Pointers

[Kris123]

Dear All,

Here i would like to know how to declare the pointer.

Because i am passing a variable to a function, and there the function is receiving as ByRef.

So Please help..

Thanks in advance.

[jvanegmond]

Like in Visual Basic, you can just pass the variable to the function and not the pointer.

Please have a look at:

; Sample script with three user-defined functions
; Notice the use of variables, ByRef, and Return

$foo = 2
$bar = 5
swap($foo, $bar)
msgBox(0,"After swapping $foo and $bar", "$foo now contains " & $foo)
Exit

Func swap(ByRef $a, ByRef $B)  ;swap the contents of two variables
    Local $t
    $t = $a
    $a = $b
    $b = $t
EndFunc

Edited February 4, 2009 by Manadar

[Kris123]

Thanks for your reply.

I tried in the same way, but is not working....

[jvanegmond]

Please post the important parts of your code that are not working so we can isolate the issue.

[Kris123]

Actually i have a Dll exposed which will accept a variable byref.

Here from my script i am trying to pass a value to the Dll by ref.

But i am not getting any value into that variable.

Sample code is:

Protocol_Get(18, $value)

Func Protocol_Get($opcode, ByRef $value)

$AddResult = DllCall($PE_Plugin, "long", "Monitor_GetProperty", "long", $opcode, "long*", $value)

EndFunc

MsgBox(0, "", $value)

[jvanegmond]

I'm still a bit confused about this myself, but to give you a quick answer: AutoIt ByRef does not mean the value is converted into a pointer.

Your script should be something along these lines:

Protocol_Get(18, $value)

Func Protocol_Get($opcode, $value)
    $long = DllStructCreate("long")
    DllStructSetData($long, 1, $value)
    
    $AddResult = DllCall($PE_Plugin, "long", "Monitor_GetProperty", "long", $opcode, "long*", DllStructGetPtr($long))
EndFunc

[Kris123]

I have tried in this way.

But my problem is not solved.

[trancexx]

I have tried in this way.

But my problem is not solved.

Just read $AddResult[2]

[Kris123]

Thanks it is working.

Great job.