[python-win32] win32ui.CreateFileDialog error

[Tim Roberts]

Tim Roberts wrote:

>Tim Riley wrote:
>  
>
>>Can anyone explain to me why the following code will return a list if
>>I select 12 files but will return None if I select 13?
>>    
>>
>
>It's an ugly but well-known limitation: the buffer passed to
>CreateFileDialog is big, but not big enough.  When you select more files
>than will fit, the API returns an error, and the wrapper returns that
>error instead of reallocating and retrying.
>

Allow me to apologize to pywin32.  The problem is not in the pywin32
wrapper, the problem is in MFC.  Pywin32 uses the MFC CFileDialog class,
and that class has a hard-coded 256-byte buffer for the file names. 
Pywin32 cannot "reallocate and retry"; the interface is simply not exposed.

Roger Upole's advice is the best: use win32gui.GetOpenFileNameW.  It's
not quite as friendly, but it doesn't have the same limitation.

-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.