什么“（test1，test2，test3 =”3“，test4 =”4“，test5 =”5“，test6 =”6“）”做什么？(What does “(test1, test2, test3=”3“, test4=”4“, test5 = ”5“, test6 = ”6“)” do?)

 委托定义了实施者必须使用的签名。 在您的情况下，您定义了一个方法，该方法将字符串作为输入参数并且什么都不返回。 为了使用它，您的实现方法必须与该签名一致。 例如，如果您希望它的行为类似于GreetingDelegate，则问候方法（顺便说一句，正确拼写您的方法）将需要如下所示： 
 
Public Sub Greeting(msgString As String)
   ' Do something with msgString
End Sub
 
 或者，如果您不需要输入字符串，您的委托可以声明如下，但是要意识到您定义此委托类型的所有方法也不允许输入字符串参数（因为它们不同意声明的签名）。 
 
Public Delegate Sub GreetingDelegate()

A delegate defines the signature that implementers must use. In your case, you defined a method that takes a string as input parameter and returned nothing. In order to use that, your implementing methods must agree with that signature. For example, a greeting method (BTW, spell your methods correctly), would need to be as follows if you want it to behave like a GreetingDelegate:
 
Public Sub Greeting(msgString As String)
   ' Do something with msgString
End Sub
 
Alternatively, if you don't need the input string, your delegate could be declared as follows, but realize that all methods that you are defining of this delegate type would also not allow input string parameters either (because they wouldn't agree with the declared signatures).
 
Public Delegate Sub GreetingDelegate()