@extended (error handling)

[CartoonDragon]

Hello,

I've run in to a problem with DriveMapAdd sometimes failing with the Error=1 Extended=0 and the drive not mapping.

So to give the user a better error description i found the command  _WinAPI_FormatMessage which should give me wonderfull Windows messages, but it only returns a single letter.

I found a wouldbe working code sniplet i could change to fit my needs, how ever it doesn't work for me as it is and even when i change it so that it doesn't produce errors it still doesn't work.

It seems to have worked for the guy right here: '?do=embed' frameborder='0' data-embedContent>>

Unedited:

#include <WinAPI.au3>

$n = 53; Error code
MsgBox(64, "Test", _WinAPI_GetErrorMessage($n))

Func _WinAPI_GetErrorMessage($iErrorNum)
    Local $tText

    $tText = DllStructCreate("char Text[4096]")
    _WinAPI_FormatMessage($__WINAPCONSTANT_FORMAT_MESSAGE_FROM_SYSTEM, 0, $iErrorNum, 0, DllStructGetPtr($tText), 4096, 0)
    Return DllStructGetData($tText, "Text")
EndFunc  ;==>_WinAPI_GetErrorMessage

My attempt:

#include <WinAPI.au3>

Local Const $FORMAT_MESSAGE_FROM_SYSTEM = 0x00001000

$n = 53; Error code
MsgBox(64, "Test", _WinAPI_GetErrorMessage($n))

Func _WinAPI_GetErrorMessage($iErrorNum)
    Local $tText

    $tText = DllStructCreate("char Text[4096]")
    $ptext = DllStructGetPtr($tText)
    _WinAPI_FormatMessage($FORMAT_MESSAGE_FROM_SYSTEM, 0, $iErrorNum, 0, $ptext, 4096, 0)
    Return DllStructGetData($tText, "Text")
EndFunc  ;==>_WinAPI_GetErrorMessage

Any help would be greatly apprisiated

[BrewManNH]

How about this?
 

#include <WinAPIdiag.au3>

$n = 53; Error code
MsgBox(64, "Test", _WinAPI_GetErrorMessage($n))

[CartoonDragon]

That was simply beautiful, thanks a lot BrewManNH!