The downloadable code is for a column called "TechTalk." Midrange Computing runs this column every month, and has for years. It presents short tips and techniques. You will only need the figures for RtvTrgCaller. You can ignore the rest of the code, because it was for other tips and techniques. The prototype is in Figure 3. Figure 1 is the source code for the procedure itself. Figure 4 is the example showing how to use it. If possible, it would be good to read the text that was published with the tip.

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