Hello,

I have an application with several modules (MS COFF OBJs). I have some functions declared in some modules and I want to call them from another module.

In MASM, we have the PROTO directive which we use to declare our functions from another modules. Like:

MyFunc1 PROTO :DWORD, :DWORD...

How can I import in my .asm module another functions from my other .asm modules? Should I use EXTRN MyFucnX:DWORD, or there is a better way in FASM?

Thanks.

You should use EXTRN, but without ":DWORD".

Hello Tomasz,

Thanks for the hint.

If I declare it with just EXTRN (without ":DWORD") I get the following error when called via:

invoke MyFunc, Param1, Param2

--
Error: Proc32.ini [20] invoke [6]:
call [proc] }
operand size not specified
--

So, I have to put the :DWORD for the procedure. Is this OK then?

Thanks.

You should use "stdcall" macro for such calls, not "invoke". "invoke" uses the pointer variable to call the procedure, while "stdcall" calls the procedure directly.

I stronglly recommend reading through the documentation, also in PDF format included in the fasm for Windows package.