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Format of environment block

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Offset Size Description

00h

N BYTEs

first environment variable, ASCIZ string of form "var=value"

N BYTEs

second environment variable, ASCIZ string

...

N BYTEs

last environment variable, ASCIZ string of form "var=value"

BYTE

00h

---DOS 3.0+ ---

WORD

number of strings following environment (normally 1)

N BYTEs

ASCIZ full pathname of program owning this environment other strings may follow