On 07/13/14 15:49, Shuai Meng wrote:

    You're not handling res==NULL case correctly. E.g. Call
    Abs("string") should fail.

I have tested this case for many times, and I think  Call Abs("string")
is just OK https://testbot.winehq.org/JobDetails.pl?Key=7967
and it's OK that write directly using vbscript on wiinxp and win7.

Abs should behave in the same way no matter it's return value is used or not. You have added following test:
Call Abs(-4)
it succeeds because -4 is a valid Abs argument. If you add this test:
Call Abs("string")
it will fail on windows.