How to use GetComputerName API, I am new to asm can anyone help how to use GetComputerName API in masm?

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ragdog

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You wrote

QUOTE

nSize dd 20

Msdn say

QUOTE

lpnSize [in, out]
On input, this variable specifies the size of the lpBuffer buffer

and the size of username is 256+1

#define UNLEN 256 // Maximum user name length

and +1 for 0 end of string

now have you 257

Msdn

QUOTE

lpBuffer [out]

A pointer to the buffer to receive the user's logon name. If this buffer is not large enough to contain the entire user name, the function fails. A buffer size of (UNLEN + 1) characters will hold the maximum length user name including the terminating null character. UNLEN is defined in Lmcons.h.

What if Username longer as 20 bytes?

Better you use 257 or sizeof lpUsername

CODE

lpUsername db 257 dup (0)

Invoke GetUserName,addr lpUsername,257

or
Invoke GetUserName,addr lpUsername,sizeof lpUsername

Greets,


winnet
Member Group: Members Posts: 20 Member No.: 41214 Joined: 18-January 11	Yeah You are right Ragdog I ignored it when I was explaining wsprintf I should use max Length

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