Visual Basic Tutorial Part 4

myitcareer.org-Your IT Career Partner For Life. Please Bookmark It.
Homework Help | Buy Book | Buy Phone | Top Web Hosts | Hire Web Designer
Home | Interview Questions And Answers | Hosting Charges | Online Tuition
Top Domain Registrars | Hire Freelancer | Employee Provident Fund | Hindi News

AddressOf can only be used immediately preceding an

argument in an argument list; that argument can be the
name of a user-defined sub, function, or property.
·
The sub, function, or property you call with
AddressOf must be in the same project as the related
declarations and procedures.
·
You can only use AddressOf with user-defined subs,
functions, or properties -- you cannot use it with
external functions declared with the Declare
statement, or with functions referenced from type
libraries.
·
You can pass a function pointer to an argument that
is typed As Any or As Long in a declared Sub,
Function, or user-defined type definition.
Note You can create your own call-back function
prototypes in DLLs compiled with Visual C++ (or
similar tools). To work with AddressOf, your prototype
must use the __stdcall calling convention. The default
calling convention (_cdecl) will not work with


AddressOf



25. What is the difference between a Sub and a
Function?

Sub won't return values

Fuction return values



26. How will you retain the values of existing
elements in a dynamic array when you want to alter the
array size?

Redim with preserve keyword

27. How will you define a function to accept variable
number of arguments ?

USING PARAMARRAY
28. How will you define a function to accept optional
arguments?

Using optional key word
29. How does the following statements work? On Error
Goto Err_Handler


Next topic
Previous topic