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scope.txt
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06/12/98
READ.ME for SCOPE implementation
********************************
This package includes the following files:
******************************************
read.me you are just reading it
test.prg small test program to show the functionality
scope.ch just for the translation for usage of COMMANDs
makefile.mak for the usage of NMAKE (make utility)
scope.def this is the tricky file (do not delete it)
scope.prg this is the SCOPE <g>
makedll.bat for all of you who do not have NMAKE
project.xpj project file for the sample
test.dbf sample table
cl.bat MAKE batch for Clipper/Comix version
What leaves to tell?
********************
1. to build the project, please run
MakeDLL
or
nMake -f makefile.mak
first and then
PBuild
You should have a TEST.EXE then!
2. you can run TEST.EXE with or without a parameter:
TEST starts the app with NTX DBE
TEST CDX runs the app with CDX DBE; the Clipper app will
run as CDX version anyway
3. if you try to run the app against the Clipper app, you need to
make sure that the Clipper app built the CDX !!!
4. why does it work, but I did not change any code of my app, just
linked a LIB?
Have a look in SCOPE.DEF file. This shows a way, how you can
overload every Xbase++ function, which means you do replace the
origianal function of the Xbase++ runtime, just redirect the call
to the replacement and there you can even use the original call.
This works with eg. with the function Version()
VERSION = _VERSION
which results in the function _Version() of the DLL first
even when you call Version() in your app (Version() is mapped to
_Version() in your DLL; just call the app in the debugger to see
what is happening exactly).
VERY IMPORTANT NOTE: explaining and showing this feature to you
makes support of Xbase++ very difficult. So,
please do overload Version() when you use
this feature!!! Otherwise we can't do a good
support, because you overloaded a
functionality. THANKS!
Have fun with it,
Frank++
ALASKA TechSupport