What two methods are called from the ObjectContext object to inform MTS that the transaction was successful or unsuccessful?
SetComplete and SetAbort. Read more »
‘Visual Basic Interview Questions’ - KyaPoocha.com
What is the benefit of wrapping database calls into MTS transactions?
Aborting the transaction will undo and changes that occur within that transaction. This removes the possibility of stranded, or partial data. Read more »
Describe and In Process vs. Out of Process component. Which is faster?
An in-process component is implemented as a DLL, and runs in the same process space as its client app, enabling the most efficient communication between client and... Read more »
How would you declare and raise custom events in a class?
a) Public Event OnVarChange(); b) RaiseEvent OnVarChange[(arg1, arg2, … , argn)] Read more »
What is the difference between a Property Let and Property Set procedure?
Let - for simple variable Set - for object Read more »
What is the difference between ANSI and UNICODE strings when passed as arguments to a DLL?
ANSI - one byte for a char UNICODE - two bytes per char - works only on NT Read more »
What is the difference in passing values ByRef or ByVal to a procedure?
ByRef -pass the address (for string -address of address of first byte) BY REF IS VERY USEFULL When the contents itself are being modified, when there is large data.... Read more »
What is the purpose of the DoEvents command?
Fields execution so that the operating system can process other events. Returns number of open forms. Useful for things like ‘cancel search’ in Windows Read more »
Name and define the logical tiers in a traditional 3-tiered architecture?
Presentation logic - front end (HTML, Visual Basic forms) Business Logic - Applications and components that encapsulate business logic Data end - databases to store... Read more »
What is the difference between a PictureBox and Image control?
Image Control - Use this to display a picture. Use it over the PictureBox because it takes less operating system resources PictureBox- While it can display pictures,... Read more »
Under which circumstance does a VB application ignore a Timer event?
When the system is really busy doing something else and when DoEvents is being executed Read more »
What does the NewIndex property return?
Used to retrieve the index of the item most recently added to a ListBox or ComboBox control Read more »
What is the purpose of the ClipControls property on a form or container?
Returns or sets a value that determines whether graphics methods in Paint events repaint the entire object or only newly exposed areas. Also determines whether the... Read more »
What is the purpose of the AutoRedraw property on a form or container?
Setting AutoRedraw to True automatically redraws the output from these methods in a Form object or PictureBox control when, for example, the object is resized or... Read more »
Have you ever used Collections? Collection Classes?
A collection is a set of Repository objects that are all connected to a common source object via a relationship collection. A collection provides a way to connect... Read more »
Dim x, y as integer. What is x and y data type?
X as variant and y as integer. Read more »
What is the size of the variant data type?
The Variant data type has a numeric storage size of 16 bytes and can contain data up to the range of a Decimal, or a character storage size of 22 bytes (plus string... Read more »
What is the return type of Instr and Strcmp?
Instr – integer (Numeric position) Strcmp - integer ( if both the string are equal they result = 0) Strcmp (Str1, Str2, Comparetype) Comparing mode = 0 – Binary... Read more »
What is frx?
When some controls like grid and third party control placed in our application then it will create frx in run time. Read more »