Writing string to buffer

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denial

Joined: 12 Sep 2004
Posts: 98

denial

Hi,

I wanted to write a string constant into an empty buffer:

Code:

'my string'

and my buffer:

Code:

buffer rb 15

now i wanted to use the following code to perform the operation:

Code:

cinvoke wsprintf,buffer,'%s','my string'

I thought I could do it that way, but it doesn't work.
The error message: Value out of range.
I'm a newbie, so can somebody help me? Confused

Regards
denial

19 Oct 2004, 19:31

Nikolay Petrov

Joined: 22 Apr 2004
Posts: 101
Location: Bulgaria

Nikolay Petrov

It's too easy.

Code:

include '%fasminc%/win32ax.inc'
buffer rb 32
.code

  start:
        invoke wsprintf,buffer,'%s',"Hi! I'm the example program!"
        invoke  MessageBox,HWND_DESKTOP,buffer,"Win32 Assembly",MB_OK
        invoke  ExitProcess,0

.end start

Tomorrow, i will send a simple how use wsprintf with all formats

19 Oct 2004, 19:54

denial

Joined: 12 Sep 2004
Posts: 98

denial

thank you very much, it was really too easy. i'm a fool Very Happy

19 Oct 2004, 22:30

Nikolay Petrov

Joined: 22 Apr 2004
Posts: 101
Location: Bulgaria

Nikolay Petrov

http://www.wasm.ru/srclist.php?list=9
Simple wsprintf

20 Oct 2004, 03:38

denial

Joined: 12 Sep 2004
Posts: 98

denial

Mhmm I've got another question... is it possible to increase the declared byte size of the buffer dynamicaly? Maybe there's something like malloc() in C?

20 Oct 2004, 10:50

roticv

Joined: 19 Jun 2003
Posts: 374
Location: Singapore

roticv

HeapAlloc and HeapReAlloc?

20 Oct 2004, 11:09

denial

Joined: 12 Sep 2004
Posts: 98

denial

I searched about HeapAlloc/HeapReAlloc, however if I'm not wrong, couldn't find an example.
Maybe you could give me one? Smile

20 Oct 2004, 11:45

polygon7

Joined: 14 Aug 2003
Posts: 62
Location: Poznan, Poland

polygon7

denial wrote:

I searched about HeapAlloc/HeapReAlloc, however if I'm not wrong, couldn't find an example.
Maybe you could give me one?

You could try:

Code:

src          dd ?

invoke  LocalAlloc,LMEM_FIXED,255
;255 is a number of allocated bytes
mov [src],eax
;[src] - pointer to allocated memmory

invoke        LocalFree,src
;freeing memmory

_________________
best regards
p7

21 Oct 2004, 18:29

denial

Joined: 12 Sep 2004
Posts: 98

denial

Thank you for your answer. It helps me alot Smile

21 Oct 2004, 20:03

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