ASM Community

Hi, to every body.

Can some one please tell me how can I call Proc in FASM, I create the following code to search for text in a string:

proc FindString,DataAddress,DataSize,VarToCompare
enter
push ebx esi edi
mov ecx,
mov edi,
mov al,byte
cld
repne scasb
cmp ecx,0
; jne FSContinue
invoke MessageBox,HWND_DESKTOP,No_found,NULL,NULL
pop edi esi ebx
return

When I call this proc like this:
stdcall FindString,,10,_asm_extension

It says that the program has perform an illigal operation and it will shut down

If I use:
invoke FindString,,10,[_asm_extension]

I get an Invalid Size of Operand on compile time and If I use call I get an Extra characters on line

So what command should I use?

your stack is inbalanced, if you use enter, you also need to use leave

ex:

proc FindString,DataAddress,DataSize,VarToCompare
enter
push ebx esi edi
mov ecx,
mov edi,
mov al,byte
cld
repne scasb
cmp ecx,0
; jne FSContinue
invoke MessageBox,HWND_DESKTOP,No_found,NULL,NULL
pop edi esi ebx
leave ; <-------- Don't forget this
return