please help me for how do i open dll file in php form

Explain more detailedly what do you want. If you need to execute dll's functions then it will only be possible on Windows server and not through PHP anyway.

i have a dll file that return some varaible ,and i want to use that variable in php.
i write this code
Create DLL:
In VB create a New Active X DLL Project. In the Class1 properties
change the name (ex: CUserChangePassword). Change the Project name
(ex: UserChangePassword). Paste the Visual Basic source code from
below into the empty class. Go to File and Make dll.
-----------------------------------
Register DLL:
Copy DLL to server, remember what directory you copy it into. At
server click Start, Run, cmd, OK. Change to the directory the dll is
in. regsvr32 dllname (ex: regsvr32 UserChangePassword.dll). You should
see a message saying registration succeeded.
-----------------------------------
Create your PHP page. Sample code below:

$obj = new COM("UserChangePassword.CUserChangePassword");
$result = $obj->UserChangePassword
($strLogin,$strDomain,$strPassword,$newPassword);
$obj = null;
unset($obj);





but it gives me error. please tell me it is possible or not possible in php

error
Warning: Invalid ProgID, GUID string, or Moniker: Invalid syntax in c:\phpdev5\www\sulkprofile\dllregister3.php on line 3

Fatal error: Call to undefined function: () in c:\phpdev5\www\sulkprofile\dllregister3.php on line 7

Show me lines 0-10 so I could see an error. You probably do everything correct, but placed $ before some function.

if u are able to create a dummy code and give me . if it's possible than this is very helpful for me

Man, I never tried to execute DLLs from php, but I'm pretty sure that you just misspeled. The error description is too common and very familiar to me.