So in C#, creating a delegate looks something like “new deltype(objvar, method)”. NET perspective, creating a delegate involves invoking a constructor on the delegate class that takes an object instance (possibly Nothing for shared methods) and the address of a method. Interoperation Note: VB allows syntactic shortcuts when creating delegates. Combining delegates that have return types is possible, but the return value of the delegate invocation will be the return value of the last function invoked. This is necessary for events to work, as we’ll see below. When you combine two delegates (which must be of the same delegate type), invoking the resulting delegate will call both delegates in order of combination. The second special property is that delegates are combinable. In the case of an instance function, both the function address and object instance are stored, allowing for correct invocation of virtual functions. First, delegates allow you to take the address not only of shared methods but also of instance methods. For example: Delegate Function D1(ByVal intvar As Integer) As Integerįunction F1(ByVal intvar As Integer) As IntegerĬonsole.WriteLine(intval) ‘ Will print out “10”ĭelegates have two special properties. You can also use a delegate variable as if it was a subroutine or function to invoke the method pointed at by the delegate. Once you’ve captured the address of a method in a delegate, you can pass the delegate around as you can any object. Using the AddressOf operator, you can capture the address of a subroutine or function that matches that signature in a variable whose type is the delegate type. A delegate is defined by a subroutine or function signature. NET Framework is delegates, which can be thought of as type-safe function pointers. NET languages are built on the same foundation and are totally interoperable.
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Details may be different for other languages such as C#, but keep in mind that events in all. I though I would forward it along if anyone is interested. NET than it is in COM2, I wrote up an internal memo about how events work and specifically how they work in VB (since VB has a few extra shortcuts that languages like C# don’t).
![vb net 2010 time triggered event vb net 2010 time triggered event](https://i.ytimg.com/vi/Z4SQwEVwjJg/hqdefault.jpg)
Since the method of doing events is different in. So, the following is what I wrote, with some minor clarifications and corrections: (Wow, has it really been that long?) Then tomorrow or so, I’ll talk about what we’re doing new in VB 2005. Rather than write up a whole new, long entry, I think I’m just going to reprint an email that I sent to the alias nearly four years ago. Mike asked me what event properties are, but before I can really talk about them, you need to understand how events work in VB and.