Please help...

I am using indirect addressing to change the Output of an IO Field using multiple buttons and Direct connection. var_1 or var_2 (dec value) --- IO Field output var_string (text tag).

I would like to do this using a single button and c script.

Thanks.

OK, we have a part of this... I suppose there is an I/O field which value is linked to internal string tag and "Indirect" is checked. So then the c-script which assigns the name of the tag can looks like:
// WINCC:TAGNAME_SECTION_START
#define Tag "DummyString" //name of thestring tag used for indirect addressing (probably internal)
// WINCC:TAGNAME_SECTION_END

SetTagChar(Tag,"DummyInt"); //"DummyInt" is the name of tag which value should go toI/O field

So this is direct setting,now the question is where is the name of tag? Then you can decide where to place the c-script and how to derive the name.

Regards
Sydney