_WinAPI_RegEnumKey() Returns Incorrect @extended Value

[tukangusil7@…]

The current implementation of _WinAPI_RegEnumKey() returns $aCall[8] as @extended, which corresponds to the pointer to the FILETIME structure (lpftLastWriteTime), not the character count. The correct index for the character count (lpcchName output parameter) is $aCall[4].

This causes @extended to contain a large memory address (e.g., 1234567890) instead of a small integer representing the string length.

Current Code (Buggy)

Line
1	Func _WinAPI_RegEnumKey($hKey, $iIndex)
2	Local $tLastWriteTime = DllStructCreate($tagFILETIME)
3	Local $aCall = DllCall('advapi32.dll', 'long', 'RegEnumKeyExW', 'ulong_ptr', $hKey, 'dword', $iIndex, 'wstr', '', _
4	'dword*', 256, 'dword', 0, 'ptr', 0, 'ptr', 0, 'ptr', DllStructGetPtr($tLastWriteTime))
5	If @error Then Return SetError(@error, @extended, '')
6	If $aCall[0] Then Return SetError(10, $aCall[0], '')
7
8	Return SetExtended($aCall[8], $aCall[3]) ; Wrong: $aCall[8] is lpftLastWriteTime pointer
9	EndFunc ;==>_WinAPI_RegEnumKey

Proposed Fix

Line
1	Func _WinAPI_RegEnumKey($hKey, $iIndex)
2	Local $tLastWriteTime = DllStructCreate($tagFILETIME)
3	Local $aCall = DllCall('advapi32.dll', 'long', 'RegEnumKeyExW', 'ulong_ptr', $hKey, 'dword', $iIndex, 'wstr', '', _
4	'dword*', 256, 'dword', 0, 'ptr', 0, 'ptr', 0, 'ptr', DllStructGetPtr($tLastWriteTime))
5	If @error Then Return SetError(@error, @extended, '')
6	If $aCall[0] Then Return SetError(10, $aCall[0], '')
7
8	Return SetExtended($aCall[4], $aCall[3]) ; $aCall[4] is lpcchName (character count)
9	EndFunc ;==>_WinAPI_RegEnumKey

[Jpm]

See the example which is ok to retrieve the last time
for me no bug

[TukangUsil7]

Test_WinAPI_RegEnumKey

[anonymous]

I have added a test script.

[Jpm]

Where it is ?

[Jos]

Replying to Jpm:

Where it is ?

There is an attachment in the post above on the righthand side. :-)
​https://www.autoitscript.com/trac/autoit/attachment/ticket/4106/Test_WinAPI_RegEnumKey.au3

[Jpm]

As I said the example from the Help file is correct
The function is not suppose to return a count but a struct to the lasttime
No Bug