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Article ID: 1073
Last updated: 05 Feb, 2008
Problem
Unable to access the global variable _servInst in zApp 3.x under Windows NT.
Cause
If the 16 bit version of the application does DDE communication, part of the DDE communication uses a zApp global variable called _servInst. This variable is declared in lastdefs.hpp. However, because Z_NTUSEDLL is defined instead of Z_USEDLL in the NT environment, _servInst is not declared.
Here is how _servInst is accessed for 16 bit:
Action
To access the global variable _servInst in zApp 3.x under Windows NT, modify two files as follows:
Unable to access the global variable _servInst in zApp 3.x under Windows NT.
Cause
If the 16 bit version of the application does DDE communication, part of the DDE communication uses a zApp global variable called _servInst. This variable is declared in lastdefs.hpp. However, because Z_NTUSEDLL is defined instead of Z_USEDLL in the NT environment, _servInst is not declared.
Here is how _servInst is accessed for 16 bit:
unsigned long abc;
zAppGetAppVar(_servInst); // to access the value of _servInst
zAppGetAppVar(_servInst) = abc; // to set the value of _serveInst to the value of abc
Action
To access the global variable _servInst in zApp 3.x under Windows NT, modify two files as follows:
- In ddeclass.cpp change the line that states:
unsigned long _servInst=0;
to:
Z_DLLVSPEC unsigned long Z_DLLVBSPEC _servInst=0;
- In defs.hpp add the following line:
extern Z_DLLVSPEC unsigned long Z_DLLVBSPEC _servInst;
after the line:
extern unsigned long debugFlags;
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Article ID: 1073
Last updated: 05 Feb, 2008
Revision: 1
Views: 3805
Posted: 22 Jan, 1998 by
Dean J.
Updated: 05 Feb, 2008 by
Dean J.
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