>its a 4gb pc (I know... only 3 are readed by the SO :) )
>its not memory related... its SO related
>
>the same code in a similar pc but with XP works... it even works well in a XP with 512mb
>OLEDrag works the same , but native Drag & Drop, sadely, no !
>
>nobody seen this in Vista and VFP (any version) ?

You shouldn't use VFP native Drag & Drop anyway.