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[Last week | New and Improved Test Composer, Part I], we were talking about the latest version of the SAP Business One Test Composer (B1TC), the tool for setting up test automation for your add-ons. B1TC lets you record actions in SAP Business One and create a script, which you can later rerun to check if your add-on is working properly.  This week, I want to show you how to create custom operations for B1TC. Much of what I write about I also explain in a short {code:html}video{code}.  h3. Out-of-the-Box Operations B1TC lets you record B1 actions, and creates a script from the recording. Each line in the script is a different operation. For example, a line can simulate clicking on a button, opening a form, or selecting a menu item in the SAP Business One application. Within a script, you can double-click on a line and the Edit window is displayed. The Operation dropdown box, to the left, shows you all the existing operations.imageYou can create your own operation, for example, to create a backup of a DB2 database since B1TC has an operation for backing up a SQL Server database only. h3. How to Create Extension There are basically three steps in the process: * Register the DLL with B1TC. * Add the operation to a script. h4. Create DLL Create the code to be executed whenever the custom operation is added to a script. 1. Create a class library using Microsoft Visual Studio. 2. Create a method for each custom operation. This method is called whenever a running script executes a line with the custom operation.  The method must have the following signature (you can name the method as you like):  public static void methodName (System.Collections.ArrayList arr) { }image When the custom operation is added to a script, string parameters can also be specified. These strings are passed to the method in the ArrayList parameter.  3. Build the project to create a DLL. h4. Register DLL Let B1TC know about your DLL, and specify a name for the custom operation and the method to call when the operation is executed. 1.  In the main menu, select +Tools+ --> +Settings+.0.1.   In the +Advanced+ pane, click +Register External DLL+. The following is displayed: image 0.1.   Under +DLL List+, click +Add+ and select the DLL that contain the functions that define the operations. A reference to the DLL is added to the +References+ tree. image 0.1.  Register operations. For each operation, do the following: 1.  Under +Function List+, click +Add+.0.1.  Enter the name of the function to be executed for this operation, and then click +OK+. Enter an operation name, and click +OK+. image 0.1.   Click +OK+.  h4. Add Operation  Now add the operation to a script. 1.  In the script editor, right-click the line where you want to insert a custom operation, and select +Insert+* --> *+External Function+.0.1.   From the +Operation+ dropdown box, select a custom operation.0.1.  Add parameters for the operation, if needed. image

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