Generate a screen print like "Print-Key"- Function

Hi all,

I was looking for a possibility to generate a screen print like "Print-Key"-
Function.
First I have made a screen print using the "Print-Key" on the keyboard. 
Then I have examined the resulting Spoolfile with the API  "Get Spooled File
"  (QSPGETF)
to find out the name of the program that opened the file.
I found QCLCLCPR in QSYS. I found this program also in the "System Entry
Point Table" and it's domain attribut is "*USER". 
My conclusion, it's an API and I can call it from my "User-State"-programs.
But there is no documentation in the API-Reference over it  and I don´t know
what kind of parameters I have to pass to this program. 

Does anyone know how to find out the attributes of the parameterlist for
such a program ?

Thanks in advance,
Michael Steibert, Germany
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