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--- swdev:dotnet:creating_com_library [2012/05/14 15:59]
smayr
+++ swdev:dotnet:creating_com_library [2012/05/16 12:40] (current)
smayr [Creating COM Library]
@@ Line 1: / Line 1: @@
 = Creating COM Library =
-Source: [[http://stackoverflow.com/questions/3360160/how-do-i-create-an-activex-com-in-c]]
+  * Create a new Class Library project (Eg: MyLib). Start VS2010 as administrator in order to register types and assemblies.
-  * Start VS2010 as administrator.
-  * Open a Class Library project (Eg: MyLib).
   * Interface:
-    * Add a new interface to the project (see example below).
+    * Add to the file:<code csharp>using System.Runtime.InteropServices;</code>
-    * Add a using ''System.Runtime.InteropServices;'' to the file.
+    * Add a new interface to the project:<code csharp>public interface IMyLauncher
-    * Add the attributes ''InterfaceType'', ''Guid'' to the interface.
+{
-    * You can generate a Guid using Tools > Generate GUID.
+   void launch();
+}</code>
+    * Add the attributes ''InterfaceType'', ''Guid'' to the interface. Generate a Guid using Tools > Generate GUID. <code csharp>
+[InterfaceType(ComInterfaceType.InterfaceIsDual)]
+[Guid("F207154F-C7E9-42B7-92BA-D6C4DA4D0A55")]</code>
   * Class:
-    * Add a class that implement the interface.
+    * Add a class that implement the interface.<code csharp>
-    * Add the attributes ''ClassInterface'', ''Guid'', ''ProgId'' to the interface.
+public class MyLauncher: IMyLauncher
+{
+    public void launch()
+    {
+    }
+}</code>
+    * Add the attributes ''ClassInterface'', ''Guid'', ''ProgId'' to the interface. Generate a Guid using Tools > Generate GUID. <code csharp>
+[ClassInterface(ClassInterfaceType.None)]
+[Guid("0BE40A98-FCAC-432D-B0B6-999B42A28E48")]
+[ProgId("MyLib.MyLauncher")]</code>
     * ''ProgId'' convention is ''{namespace}.{class}''
   * Activate COM and register it:
-    * In Project Properties (Alt-Tab) > Application > Assembly Information, check "Make Assembly COM-Visible". Alternatively, In the folder MyLib > Properties > AssemblyInfo, set ''ComVisible'' to true.
+    * In Project Properties (Alt-Enter) > Application > Assembly Information, check "Make Assembly COM-Visible". Alternatively, In the folder MyLib > Properties > AssemblyInfo, set ''ComVisible'' to true.
-    * In Project Properties (Alt-Tab) > Build > Output, and check "Register for COM interop".
+    * In Project Properties (Alt-Enter) > Build > Output, and check "Register for COM interop".
     * Build the project. This will register the COM object.
     * Alternatively, manually register COM object:<code>C:\>"%Windir%\Microsoft.NET\Framework\v4.0.30319\regasm.exe" /codebase MyLib.dll</code>
 Now the COM object is available to be called by its ''ProgID''.
+== Example ==
 Example class for COM:
 <code csharp>
@@ Line 64: / Line 74: @@
 Hello, World, from a COM object
 </code>
+== References ==
+  * [[http://stackoverflow.com/questions/3360160/how-do-i-create-an-activex-com-in-c]]
+  * [[http://www.codeproject.com/Articles/12673/Calling-Managed-NET-C-COM-Objects-from-Unmanaged-C]]