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Arrays are passed by reference, not by value. Managed arrays are passed by reference, like any reference type, so this behavior is the same. Listing 5-29 shows how to use a managed array as a function parameter. Listing 5-29. Using an Array As a Parameter // arrays_parameter.cpp using namespace System; // using an array as an argument void set_to_one(int i, array<int>^ array_arg) { // Change the array inside this function. array_arg[i] = 1; } int main() { array<int>^ array1 = { 0, 1 }; set_to_one(0, array1); // The output here is " 1 1", indicating that the array // change is made to the same array. Console::WriteLine(" {0} {1}", array1[0], array1[1]); } Arrays may be used as return values just as any reference type.

Figure 10 2. Suspended service instances query 5. Order the query results on the Creation Time column by clicking the column header. You can compare the creation date with the timestamp of the error event log entry to determine if they relate to one another. Once you have found the appropriate suspended service instance in the query results list, double-click the row to launch the Service Details dialog box, as shown in Figure 10 3. The General tab of this dialog box includes high-level information regarding the suspended instance, including the BizTalk component that encountered the error, the service s status, and the instance ID. Knowing the particular component that encountered the error is a valuable and significant piece to the troubleshooting puzzle, as it assists in narrowing down where the fault occurred.

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Figure 10 3. General tab of the Service Details dialog box 7. Click the Error Information tab. As shown in Figure 10 4, this tab displays the text of the exception that the suspended service instance encountered, which is the same as what is written to the application event log. The error text usually includes key stack information, indicating at what level the fault occurred and how it was bubbled up through BizTalk. In our example, the instance was suspended because the send port was stopped.

Listing 1-1. Hello, World in Classic C++ // hello_world1.cpp int main() { System::Console::WriteLine("Hello, World!"); } The program in Listing 1-1 illustrates the classic Hello, World application. It shows several features from classic C++ a method call with a string argument, the qualification of a method name by the class and the namespace to which it belongs (with the usual double-colon scope operator), and the main method. It shows a few features new to the .NET Framework, such as the System namespace, the Console class, and the Console class s WriteLine method. You ll notice that there is no #include directive. Instead, managed type libraries in C++/CLI are referenced from their compiled form with #using. You could also write this program as shown in Listing 1-2. Listing 1-2. Hello, World in C++/CLI // hello_world2.cpp #using "mscorlib.dll" using namespace System; int main() { Console::WriteLine("Hello World!"); } The #using directive references the DLL file mscorlib.dll. The program also employs the using declaration in the classic C++ sense, which as you know is simply used to avoid having to use fully qualified names for program elements in the System namespace. The #using directive is a new C++/CLI concept used to reference the types contained in a DLL. This is very different from #include, which references types declared before compilation. The first example you saw works because the compiler automatically inserts #using "mscorlib.dll". This is convenient since nearly all CLI programs require the types that it defines. The DLL is a CLI assembly, which contains not just executable code but also metadata that exposes information about the types and program elements in the assembly. No header file is needed. Listing 1-3 illustrates a few more features of the language. Listing 1-3. More C++/CLI Features // hello_world3.cpp using namespace System; ref class Hello { String^ greeting;

Figure 10 4. Error Information tab of the Service Details dialog box 8. Click the Messages tab. As shown in Figure 10 5, the Messages tab displays a list of all messages related to the suspended service instance. From this tab, you can save the suspended message to a file for further inspection, turn on tracking for the message, or view additional details of the message (right-click the message for these capabilities).

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