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LoadLibrary Help


Go to solution Solved by Malkey,

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Hello Guys, 

Just want to ask for help or guidance on why DllCall doesn't work with LoadLibrary but it works using the function _WinAPI_LoadLibrary.

What's wrong with my DLLCall.

#include <WinAPI.au3>


;local $module = _WinAPI_LoadLibrary("user32.dll") ; Working

Local $module = DllCall("Kernel32.dll", "Ptr", "LoadLibrary", "Str", "user32.dll") ; Not Working

if ($module) Then
   msgbox(0,"Success","Success!")
Else
   MsgBox(0,"Failed", "Failed!")
EndIf

Thanks,

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You need to extend the error checking of your script.

What is the value of @error after DllCall?

My UDFs and Tutorials:

Spoiler

UDFs:
Active Directory (NEW 2022-02-19 - Version 1.6.1.0) - Download - General Help & Support - Example Scripts - Wiki
ExcelChart (2017-07-21 - Version 0.4.0.1) - Download - General Help & Support - Example Scripts
OutlookEX (2021-11-16 - Version 1.7.0.0) - Download - General Help & Support - Example Scripts - Wiki
OutlookEX_GUI (2021-04-13 - Version 1.4.0.0) - Download
Outlook Tools (2019-07-22 - Version 0.6.0.0) - Download - General Help & Support - Wiki
PowerPoint (2021-08-31 - Version 1.5.0.0) - Download - General Help & Support - Example Scripts - Wiki
Task Scheduler (NEW 2022-07-28 - Version 1.6.0.1) - Download - General Help & Support - Wiki

Standard UDFs:
Excel - Example Scripts - Wiki
Word - Wiki

Tutorials:
ADO - Wiki
WebDriver - Wiki

 

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  • Solution

The DllCall function returns an array.

#include <WinAPI.au3>

Local $module = _WinAPI_LoadLibrary("user32.dll") ; Working
ConsoleWrite($module & @LF)

Local $module = DllCall("Kernel32.dll", "Ptr", "LoadLibrary", "Str", "user32.dll") ; Not Working
ConsoleWrite($module[0] & @LF)

If $module[0] Then
    MsgBox(0, "Success", "Success!")
Else
    MsgBox(0, "Failed", "Failed!")
EndIf
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As DllCall returns an array I would check for an array:

#include <WinAPI.au3>

Local $module = _WinAPI_LoadLibrary("user32.dll") ; Working
ConsoleWrite($module & @LF)

Local $module = DllCall("Kernel32.dll", "Ptr", "LoadLibrary", "Str", "user32.dll") ; Not Working
ConsoleWrite($module[0] & @LF)

If IsArray($module) Then
    MsgBox(0, "Success", "Success!")
Else
    MsgBox(0, "Failed", "Failed!")
EndIf

This is sensible because Autoit will support empty arrays with the next version.

My UDFs and Tutorials:

Spoiler

UDFs:
Active Directory (NEW 2022-02-19 - Version 1.6.1.0) - Download - General Help & Support - Example Scripts - Wiki
ExcelChart (2017-07-21 - Version 0.4.0.1) - Download - General Help & Support - Example Scripts
OutlookEX (2021-11-16 - Version 1.7.0.0) - Download - General Help & Support - Example Scripts - Wiki
OutlookEX_GUI (2021-04-13 - Version 1.4.0.0) - Download
Outlook Tools (2019-07-22 - Version 0.6.0.0) - Download - General Help & Support - Wiki
PowerPoint (2021-08-31 - Version 1.5.0.0) - Download - General Help & Support - Example Scripts - Wiki
Task Scheduler (NEW 2022-07-28 - Version 1.6.0.1) - Download - General Help & Support - Wiki

Standard UDFs:
Excel - Example Scripts - Wiki
Word - Wiki

Tutorials:
ADO - Wiki
WebDriver - Wiki

 

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:D

My UDFs and Tutorials:

Spoiler

UDFs:
Active Directory (NEW 2022-02-19 - Version 1.6.1.0) - Download - General Help & Support - Example Scripts - Wiki
ExcelChart (2017-07-21 - Version 0.4.0.1) - Download - General Help & Support - Example Scripts
OutlookEX (2021-11-16 - Version 1.7.0.0) - Download - General Help & Support - Example Scripts - Wiki
OutlookEX_GUI (2021-04-13 - Version 1.4.0.0) - Download
Outlook Tools (2019-07-22 - Version 0.6.0.0) - Download - General Help & Support - Wiki
PowerPoint (2021-08-31 - Version 1.5.0.0) - Download - General Help & Support - Example Scripts - Wiki
Task Scheduler (NEW 2022-07-28 - Version 1.6.0.1) - Download - General Help & Support - Wiki

Standard UDFs:
Excel - Example Scripts - Wiki
Word - Wiki

Tutorials:
ADO - Wiki
WebDriver - Wiki

 

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