[fpc-devel] windows shlobj SIGDN longint

[Mattias Gaertner]

On 6/24/26 22:54, J. Gareth "Kit" Moreton via fpc-devel wrote:
> Hmmm, that's a little bit difficult.  What happens if you define the 
> constants as, say, "SIGDN_FILESYSPATH = longint($80058000);"?

Then it would compile.

But it seems the C code uses DWord, so why should FPC use longint?

Mattias

> 
> Gareth aka. Kit
> 
> On 24/06/2026 21:44, Mattias Gaertner via fpc-devel wrote:
>>
>>
>> On 6/24/26 22:35, J. Gareth "Kit" Moreton via fpc-devel wrote:
>>> I think it's deliberately designed that way so such codes are 
>>> negative numbers in signed 32-bit.
>>
>> I spotted it because code fails to compile with a range check error.
>>
>> Windows docs says these constants are from an enumeration.
>>
>> Mattias
>>
>>
>>> Gareth aka. Kit
>>>
>>> On 24/06/2026 20:51, Mattias Gaertner via fpc-devel wrote:
>>>> Hi,
>>>>
>>>> Unit shlobj has:
>>>>
>>>>       SIGDN      = longint;
>>>>
>>>> But the constants are for example:
>>>>
>>>> SIGDN_FILESYSPATH               = $80058000;
>>>>
>>>>
>>>> Maybe SIGDN must be DWord?
>>>>
>>>> Mattias
>>>>
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