Passing strings to procedures

[Lightman]

Hello Everybody,

How do I pass a string to a procedure? For example, I could pass a dword....

Code Select Expand


MyProc   PROTO  :DWORD


Code Select Expand


MyProc   PROC   foo:DWORD
   mov   eax, foo
   ...
   ret
MyProc ENDP


Code Select Expand


invoke   MyProc, 100h


But with a string? Do I just pass the address? But then how, would I reference that in the procedure itself...

Code Select Expand


MyProc   PROC   msg:DB 1024 DUP('1')
   invoke   MessageBox, hWnd, addr msg, addr AppName, MB_OK
   ...
   ret
MyProc   ENDP



Code Select Expand


MyProc   PROC  msg:DWORD
   invoke   MessageBox, hWnd, msg, addr AppName, MB_OK
   ...
   ret
MyProc   ENDP


I'm a but confused by this one.

[dedndave]

don't pass the string
pass the address of the string (pointer)

Code Select Expand

MyProc   PROC   lpszFoo:LPSTR
   mov   eax, foo
   ...
   ret
MyProc ENDP

Code Select Expand

    INVOKE  MyProc,offset szString