what is "By Ref" and "ByVal"?

[yonemay]

pls tell me

[Vimalsoft Pty Ltd]

i want you to Say with me next time i will google before i post in a Forum here is what you are looking for in Google. http://www.google.co.za/search?hl=en&q=byref+and+byvalue&meta=[^] it will help

Vuyiswa Maseko, Sorrow is Better than Laughter, it may Sudden your Face, but It sharpens your Understanding VB.NET/SQL7/2000/2005 http://vuyiswamb.007ihost.com http://Ecadre.007ihost.com vuyiswam@tshwane.gov.za

[pmarfleet]

This question (and your other one) suggest that you haven't learnt the basics of the language yet. You shouldn't really ask questions like this in the forum. This information is freely available in the documentation[^]. I suggest you read it and learn the language fundamentals before posting again.

Paul Marfleet

[rohitsrivastava]

the actual value is stored in variable in by val and in byval reference is stored in the variable and actual data is stored in the heap

[Dave Kreskowiak]

Actually, you're answer is very wrong. You might want to Google it yourself too.

A guide to posting questions on CodeProject[^]
Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
     2006, 2007

[dBrong]

Every variable or literal is stored somewhere in memory. When you 'pass a variable by reference' the address of the actual variable is passed to the subroutine/function. You are working with the actual data value. Passing by reference is good for large data structures, and objects. Changing the values of 'by ref' parameters is sometimes called a 'side effect'. Normally one does not do this. When you 'pass by value' the runtime makes a copy of the variable. The subroutine receives the copy. Whatever changes the subroutine makes to the variable - will not affect the calling program, since the 'by value' copy will be discarded, when the subroutine returns. There is no way you can have the 'side effect'.