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--- swdev:dotnet:creating_com_library [2012/05/14 15:45]
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.
+  * Interface:
-  * Start VS2010 as administrator.
+    * Add to the file:<code csharp>using System.Runtime.InteropServices;</code>
-  * Open a Class Library project (Eg: MyProject).
+    * Add a new interface to the project:<code csharp>public interface IMyLauncher
-  * Add a new interface to the project (see example below).
+{
-  * Add a using ''System.Runtime.InteropServices;'' to the file.
+   void launch();
-  * Add the attributes ''InterfaceType'', ''Guid'' to the interface.
+}</code>
-  * You can generate a Guid using Tools > Generate GUID.
+    * Add the attributes ''InterfaceType'', ''Guid'' to the interface. Generate a Guid using Tools > Generate GUID. <code csharp>
-  * Add a class that implement the interface.
+[InterfaceType(ComInterfaceType.InterfaceIsDual)]
-  * Add the attributes ''ClassInterface'', ''Guid'', ''ProgId'' to the interface.
+[Guid("F207154F-C7E9-42B7-92BA-D6C4DA4D0A55")]</code>
-  * ''ProgId'' convention is ''{namespace}.{class}''
+  * Class:
-  * Under the prperties folder in the project in the asseblyInfo file set ''ComVisible'' to true.
+    * Add a class that implement the interface.<code csharp>
-  * In the project properties menu, in the build tab mark "Register for COM interop".
+public class MyLauncher: IMyLauncher
-  * Build the project.
+{
+    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-Enter) > Application > Assembly Information, check "Make Assembly COM-Visible". Alternatively, In the folder MyLib > Properties > AssemblyInfo, set ''ComVisible'' to true.
+    * 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 27: / Line 41: @@
 using System.Runtime.InteropServices;
-namespace Launcher
+namespace MyLib
 {
@@ Line 36: / Line 50: @@
     }
-    [ClassInterface(ClassInterfaceType.None), Guid("YYYYYYYY-YYYY-YYYY-YYYY-YYYYYYYYYYY"), ProgId("Launcher.MyLauncher")]
+    [ClassInterface(ClassInterfaceType.None), Guid("YYYYYYYY-YYYY-YYYY-YYYY-YYYYYYYYYYY"), ProgId("MyLib.MyLauncher")]
     public class MyLauncher: IMyLauncher
     {
@@ Line 53: / Line 67: @@
 Example how to call COM object using VB script:
 <code vb>
-set obj = createObject("PSLauncher.PSMyLauncher") obj.launch()
+set obj = createObject("PSMyLib.PSMyLauncher") obj.launch()
 </code>
@@ Line 60: / 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]]