I've gone through and compiled a list of all standard include UDF's (as of version 3.3.0.0) that are missing @error checks after DLLCall's, where either the return 'array' or a passed structure is accessed after. It's a big list, so I wish you the best of luck in getting this worked out.

*ALSO another problem, many are using ANSI calls rather than Unicode (wide calls). I've marked down as much info regarding this as possible

Note: Some additional details are added for certain functions. Most are only 1 DLL Call, some are more - I commented on some, but there may be more than one DLLCall on some I didn't comment on.

<Clipboard.au3>
_ClipBoard_Close
_ClipBoard_CountFormats
_ClipBoard_Empty
_ClipBoard_EnumFormats
_ClipBoard_GetDataEx
_ClipBoard_GetFormatName: Additionally, the ANSI version is being called instead of the Unicode (wide) version
_ClipBoard_GetOpenWindow
_ClipBoard_GetOwner
_ClipBoard_GetPriorityFormat
_ClipBoard_GetSequenceNumber
_ClipBoard_GetViewer
_ClipBoard_IsFormatAvailable
_ClipBoard_Open
_ClipBoard_RegisterFormat
_ClipBoard_SetDataEx
_ClipBoard_SetViewer


<Date.au3>

_SetDate: DLLCalls: GetLocalTime (if @error, the next 2 DLLCall's should be avoided), & GetLastError
_SetTime: DLLCalls: GetLocalTime (if @error, the next 2 DLLCall's should be avoided), & GetLastError
_Date_Time_CompareFileTime
_Date_Time_DOSDateTimeToFileTime
_Date_Time_FileTimeToDOSDateTime
_Date_Time_FileTimeToLocalFileTime
_Date_Time_FileTimeToSystemTime
_Date_Time_GetFileTime
_Date_Time_GetLocalTime
_Date_Time_GetSystemTime
_Date_Time_GetSystemTimeAdjustment
_Date_Time_GetSystemTimeAsFileTime
_Date_Time_GetSystemTimes
_Date_Time_GetTickCount
_Date_Time_GetTimeZoneInformation
_Date_Time_LocalFileTimeToFileTime
_Date_Time_SetFileTime
_Date_Time_SetLocalTime: 2 unchecked calls to SetLocalTime
_Date_Time_SetSystemTime
_Date_Time_SetSystemTimeAdjustment
_Date_Time_SetTimeZoneInformation
_Date_Time_SystemTimeToFileTime
_Date_Time_SystemTimeToTzSpecificLocalTime
_Date_Time_TzSpecificLocalTimeToSystemTime


<EventLog.au3>

NOTE on most of these functions: the ANSI version of the function is being called. These should be updated to Unicode (wide) calls.

_EventLog__Backup
_EventLog__Clear
_EventLog__Close
_EventLog__Count
_EventLog__DeregisterSource
_EventLog__Full: returns value in a DLLStruct that wouldn't be touched if there was a DLLCall error
_EventLog__Notify
_EventLog__Oldest: returns value in a DLLStruct that wouldn't be touched if there was a DLLCall error
_EventLog__Open:
_EventLog__OpenBackup
_EventLog__Read: multiple unchecked ReadEventLogA calls
_EventLog__RegisterSource
_EventLog__Report


<File.au3>

_FilePrint: (should check for @error and Return 0 before other checks)

<GDIPlus.au3>

_GDIPlus_DrawImagePoints
_GDIPlus_GraphicsDrawImageRect


<GuiImageList.au3>

_GUIImageList_Add
_GUIImageList_AddMasked
_GUIImageList_BeginDrag
_GUIImageList_Copy
_GUIImageList_Create
_GUIImageList_Destroy
_GUIImageList_DragEnter
_GUIImageList_DragLeave
_GUIImageList_DragMove
_GUIImageList_DragShowNolock
_GUIImageList_Draw
_GUIImageList_DrawEx
_GUIImageList_Duplicate
_GUIImageList_GetBkColor
_GUIImageList_GetIcon
_GUIImageList_GetIconSizeEx
_GUIImageList_GetImageCount
_GUIImageList_GetImageInfoEx
_GUIImageList_Merge
_GUIImageList_Remove
_GUIImageList_Replace
_GUIImageList_ReplaceIcon
_GUIImageList_SetBkColor
_GUIImageList_SetDragCursorImage
_GUIImageList_SetIconSize
_GUIImageList_SetImageCount
_GUIImageList_SetOverlayImage
_GUIImageList_Swap


<GuiListView.au3>

_GUICtrlListView_Create
_GUICtrlListView_Draw
_GUICtrlListView_HitTest
_GUICtrlListView_InsertMarkHitTest


<GuiMenu.au3>

_GUICtrlMenu_AddMenuItem: actually, this looks like a coding error also, as it looks at the return as a non-array (and DLLCall doesn't explicitly say it returns anything for error situations)
_GUICtrlMenu_AppendMenu
_GUICtrlMenu_CheckMenuItem
_GUICtrlMenu_CheckRadioItem
_GUICtrlMenu_CreateMenu
_GUICtrlMenu_CreatePopup
_GUICtrlMenu_DeleteMenu
_GUICtrlMenu_DestroyMenu
_GUICtrlMenu_DrawMenuBar
_GUICtrlMenu_EnableMenuItem
_GUICtrlMenu_EndMenu
_GUICtrlMenu_GetItemCount
_GUICtrlMenu_GetItemInfo
_GUICtrlMenu_GetItemRectEx
_GUICtrlMenu_GetItemSubMenu
_GUICtrlMenu_GetItemText
_GUICtrlMenu_GetMenu
_GUICtrlMenu_GetMenuBarInfo
_GUICtrlMenu_GetMenuDefaultItem
_GUICtrlMenu_GetMenuInfo
_GUICtrlMenu_GetSystemMenu
_GUICtrlMenu_InsertMenuItem
_GUICtrlMenu_InsertMenuItemEx
_GUICtrlMenu_IsMenu
_GUICtrlMenu_LoadMenu
_GUICtrlMenu_MenuItemFromPoint
_GUICtrlMenu_RemoveMenu
_GUICtrlMenu_SetItemBitmaps
_GUICtrlMenu_SetItemInfo
_GUICtrlMenu_SetMenu
_GUICtrlMenu_SetMenuDefaultItem
_GUICtrlMenu_SetMenuInfo
_GUICtrlMenu_TrackPopupMenu

<GuiReBar.au3>

_GUICtrlRebar_HitTest

<GuiScrollBars.au3>

_GUIScrollBars_Init: 4 different DLL calls w/o error checks

<GuiStatusBar.au3>

_GUICtrlStatusBar_Create
_GUICtrlStatusBar_SetIcon


<GuiTreeView.au3>

_GUICtrlTreeView_GetImageListIconHandle
_GUICtrlTreeView_SetIcon: multiple unchecked DLL calls


<IE.au3>

__IEControlGetObjFromHWND


<Inet.au3>

_INetGetSource: only 1 call is unchecked: InternetReadFile

<Memory.au3>

_MemGlobalAlloc
_MemGlobalFree
_MemGlobalLock
_MemGlobalSize
_MemGlobalUnlock
_MemMoveMemory: while it doesn't access an array or structure, it's supposed to modify memory pointed to by passed parameters, so an @error + False return would make sense if the DLLCall failed
_MemVirtualAlloc
_MemVirtualAllocEx
_MemVirtualFree
_MemVirtualFreeEx

<Misc.au3>

_ChooseColor
_ChooseFont
_ClipPutFile: actually only 1 call (GetLastError) is fudged up - it doesn't check for @error, and accesses the returned value as a non-array variable
_MouseTrap
_Singleton: CreateMutex (array accessed after next DLL Call),& GetLastError
_MISC_GetDeviceCaps
_MISC_ReleaseDC

<NamedPipes.au3>

_NamedPipes_CallNamedPipe
_NamedPipes_ConnectNamedPipe
_NamedPipes_CreateNamedPipe
_NamedPipes_CreatePipe
_NamedPipes_DisconnectNamedPipe
_NamedPipes_GetNamedPipeHandleState
_NamedPipes_GetNamedPipeInfo
_NamedPipes_PeekNamedPipe
_NamedPipes_SetNamedPipeHandleState
_NamedPipes_TransactNamedPipe
_NamedPipes_WaitNamedPipe

<NetShare.au3>

_Net_Share_APIBufferFree
_Net_Share_ConnectionEnum
_Net_Share_FileClose
_Net_Share_FileEnum
_Net_Share_FileGetInfo
_Net_Share_SessionDel
_Net_Share_SessionEnum
_Net_Share_SessionGetInfo
_Net_Share_ShareAdd
_Net_Share_ShareCheck
_Net_Share_ShareDel
_Net_Share_ShareEnum
_Net_Share_ShareGetInfo
_Net_Share_ShareSetInfo
_Net_Share_StatisticsGetSvr
_Net_Share_StatisticsGetWrk

<Process.au3>

_ProcessGetPriority

<Security.au3>

_Security__AdjustTokenPrivileges
_Security__GetLengthSid
_Security__GetTokenInformation
_Security__ImpersonateSelf
_Security__IsValidSid
_Security__LookupAccountName
_Security__LookupAccountSid
_Security__LookupPrivilegeValue
_Security__OpenProcessToken
_Security__OpenThreadToken
_Security__SidToStringSid
_Security__StringSidToSid: actually, this looks like a coding error also, as it looks at the return as a non-array (and DLLCall doesn't explicitly say it returns anything for error situations)

<Timers.au3>

_Timer_GetIdleTime


<WinApi.au3>

_WinAPI_CloseHandle
_WinAPI_CopyIcon
_WinAPI_CreateBitmap
_WinAPI_CreateCompatibleBitmap
_WinAPI_CreateCompatibleDC
_WinAPI_CreateWindowEx
_WinAPI_DeleteDC
_WinAPI_DestroyIcon
_WinAPI_DrawIcon
_WinAPI_DrawIconEx
_WinAPI_ExpandEnvironmentStrings: also uses ANSI rather than Unicode (wide) variant
_WinAPI_GetClientRect
_WinAPI_GetCursorInfo
_WinAPI_GetDC
_WinAPI_GetDIBits
_WinAPI_GetIconInfo
_WinAPI_GetFileSizeEx
_WinAPI_GetModuleHandle
_WinAPI_GetObject
_WinAPI_GetOverlappedResult
_WinAPI_GetStdHandle
_WinAPI_GetTextExtentPoint32
_WinAPI_LoadBitmap
_WinAPI_LocalFree
_WinAPI_MessageBeep
_WinAPI_MulDiv
_WinAPI_OpenProcess: a few unchecked ones
_WinAPI_ReadFile
_WinAPI_ReadProcessMemory
_WinAPI_RegisterWindowMessage
_WinAPI_SetEvent
_WinAPI_SetHandleInformation
_WinAPI_SetProcessAffinityMask
_WinAPI_SetWindowPos
_WinAPI_WaitForInputIdle
_WinAPI_WaitForMultipleObjects
_WinAPI_WaitForSingleObject
_WinAPI_WriteConsole
_WinAPI_WriteFile
_WinAPI_WriteProcessMemory


<WinNet.au3>

NOTE on most of these functions: the ANSI version of the function is being called. These should be updated to Unicode (wide) calls.

_WinNet_AddConnection
_WinNet_AddConnection2
_WinNet_AddConnection3
_WinNet_CancelConnection
_WinNet_CancelConnection2
_WinNet_CloseEnum
_WinNet_ConnectionDialog
_WinNet_ConnectionDialog1
_WinNet_DisconnectDialog
_WinNet_DisconnectDialog1
_WinNet_EnumResource
_WinNet_GetConnection
_WinNet_GetConnectionPerformance
_WinNet_GetLastError
_WinNet_GetNetworkInformation
_WinNet_GetProviderName
_WinNet_GetResourceInformation
_WinNet_GetResourceParent
_WinNet_GetUniversalName
_WinNet_GetUser
_WinNet_OpenEnum
_WinNet_RestoreConnection
_WinNet_UseConnection


-----------------------------------------------------------
Additionally, the following DLL calls, which have proper @error handling, are using the ANSI call variants rather than Unicode (wide) DllCalls:
-----------------------------------------------------------

<Sound.au3>
__RandomStr


<WinAPI.au3>
_WinAPI_FormatMessage
_WinAPI_LoadLibrary
_WinAPI_LoadLibraryEx
_WinAPI_PostMessage
_WinAPI_SetDefaultPrinter
