Are you looking to use MASM to write those time critical functions but just can't get it into MSVC++???? well so was I... and i found my answer in the microsoft Knowledge base... (microsoft actually helping us??? hmmm..) anyway.. goto article Q106399 (or goto the address i give here) http://support.microsoft.com/support/kb/articles/Q106/3/99.asp?LNG=ENG&SA=PER&FR=0 ps. (i just edited over my original question with this answer because i worded it bad anyway) good luck, RanXact Edited by - ranxact on 2/15/00 10:17:52 PM

You're missing the braces. VC++ requires braces wrapping the function header like so:

extern "C" {
// function header
}

In Borland you can declare without the braces, but in VC++ I'm pretty certain they're required. Also, the docs state calls to MASM generated functions should be declared with __stdcall like this:

extern "C" {
return_type __stdcall FunctionName ();
}

Where return_type is, of course, int, void, float, etc...

I've actually never used __stdcall when calling external assembly routines and I've had no problems. The books I've read do not use it. Now I will after reading the docs.

Another thing, extern "C" is NOT legal in the C language. It can only be used from within C++. If you are declaring functions for C source files only then you do not need the extern "C" syntax.If you have functions to be used with C AND C++ source files, this is how you should declare them:

#ifdef __cplusplus
extern "C" {
#endif

// function headers go here

#ifdef __cplusplus
}
#endif



Edited by - Aldacron on 2/14/00 7:10:39 PM

Thank YOu for the info, but that was only one of my problems. (i was using a c program not c++ to test my funcs.. DOH!) my main problem is that i don''t know how to get VC++ to use the funcitons.. as in the linker cannot find them, or it searches for them in Kernal32.dll....

this is the error when i debug it

Loaded ''C:\WINDOWS\SYSTEM\KERNEL32.DLL'', no matching symbolic information found.
The thread 0xFFF84B83 has exited with code 259 (0x103).
The program ''c:\MASM32\TEMP\Tester\Debug\Tester.exe'' has exited with code 259 (0x103).

but why is it looking there and how do i tell it to look where it should? and for that matter, what file should i give it? really i know it is something stupid... but again help would be appreciated

Thank you,
RanXacT

I''m pretty sure you should add the compiled asm file (the obj file) to the project so it gets linked in with the project''s compiled C/C++ source files... If that''s what you''re asking.

------------------------------
Jonathan Little
invader@hushmail.com
http://www.crosswinds.net/~uselessknowledge

I''ve Found what i was looking for!!!!

all these answers and more have been answered in the microsoft Knowledge Base even though microsoft has just about disowned MASM... they still have a few things left

well, the addy is long, but here it is

http://support.microsoft.com/support/kb/articles/Q106/3/99.asp?LNG=ENG&SA=PER&FR=0

i''d cut and paste it, but it is kinda long.

thank you all for your help...
and i hope that this may be of some help to the other poor clueless souls out there like me ...

RanXacT

ranxact, that''s much for posting this question.. i''d been running into the same thing, and was about to post, but i ran across yours first. again, thanks alot for asking (and answering) the same question i had..