How do I find a specific textbox within a SSRS 2008 R2 Report

I have a large report that I built in Report Builder 3.0. The report consist of several tablexes and several (800 - 1000) textboxes. When I get an error in an expression, the system says I have an error in Textbox205 for example. Is there an easy way to find "Textbox205"?

What we called the special textbox that calculates value as the report is generated?

The textbox is called TextBoxSubTotal.

When using Visual Studio, at the top of the Properties window there is a drop down box with all the objects on your report in it. You can find and select the object in there.

One technique is to open the .rdl file in a text editor and Ctrl-F search for the text box name. This will take you to the xml attributes of the textbox, which usually allows you determine which textbox contains the problem.