Logon user is not working for others domain in c

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C

hi,
i using following code to check the login, its working with in the domain.

Example:

MY machine is registered under 'A' Domain. Then i can able to test the A Domain Users.
but i can't able to use this to test 'B' Domain Users.

LogonUser("B\\india", "B", "B*#123",LOGON32_LOGON_INTERACTIVE ,LOGON32_PROVIDER_DEFAULT,&phToken)

i tried like that also

LogonUser("india", "B", "B*#123",LOGON32_LOGON_INTERACTIVE  ,LOGON32_PROVIDER_DEFAULT,&phToken)

but if i try

LogonUser("test", "A", "A*#123",LOGON32_LOGON_INTERACTIVE  ,LOGON32_PROVIDER_DEFAULT,&phToken)

- its working fine.