For several hours now I have been attempting to use the command line tools to
build and test my own dll with little success.  I am able to compile X.dll as I
see the file is created but if I run "implib X.lib X.dll" to create the import
library, implib tells me there are no exported functions.  I am writing in C and
have prefixed the function with
__descspec(dllexport)

When I try to link the dll with a small test C program I get the error message: Error 42: Symbol Undefined _FunctionNameHere

Can anyone help with this?

Did you compile with -WD ?

Wayne wrote:

> For several hours now I have been attempting to use the command line tools to
> build and test my own dll with little success.  I am able to compile X.dll as I
> see the file is created but if I run "implib X.lib X.dll" to create the import
> library, implib tells me there are no exported functions.  I am writing in C and
> have prefixed the function with
> __descspec(dllexport)
>
> When I try to link the dll with a small test C program I get the error message: Error 42: Symbol Undefined _FunctionNameHere
>
> Can anyone help with this?

--
ManiaC++
Jan Knepper

Post your source, and your exact cmd-line(s), and we'll take a look

If there's any valuable IP in the source, just chop it out from the functions and leave them as shells. But do leave the functions in. :)

"Wayne" <Wayne_member@pathlink.com> wrote in message news:b9rvv3$2lpu$1@digitaldaemon.com...
> For several hours now I have been attempting to use the command line tools
to
> build and test my own dll with little success.  I am able to compile X.dll
as I
> see the file is created but if I run "implib X.lib X.dll" to create the
import
> library, implib tells me there are no exported functions.  I am writing in
C and
> have prefixed the function with
> __descspec(dllexport)
>
> When I try to link the dll with a small test C program I get the error
message:
> Error 42: Symbol Undefined _FunctionNameHere
>
> Can anyone help with this?
>
>

I've been able to create a working DLL from the DMCDLL sample code with no problem, but when I try to call the DLL from VB I get an error message: Error 49 Bad DLL calling convention.

I tried 30-40 times and can't remember exactly what changes I made, and I can't find the command line commands that I used, but dmctest.exe produces the expected results.

I don't want to know anything about DLLs except how to create one that can be used by VB to add two integers. I don't wnat to know anything about the linker or impdef other than what command line switches to use. I don't want to buy any books that have one paragraph that will be of use to me.

Does anyone have any suitable source code?