Thank you very much Hilmar i tried it workde fine.

I have two .vcx classes the first one is genclass.vcx and the sencond one is general library.vcx.

i did for genclass.vcx it worked fine.

but when i did this for general class.vcx

set exclusive on
use general library.vcx

it gave me a message unrecognised phrase and char.
because there is a space between general and library .vcx
what should i do when there is a space in the name.vcx.

Thank you.