Q35275: Sample Program That Makes MS OS/2 Call to DosScanEnv Function

Article: Q35275
Product(s): See article
Version(s): 6.00 6.00b 7.00
Operating System(s): OS/2
Keyword(s): ENDUSER | | mspl13_basic
Last Modified: 31-JAN-1990

Below is a sample program that makes a call to the MS OS/2 function
DosScanEnv. This program can be compiled in Microsoft BASIC Compiler
Versions 6.00 and 6.00b for MS OS/2 and Microsoft BASIC Professional
Development System (PDS) Version 7.00 for MS OS/2.

'The declarations are in BSEDOSPC.BI
TYPE address
     offset AS INTEGER
     segment AS INTEGER
END TYPE

DECLARE FUNCTION DOSSCANENV%(_
        BYVAL P1s AS INTEGER,_
        BYVAL P1o AS INTEGER,_
        SEG P2 AS Address)

DEFINT a-z
DIM info AS address

INPUT "Enter the item to be searched for in the Environment Table : ";item$
item$=ucase$(item$)+chr$(0)

x=DosScanEnv%(varseg(item$),sadd(item$),info)

IF (x) THEN
   print "An error occurred.  The error number is ";x
ELSE
   counter=0
   def seg = info.segment
   do
     c$=chr$(peek(info.offset+counter))
     result$=result$+c$
     counter=counter+1
   loop while c$<>chr$(0)
   print item$;" = ";result$
END IF
END

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