VB Watch is a Visual Basic

Visual Basic

Visual Basic is the third-generation event-driven programming language and integrated development environment from Microsoft for its COM programming model...

 programming utility. VB Watch consists of three tools for Visual Basic 6.0: Profiler, Protector and Debugger.

Profiler

VB Watch Profiler measures the speed of a running Visual Basic program. It displays the time spent in each procedure and/or a line of code. This information can be used in code optimization to detect bottleneck procedures and lines. The Profiler can also be used to measure code coverage

Code coverage

Code coverage is a measure used in software testing. It describes the degree to which the source code of a program has been tested. It is a form of testing that inspects the code directly and is therefore a form of white box testing....

 during software testing.

Debugger

VB Watch Debugger monitors what happens inside a running Visual Basic program or library. It displays the call stack

Call stack

In computer science, a call stack is a stack data structure that stores information about the active subroutines of a computer program. This kind of stack is also known as an execution stack, control stack, run-time stack, or machine stack, and is often shortened to just "the stack"...

, execution trace, global variables and the number of live objects.
The Debugger also allows one to add breakpoints in executable files.