help with image, please!

[stefythebest]

Hello!! I'm a newbie in autoit and i'm trying to make a simple gui with a button to load an image. I have a dll (written in c++ with opencv) which opens an image file from a selected path and i want to call it from my gui.

The DllCall returns 0, so it works, but the image can't be displayed (even if in the dll function a window opens automatically thanks to an opencv function)

thank you for your help! :">

[stefythebest]

sorry, i haven't posted my code!!!

func action_agd_Button_1()

$dll1 = DllOpen("C:/Documents and Settings/Media/Desktop/PROVE_DLL/nuova dll/Debug/nuova dll.dll")

$risultato = DllCall($dll1, "void", "ApriImmagine", "void", "")

DllClose($dll1)

MsgBox(0,"Risultato della chiamata",$risultato)

;$result = DllCall("user32.dll", "int", "MessageBox", "hwnd", 0, "str", "Cancellare i dati?", "str", "Cancella dati", "int", 1)

endfunc

[stefythebest]

Please, give me an help..If i have made some mistake in the post, say it to me.

[xcal]

I totally suck with DllCall, but I don't think you can use 'void.' Have a look here.

[stefythebest]

Thank you for your help!

I make a type int in the return typre of my function and now the code is:

$dll1 = DllOpen("C:/Documents and Settings/Media/Desktop/rgb2gray/Debug/rgb2gray.dll")

$risultato = DllCall($dll1, "int", "fnRgb2gray", "int", 1)

MsgBox(0,"Risultato della chiamata",$risultato[1])

DllClose($dll1)

However, when i try to show the parameters of the function fnRgb2gray, i obtain this error:

Subscript used with non-Array variable.:

could anyone help me?

Obviously, the dll function doesn't make its work...

[stefythebest]

Thank you xcal ,now i have solved my little problem and my gui works well!!

[Richard Robertson]

The problem was that you don't need any parameters. DllCall("dll", "return", "function" [OPTIONAL_PARAMETERS]).

Just DllCall($dll1, "int", "fnRgb2gray").