Registering Controls and Servers :: COM and DDE Support (Windows Only) (External Interfaces)

External Interfaces

Registering Controls and Servers

Most controls and servers are registered by default. However, if you get a new .ocx, .dll, or other object file for the control or server, you must register the file manually.

Use the DOS regsvr32 command to register your object file (e.g., ocx file), in the Windows registry. From the DOS prompt, use the cd function to go to the directory where the ocx file is located and use the syntax

```
regsvr32 filename.ocx
```

For example, to register the mwsamp2.ocx file used in many of the MATLAB documentation examples, type

```
regsvr32 mwsamp2.ocx
```

If you encounter problems with this procedure, please consult a Windows manual or contact your local system administrator.

Verifying the Registration

Here are several ways to verify that a control or server is registered (using the MATLAB mwsamp control as an example):

Go to the Microsoft Visual C++ (MSVC) 6.0 tools menu and execute the ActiveX control test container. Click Edit, insert a new control, and select MwSamp Control. If you are able to insert the control without any problems, the control is successfully registered. Note that this method only works on controls.
Open the Registry Editor by typing regedit at the DOS prompt. You can then search for your control or server object by selecting Find from the Edit menu. It will likely be in the following structure:

```
  HKEY_CLASSES_ROOT/progid
```

Open OLEViewer from the MSVC 6.0 tools menu. Look in the following structure for your Control object:

  Object Classes : Grouped by Component Category : Control :
  Your_Control_Object_Name (i.e. Object Classes : Grouped by
  Component Category : Control : Mwsamp Control)

Supported Client/Server Configurations MATLAB COM Client Support