Yes, this DLL was written in C++. I have not depend.exe, dumpbin.exe. I will seek on inet this programs.

Thanks

Maros Klempa

>The error is usually caused because the dll function names are case sensitive.
>
>It may also be a C++ dll (since it works with a C++ program). A C++ dll should
>export functions in C style to be visible
>from VFP. If it exports functions in C++ style, then the function names are
>encoded (mangled) and they can
>be used only from C++ programs.
>
>The easiest way to diagnose the problem is to look into the dll and see what
>functions are exported.
>To do it, you can use the Quick Viewer, the Dependency Walker (depend.exe)
>from the WinNT Resource Kit, or the
>dumpbin.exe program installed by VC++. There are any other dll viewers, but,
>usually, at least one of the above
>is available on any development computer.
>
>Vlad
>
>>I have DLL named SIP.DLL. This DLL contain function SendLine.
>>I want use it. In VFP I use command
>>DECLARE INTEGER SendLine IN SIP.DLL STRING cPort, STRING cString, STRING cAddress, STRING cFlowControl
>>This command work o.k. Next I use command
>>nRetVal=Sendline('1','Text','1')
>>When I use this command VFP return error 'Cannot find entry point
>>SendLine in the DLL'. What does it mean?
>>Name of function SendLine is correct, because I have another program
>>in C++ which use SendLine and this C++ program work o.k.