how to call a dll file's method use $zf function ?
i have looked for $zf function，it says $zf(-6) will work,but it doesn't work out actually,anybody can give me a dll file which will work with $zf,if you should show me the way making the dll that is best!thanks!
did you check $zf(-3,... $zf(-4,...., ........
https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=BGCL_dynamic
and
https://cedocs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=RCOS_fzf-4
also
https://cedocs.intersystems.com/latest/csp/docbook/Doc.View.cls?KEY=BGCL_library
$zf functions (3-6 to be precise) cannot call arbitrary libraries but only InterSystems IRIS callout libraries.
You need to write a C library which is an InterSystems IRIS callout library and which calls the dll you need. Here's documentation on that. And here's a sample callout library.
Another approach would be using the CNA community project to call your library. CNA provides an interface for using native C-compatible shared libraries.
it seems very complex，so far，i would like to use webservice
If you can grab a Caché distribution you will find in
%cachedir%\dev\cpp\ several samples and required sources
Here's a good callin/callout example repo.
You can also use the .NET Gateway to call a .NET DLL. This imports your .NET DLL into Cache and the functions are exposed as Cache Objects.
Look at %Net.Remote.ObjectGateway
thank you,i know this way，but it is not a good choice
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