>I am using visual vfp 6.0, i had complie the .exe and try it in windows ME version,
>Window ME got several HP printer HP LaserJet4050, HP LaserJet6PC, HP deskjet.
>When user preview report , the screen become blue and window error occur, then PC hangs later.
>I got such problem long time ago, (I use HP LaserJet4 printer driver to replace LaserJet4050) <-- It works before.
>However, today, in another client company. It didn't work anymore, ALL PC hangs.
>My client complain that vfp is not stable.
>Please help ~~ any solutions ?

Ask your customer to use MSFT printer drivers, HP's own printer drivers are extremely buggy, and are known to crash computers.