COM object registration role
If the COM component is loaded with file names and the component location or name changes, the client application will not access the component. File Names cannot provide different component versions on a system, thus causing a variety of product conflicts between different vendors.
COM handles this problem by using the location of the COM component in the system registry with the identifier ID. The ID of the COM component must be guaranteed to be unique to avoid conflicts with different products, and customers can access components without knowing the physical location of the component, which is the so-called component to the customer's transparency.
The COM class is registered under the HKEY_CLASES_ROOT / CLSID primary key. For each CLSID primary key, there is a subkey InprocServer32, the default value of this subkey is the file name of the DLL.
Components can be registered using the RegSver32 program. This program provides components entering the registry.
The DLL file can be registered using the following command:
Regsver32
In order to register an exe file, the command syntax is:
The registration file read by the registration COM component is Mycom.RGS
In this example, the structure of the registry is (red is CLSID, green is IID, blue is libid)
HKEY_CLASS_ROOT / CLSID / {Feb7BDEF-FB6F-446B-BE31-DF0A3AD391BA}
Default Mycom Class
/ InprocServer32
Default c: /myproj/debug/myproj.dll
Apartment ThreadingModel
/ Progid
Default myproj.mycom.1
/ Programable
/ Typelib
Default {FE651184-11DE-4D01-BD69-B07DDFA12D0C}
/ VersionIndependentProgid
Default myproj.mycom
HKEY_CLASS_ROOT / MyProj.mycom
/ CLSID
Default {FEB7BDEF-FB6F-446B-BE31-DF0A3AD391BA}
/ Curver
Default myproj.mycom.1
HKEY_CLASS_ROOT / MyProj.mycom.1
/ CLSID
Default {FEB7BDEF-FB6F-446B-BE31-DF0A3AD391BA}
HKEY_CLASS_ROOT / Interface / {65460F9C-3BAB-4055-885A-8ED59F5FA9B0}
Default Imycom
/ Proxystubclsid
/ Proxystubclsid32
/ Typelib
Default {FE651184-11DE-4D01-BD69-B07DDFA12D0C}
Version 1.0
HKEY_CLASS_ROOT / TYPELIB / {FE651184-11DE-4D01-BD69-B07DDFA12D0C}
/1.0
Default MyProj 1.0 Type Library
/ 1.0/0
/ 1.0/0/win32
Default c: /myproj/debug/myproj.dll
/1.0/flags
/ 1.0/helpdir
Default C: / myproj / debug /
Author Blog:
http://blog.9cbs.net/callzjy/
