Hi Martin, thanks for your reply but I cannot understand.
What should I find in the registry ?
In my specific case the file ext is Jpg and it should be open with MSPAINT...
Thank you
Alessio
>Hi Alessio,
>
>Check if declare command edit in registry for extension's application...
>
>
>

>HKEY_CLASSES_ROOT
> .ext
>  (Default) = ProgID.ext.1
>

>
>HKEY_CLASSES_ROOT
>
>

>HKEY_CLASSES_ROOT
> ProgID.ext.1
>  shell
>   edit
>    command
>

>
>MartinJ
>
>
>>Hi there,
>>I developed an application in which I call the function
>>

>>Procedure CallExt
>>Parameters xfiletoOpen,xlocation
>>
>>DECLARE INTEGER ShellExecute IN SHELL32.DLL INTEGER nWinHandle,;
>>                                               STRING cOperation,;
>>                                               STRING cFileName,;
>>                                               STRING cParameters,;
>>                                               STRING cDirectory,;
>>                                               INTEGER nShowWindow
>>    result = ShellExecute(0, 'Edit', xFileToOpen , '', xLocation, 1)
>>>>
>>This works fine in Win XP but under a PC running with Win2000 it does not open the file as it was not, but it is, associated to any application.
>>
>>How can I get through this problem ?
>>Thank you all
>>Alessio