DOS: Command-Line Argument Validation

Question

Bear with me, it's been a while. :)

What is a good way to validate command-line arguments passed to an MS-DOS batch script?

For example, here is what I want to do:

IF "%1"=="" throw "Missing 1st argument: Machine Name"
IF "%2"=="" throw "Missing 2nd argument: File Path"

Answer 1

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IF %1.==. GOTO No1
IF %2.==. GOTO No2
... do stuff...
GOTO End1
:No1
ECHO No param 1
GOTO End1
:No2
ECHO No param 2
GOTO End1
:End1