calling function inside awk

Shell Programming and Scripting
1

Hi All,

My 1.txt contains some functions
fun1()
....
....

fun2()
....
....

I can call these fun from 2.txt inside awk as below
value="`fun1 "argument1"`"
awk 'BEGIN {printf ("%s", "'"$value"'")}'

I need to modify the above code so that without using the variable to store function return value, i can directly call the function inside the awk statement and print then and there.

Is this possible??

Can some one help me with this

Thanks in advance
JS

2 
awk 'BEGIN {printf ("%s", "'"`fun1 "argument1"`"'")}'
3

Thank you so much era !!!