LoadImage will choke at a later date.

Iain.

Re: Icons

Sarriss30-Sep-08 5:00

Sarriss

30-Sep-08 5:00

The Code you said worked pretty well

I used a variation through API

WNDCLASSEX wc;
....
wc.hIcon = static_cast<hicon>(LoadImage(  hInstance,
                                              MAKEINTRESOURCE(IDI_ICON1),
                                              IMAGE_ICON,
                                              255,
                                              255,
                                              LR_DEFAULTCOLOR));
........................................................................
wc.hIconSm = static_cast<hicon>(LoadImage(  hInstance,
                                              MAKEINTRESOURCE(IDI_ICON1),
                                              IMAGE_ICON,
                                              16,
                                              16,
                                              LR_DEFAULTCOLOR));
</hicon></hicon>

Also a note to be taken in this, I could only get images up to 255 to work not 256, it completly rejects the file if you have any 256 in there. Thought i might just mention that.

There is also an issue with alpha blend in Visual studio, some mentioned a way around that and i quote,

"If you have an icon with alpha blend, visual studio will get rid of it straight away, so to get around that,

-->Put the icon in your /res/ folder
-->import the file via your resource editor
-->close the file in the resource editor so its not in view
-->save the project
-->copy the .ico with alpha blend over the top of the one in your res folder
-->rebuild your application
-->and you should have alpha blend,

you will not be able to open the icon in resource editor againbecause it will get rid of the alpha blend again."

This is my findings in working on my initial question, i hope it helps anyone else looking for this.

Compression in C#

RYU^^30-Sep-08 1:23

RYU^^

30-Sep-08 1:23

Hi,

I am looking at a way to do zip compression in C#. Is there any free library that is as fast as winzip?

Thanks Smile | :)

Re: Compression in C#

RYU^^30-Sep-08 1:23

RYU^^

30-Sep-08 1:23

Upss.. wrong forum... sorry...

Re: Compression in C#

ThatsAlok30-Sep-08 1:34

ThatsAlok

30-Sep-08 1:34

good you saved yourself from hand of cruel c++ developer Big Grin | :-D

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You/xml>

Re: Compression in C#

Hamid_RT30-Sep-08 4:47

Hamid_RT

30-Sep-08 4:47

If you like to use of c++ for it see Zip and Unzip in the MFC way[^] else Im sorry you are on the wrong forum. Smile | :)

Re: Compression in C#

RYU^^30-Sep-08 23:49

RYU^^

30-Sep-08 23:49

If I can't get the answer from C# forum, I will try and download the demo project and try to see how fast does it compress the file. If it is fast, will build the COM object for it.

Thanks Hamid Smile | :)

Re: Compression in C#

Hamid_RT1-Oct-08 8:42

Hamid_RT

1-Oct-08 8:42

You're welcome. Smile | :)

__stdcall compile error?

George_George30-Sep-08 1:07

George_George

30-Sep-08 1:07

Hello everyone,

I want to export a function in DLL, and using extern C and __stdcall together to resolve name decoration issue -- so I need dllexport/stdcall/extern C together to define a function.

But I have played a while there is always compile error? Why? Here is my code and related compile error.

extern "C" __declspec(dllexport) __stdcall BOOL WINAPI StoreData(DWORD dw)

1>d:\visual studio 2008\projects\testdll\testdll\dllmain.cpp(78) : error C2143: syntax error : missing ';' before '__stdcall'
1>d:\visual studio 2008\projects\testdll\testdll\dllmain.cpp(78) : warning C4229: anachronism used : modifiers on data are ignored
1>d:\visual studio 2008\projects\testdll\testdll\dllmain.cpp(78) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>d:\visual studio 2008\projects\testdll\testdll\dllmain.cpp(78) : error C2377: 'BOOL' : redefinition; typedef cannot be overloaded with any other symbol
1>        c:\program files\microsoft sdks\windows\v6.0a\include\windef.h(153) : see declaration of 'BOOL'
1>d:\visual studio 2008\projects\testdll\testdll\dllmain.cpp(79) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>d:\visual studio 2008\projects\testdll\testdll\dllmain.cpp(105) : error C2143: syntax error : missing ';' before '__stdcall'
1>d:\visual studio 2008\projects\testdll\testdll\dllmain.cpp(105) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>d:\visual studio 2008\projects\testdll\testdll\dllmain.cpp(106) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int

regards,
George

Re: __stdcall compile error?

CPallini30-Sep-08 1:49

CPallini

30-Sep-08 1:49

I don't know how __stdcall helps you in resolving name decoration issues, anyway you should use it after the return type of the function.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: __stdcall compile error?

George_George30-Sep-08 2:00

George_George

30-Sep-08 2:00

Thanks CPallini,

Your solution works. But are there any MSDN documents mentioning the rule/syntax where to put __stdcall? I searched but not found.

regards,
George

Re: __stdcall compile error?

CPallini30-Sep-08 2:23

CPallini

30-Sep-08 2:23

You've to search better Wink | ;)

, from MSDN [^]:

return-type __stdcall function-name[(argument-list)]

Smile | :)

Re: __stdcall compile error?

George_George30-Sep-08 21:56

George_George

30-Sep-08 21:56

Thanks CPallini,

This is exactly what I am looking for. Smile | :)

regards,
George

Re: __stdcall compile error?

toxcct30-Sep-08 2:02

toxcct

30-Sep-08 2:02

Georges,

you have redundant declarations:
"extern "C" __declspec(dllexport) __stdcall BOOL WINAPI StoreData(DWORD dw)"

__stdcall is wrongly placed. it should be after the return type.
WINAPI is already defined for your function. remove it, and place __stdcall instead

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Re: __stdcall compile error?

George_George30-Sep-08 21:55

George_George

30-Sep-08 21:55

Thanks toxcct,

From MSDN I have not found __stdcall grammar, about which is the correct place -- as you mentioned after return type. Are there any documents mentioning the grammar? Smile | :)

regards,
George

Re: __stdcall compile error?

toxcct30-Sep-08 21:59

toxcct

30-Sep-08 21:59

George_George wrote:
From MSDN I have not found __stdcall grammar, about which is the correct place -- as you mentioned after return type. Are there any documents mentioning the grammar?

liar, you saw CPallini's answer[^]...

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Re: __stdcall compile error?

George_George30-Sep-08 22:04

George_George

30-Sep-08 22:04

Thanks, I also found it. I missed his reply before. Smile | :)

regards,
George

Re: __stdcall compile error?

Matthew Faithfull30-Sep-08 3:37

Matthew Faithfull

30-Sep-08 3:37

George, this sounds like quite a neat trick and potentially useful for sharing/porting code modules between compilers e.g. Borland/Microsoft. Why don't you write this up, the reasons for wanting it and an little example as an article for Code Project. I for one would be interested.

"The secret of happiness is freedom, and the secret of freedom, courage."
Thucydides (B.C. 460-400)

Re: __stdcall compile error?

Mark Salsbery30-Sep-08 4:59

Mark Salsbery

30-Sep-08 4:59

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

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