C / C++ / MFC

13-May-08 2:13

i have two application one is a library and another is a dll. i want to use the variable which is declared in a lib in the dll. I used declspec dllexport and declspec dllimport but it is giving LNK2001 error. How to resolve this?

Thanks & Regards

Rajkumar R13-May-08 2:24

13-May-08 2:24

Do you mean you want to use the variable, defined in static Library, in the Dll? If so no need of dll(ex/im)port declarators, declare the variable as extern in Dll and link the static library to the DLL.

V K 213-May-08 2:29

13-May-08 2:29

i have variable in static library and i want to use the variable in a dll. While compiling the dll i am getting the linker errors

Rajkumar R13-May-08 2:34

13-May-08 2:34

I already suggested try it.

V K 213-May-08 2:47

13-May-08 2:47

i declared a variable int x in the lib. and declared as extern int x in the dll and linked the lib to the dll. but i am getting the linker error LNK2001 while compiling the dll.

Any suggestions?

Rajkumar R13-May-08 2:56

13-May-08 2:56

post the full length link error. and the declaration of variables.

David Crow13-May-08 2:48

David Crow

13-May-08 2:48

venkat.kupunaram wrote:
...and i want to use the variable in a dll.

How have you defined it?

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V K 213-May-08 3:08

13-May-08 3:08

I have lib print.lib .Here I have some data which I need to transfer to clib.lib.. But clib.lib gets linked to a dll alm.dll..

I have declared a variable int aprint; in print.lib. I was able to compile successfully.

I declared the same variable as extern in clib.lib, I was able to compile successfully.

When when I try to compile alm.dll I am getting the linker error..

Plz suggest me how to resolve this error.

Rajkumar R13-May-08 3:31

13-May-08 3:31

again vague... form of description,
Now the scenario is not which you explained,
int aprint; is defined in print.lib;
extern int aprint; is declared in clib.lib;
now assuming alm.dll is not using the variable directly, if you link to clib.lib, you need to link to print.lib also to resolve the symbol aprint;

if you want to use aprint in alm.dll also, then extern declaration is need there also, you need to link all the three libs.

V K 213-May-08 3:40

13-May-08 3:40

I linked the two libs in the dll as you said. But same error.

Rajkumar R13-May-08 4:01

13-May-08 4:01

what's the error, why don't you post the link error full length.

tarnparency of Image

trioum13-May-08 2:00

trioum

13-May-08 2:00

can any one send me the code to set the transparency of the image
from 0-255 using gdiplus

Trioum

CPallini13-May-08 2:04

CPallini

13-May-08 2:04

trioum wrote:
can any one send me the code to set the transparency of the image
from 0-255 using gdiplus

Yes [^]

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
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-- Iain Clarke

Rajesh R Subramanian13-May-08 2:25

Rajesh R Subramanian

13-May-08 2:25

Usually we don't *send* code, but for noble causes (like the task is urgent, it is a homework, etc.,) we can send, I guess.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
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Rajkumar R13-May-08 2:32

13-May-08 2:32

you are tempting the OP to post, [BOLD]"PlZ. Plz. plz .... ITS URGENT"[/BOLD]
Smile | :)

Rajesh R Subramanian13-May-08 2:33

Rajesh R Subramanian

13-May-08 2:33

And the replies to such a post may probably teach him the lesson of a lifetime. Smile | :)

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Rajkumar R13-May-08 2:34

13-May-08 2:34