shutdown script for Oracle on NT

Hi all,
Hope you can make this clear. I am running Oracle 7.3.4 on NT and want to automate shutdown and restart Oracle to perform cold backup. I was told I could use the following, but I am not sure this will actually close my database for cold backup (I know it stops the Oracle Services). Please, if you have any suggestions, I would appreciate it.

Stop an instance
ORADIM73 -SHUTDOWN -SID sid [-USRPWD user_pwd] - SHUTTYPE SRVC, INST - SHUTMODE a, i, n

Start the instance
ORADIM73 -STARTUP -SID sid -PFILE filename [-USRPWD user_pwd] -STARTTYPE SRVC,INST

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