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Visual Basic Simple Functions Tutorials

Every complex program is made up of many, many, many simple functions. If you want to create a full application you must start by understanding some key simple Visual Basic functions. Once you understand these, you can put them all together to create the next killer VB6 app.

  • Level2

    Convert C Strings to VB Strings
    You will find times that you need to interact with other programs code through DLLs. These can be DLLs written by yourself or others. The most common time you do this is with the Windows API. This tutorial explains how you can convert C style strings like the Win32 API uses into VB strings.
  • Level1

    Error Handling In Visual Basic
    Errors happen. This is how programming works. Your goal is to handle runtime errors in a graceful way. At times this means simply displaying them to the end user in a pretty way. Other times you have to handle them yourself. Learn how with this Visual Basic tutorial.
  • Level1

    Event Programming In VB6
    Visual Basic allows you to easily create event driven applications. Depending on your background this might be very new for you to understand. This tutorial shows you exactly how to begin as an event driven programmer.
  • Level1

    Emulating C Macro Functions
    When interfacing with the Windows API from within Visual Basic you many times get return values that are made up of complex data types. C has built in functions to handle these but you need to write your own in VB6. Learn how with this Visual Basic tutorial.
  • Level1

    Understanding Subroutines and Functions in VB
    Subroutines and functions allow you to break your program up into smaller and more manageable chunks. You will use both of these many times when you develop VB applications you must learn them well.
  • Level1

    GoTo and GoSub in Visual Basic 6
    There is only one very important time to use the GoTo statement in error handling. You almost never need to use the GoSub function but this tutorial explains it in case you see it in other peoples code.
  • Level1

    Joining strings in VB6
    Many times when programming you will need to join strings together or a string with some other data type such as a currency or a number. This tutorial explains how to properly do this in Visual Basic 6 using the & (ampersand) or plus operator.
  • Level1

    Arithmetic in Visual Basic
    VB's arithmetic operators allow you to actually do things with numbers. You have all the basics (like you'd find on your calculator) plus many more advanced operators at your disposal.
  • Level1

    Assignments and Expressions In VB
    In VB assignments are very easy to use. However, this tutorial explains all the details of what VB does when you use the simple = statement and gives examples of valid and invalid assignments.
  • Level1

    A little more advanced Hello World program
    This is another program that says hello to the world. However, it uses a few more controls and says hello in a bit of a fancier way. Learn how to write a simple VB6 app using command buttons and label controls with this VB tutorial.
  • Level3

    Using the FSO (File System Object) in VB6
    The VB6 File System Object (FSO) allows you to do many things that aren't built into the normal VB commands. With the FSO you can do all sorts of file and folder manipulation, querying, reading, writing, and many many other things.
  • Level2

    Working with the File System in VB6
    Visual Basic has many built in functions that allow you to manipulate files, directories, and other file system properties. This VB tutorial shows how you can use these functions to manipulate and change Window's file system objects.
  • Level2

    Working with Random Access Files in VB
    Random Access files allow you to read from a specified area of the file with out having to read everything before it. This works great if you want to read the 50th record of your data with out reading all 49 records before it. Check out how to do this in this Random Access VB tutorial.
  • Level2

    Reading and Writing Binary Files In Visual Basic
    If a file doesn't have a standard text format you will need to read and write to it using VB's binary functions. This works well for files such as pictures, zip files, exe's, and other resource files that aren't just text. Learn how to manipulate binary files in this VB6 tutorial.
  • Level2

    Writing files in VB6 using Write and Print
    Many times you need to write data from your VB application to a file. This tutorial explains how you can use the Write # and Print # commands to write out your variables into a sequential file.
  • Level2

    Reading Fixed Width Files In VB6
    Many times you need to read a file that has each field a fixed width. This can be used to keep track of data (like a poor mans database) or if you are reading in a file that a different program printed out.
  • Level2

    Error handling in Visual Basic
    Once you start learning how to create even slightly complex VB programs you will inevitably need to implement some basic error handling. This allows you to capture errors and handle them in a graceful way instead of having your fancy Visual Basic application crash and burn.
  • Level2

    Understanding Array Sorting in Visual Basic Tutorial
    Many times, when programming, you need to know how to sort a bunch of items. One of the easiest ways to do this is to use an array and some of the built in VB6 functions. This Visual Basic tutorial shows you exactly how to do this!
  • Level2

    Searching Arrays in Visual Basic 6
    This VB6 tutorial explains how you can easily search an array in Visual Basic. It gives examples of both serial (or linear) searches and binary searches.
  • Level3

    Understanding VB6 Arrays (Advanced)
    This VB6 tutorial demonstrates how you can pass arrays to functions, how User Defined Type (UDT) arrays work, and how variant arrays work. It is a little more advanced then the beginner tutorial but is still very easy to follow.
  • Level2

    Understanding Repetition (Loops in VB)
    When writing a program you will often need to do something repeatedly. Visual Basic makes this very easy using different kinds of loops. This tutorial focuses on VB6's Do, While, and For loops.
  • Level2

    Learn if, else, and select statements in VB6
    Selection statements in VB6 allow you to branch based on conditions. Use the Visual Basic if, else, and select statements.
  • Level2

    Conditional expressions in Visual Basic Tutorial
    Understanding conditional statements are a necessity if you are going to write any sort of real world applications. This tutorial walks you through it.
  • Level2

    VB String Array Functions - Split, Join, Filter
    Visual Basic has a few built in string array functions including Split, Join, and Filter. This VB tutorial explains how to use them.
  • Level2

    Visual Basic 6 String Functions
    This tutorial explains all the main vb6 string functions that allow you to manipulate strings including the Len, Mid, Left, Right, UCase, LCase, Instr, InstrRev, String, Space, Replace, StrReverse, LTrim, RTrim, Trim, Asc, Chr, and the ASCII table. This Visual Basic tutorial should meet all your needs.
  • Level2

    Formatting Numbers, Currency, and Percents in VB
    This Visual Basic Tutorial explains how you can format Numbers, Currency, and percents using VB6 Format functions.
  • Level1

    Using the Format Function with Custom String Formats
    Custom string formatting can be accomplished in Visual Basic using specific characters recognized by the Format function. This VB6 tutorial explains how.
  • Level1

    Formating dates and times in VB6
    This VB6 tutorial explains how you can format dates and times using the Visual Basic format command.
  • Level1

    Understanding the VB Format Function with Custom Numeric Formats
    The VB6 Format function can be used to format numeric, date, time, and string data. This Visual Basic tutorial explains exactly how this can be done using Custom Numeric Formats.
  • Level1

    Understanding the VB Format Function with Named Formats
    The VB6 Format function can be used to format numeric, date, time, and string data. This Visual Basic tutorial explains exactly how this can be done using Named Formats.