React to user mouse click

[frank]

I want to create a button for my desktop search screen that pastes a string into a search box.

But the search box is not always in the same place.

I know how to create buttons. I need to know how to react to the user mouse click so:

1. User clicks button
2. User clicks desired text box on search screen and a text string stored in the macro is pasted

I have the button created.

Now macro needs to:
Wait for user left click
Paste "text string" at the exact location the the left click was made.

Can you advise?
Thanks!