4. Introduction to composite UI Application Block (CAB) formshellapplication

Now let's take a look atCabApplicationProgramIs a very important class. This class can be considered asCabApplication startup point. He isFormshellapplication.

FormshellapplicationThe inheritance relationships are as follows:

This class requires two type parameters, one is inherited fromWorkitem(If you do not needWorkitemOfOnrunstartedMethod to achieve more processing, which can be directly used hereWorkitem),One is inherited fromForm.

Public Class Program:Formshellapplication<Myworkitem,Shellform>

NormallyMainCallRunMethod, runRunMethod initializes many application information. You can useOverrideTo rewrite or addFormshellapplication.

FormshellapplicationIncludingFormshellapplication) The following steps:

1. registerunhandledexceptionhandler

2.CreateBuild strategies

3.Create top-levelWorkitem

4.Create and initializeVisualizer

5.AddServices

6. CreateShell

CabThe standard services provided are as follows, which can be extended by developers:

ÜSimpleworkitemactivationservice

ÜFilecatalogmoduleenumerator

ÜWindowsprincipalauthenticationservice

ÜModuleloaderservice

ÜDataprotectioncryptographyservice

ÜTracesourcecatalogservice

ÜCommandadaptermapservice

ÜWorkitemextensionservice

ÜWorkitemtypecatalogservice

ÜControlactivationservice

ExecutedFormshellapplicationSubclassRunMethod,CabThe application is started. Then, execute the command according to your own needs.Workitem.