dllcall how to use

[faustf]

hi guys i start to study , a dllcall ,

i have a program metatrader 4 is program for work in stock exchange  i want interaact with them , and autoit.

for do that i want use the program mt4gui , it is composed for 2 part  one is .dll and one is .mqh library  for metatrader , (the language of metatrader is mql4 is like c style)

i trye to write a simple script for return a version but  returnonly number 2

this is my script

#include <ButtonConstants.au3>
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <Array.au3>

#Region ### START Koda GUI section ### Form=
$Form1 = GUICreate("Form1", 623, 449, 192, 114)
$Button1 = GUICtrlCreateButton("Button1", 272, 208, 75, 25)
GUISetState(@SW_SHOW)
#EndRegion ### END Koda GUI section ###
Global $DllPath="C:\Users\pc\AppData\Roaming\MetaQuotes\Terminal\B6FECCFE53E01D2BAC26AAD9B14029A8\MQL4\Libraries\"
While 1
    $nMsg = GUIGetMsg()
    Switch $nMsg
        Case $GUI_EVENT_CLOSE
            Exit
        Case $Button1
        Local $aResult =    DllCall ($DllPath&"mt4gui2.dll","str","guiVersion")
        _ArrayDisplay ($aResult)
    EndSwitch
WEnd

the dll and mqh file is free dolodable  of  this link

http://www.mt4gui.com/files/mt4gui26.rar

the rar have password: fx1

http://www.mt4gui.com/files/mt4gui2.mqh

this you can see a api call

http://www.mt4gui.com/files/mt4gui-cheatsheet.pdf

here you can download metatrader  and create a demo account for testing

https://download.mql5.com/cdn/web/metaquotes.software.corp/mt4/mt4setup.exe?utm_source=www.metatrader4.com&utm_campaign=download

thankz  At all

[Nine]

mt4gui2 - get version of mt4gui !  2 seems to be right ?

[Danyfirex]

Is it Unicode DLL?

 

Try to return wstr instead str.

 

Saludos

[faustf]

return an arry with number 2 in position 0 , i dont know if is unicode how is possible see ?? i suppose yes  because the app is international

thankz

[Danyfirex]

Local $aResult =    DllCall ($DllPath&"mt4gui2.dll","wstr","guiVersion")

Saludos

[faustf]

Mito

thankz