Pardon me for jumping in.

Virusim, I'm afraid you got part of what Ed said backwards. For the DLL to work with your Fox 2.x app, it must be 16 bit. If you find that the DLL is 32-bit, you must replace it with a 16-bit equivalent.

HTH,
Rich.

>Hi,
>
>Thank for your advise and help.
>My foxpro 2.5/2.6 written application can be run on Win3.1/Win9x
>without any problem.
>I can't tell whether the protection DLL file is a 16 bit one as it is
>written by other programmer who had left the company
>If the Dll is a 16 bit one, then I look for a 32bit DLL
>
>On the other hand, I trace to the CallFN() function that call the HASP
>DLL which will halt my system. If commented out, it run fine.
>So, it maybe the DLL file problem.
>
>Thank for your advise.
>
>
>
>>>Hi,
>>>
>>>I had a foxpro 2.5/2.6 written application that call HASP protection DLL file for protection which when run under WinNT 4, give me only a blank white screen, then halt my system.
>>>
>>>On the other hand, using the same HASH DLL file with my Vfp 3 application, my application run without any problem.
>>>
>>>Could it be the problem of Foxpro 2.5/2.6 REGFN function problem with my application. Please advise or help. Thank a lot
>>
>>Is the .DLL a Win16 or Win32 .DLL? If it's a Win32 .DLL, it's usable from VFP, but not from FPW, which is a 16 bit application.