In the breakpoint dialog, change the topmost cbo to "Break when expression is true", and enter the expression.

>I want to stop and call up the debugger when a certain expression is true. The only way I could think of was to put lcVar = "Value" in the watches and set a breakpoint. The problem is that the result of that expression keeps fluctuating between not being able to be evaluated and .F. as the scope changes. I don't want it to stop when this happens. I _only_ want it to stop when the expression is true.
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>It seems like this should be a simple thing, but I'm not seeing it.