Call 32 bit DLL in 16bit Vc++1.5

[qiban]

I'm working on write a small program to call a DLL to R/W data into RS232. I use vc__1.5 editor.
OS show a "caused a General Protection Fault" while I run it.
I guess that because I used a 16bit editor to call 32bit Dll (If I’m wrong, don’t laugh at me).
Is there any way can fix this problem?
Thanks

[Paul McKenzie]

Originally posted by qiban
I'm working on write a small program to call a DLL to R/W data into RS232. I use vc__1.5 editor.
OS show a "caused a General Protection Fault" while I run it.
I guess that because I used a 16bit editor to call 32bit Dll (If I’m wrong, don’t laugh at me).
Is there any way can fix this problem?
Thanks Why not create a 32-bit program? If the DLL is a 32-bit DLL, the easiest solution is to write a 32-bit application.

Regards,

Paul McKenzie

[qiban]

Tnakhs for respond. I have to edit it with 16 bit editer. because this problem is part of a project. the whole project created by Vc++1.5. If I use vc++6.0, I should change a lot

[ranjan_j]

Try thuking. Read material on Generic Thunks in MSDN for more help. Generic thunks provide a mechanism for 16-bit applications to call functions in Win32-based DLLs.

regards,
Ranjan

[qiban]

Thank you, Ranjan, I will try it.
Thanks again

[qiban]

Sorry, it's does not work. Vc++1.5 use windows 3.1 SDK.

[ranjan_j]

What is ur os config and what problem are u facing using thunk functions ?

regards,
Ranjan

[qiban]

I use Windows XP. and In vc1.5 , it's windows3.1 SDK. so I can not try using thunk functions. Is there other way?
Thanks,

[ranjan_j]

Well this application that you want to write, does it have any restrictions on being a 32-bit application ? Else u can write a 16-bit application and call ur 16-bit dll from it.

[qiban]

In this DLL, it used CreateFile() function. I think this is a 32-bit function.