how to write a file

here we r dealing with write file
1)for that we need a call proces drag and drop a call process from palette process
2)dounble click on that call process and we will get two ends start and stop then click on file in palettes
3)then drag and drop write file and creat transagtion useing button
4)then click on write file and the given the file name in activity input
5)we can write what ever text in text content
or we can drag and drop content from the start
6) if we use file poler in the place of start
then when ever we made a a change in the file it will start the process