Sometimes you need to interface deep into the Windows operating system. Other times you need to do something Visual Basic doesn't have a built in function for. The Windows API allows you to do this. Visual Basic + API = some pretty amazing applications. Using VB and API can be a bit confusing at first, but once you understand it the sky is the limit as to what you can create.
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.
This VB6 tutorial teaches you how you can use Visual Basic coupled with the Win32 API to activate the main window of a program that is running. Very useful if you want to check if a program is running or if you want to bring another program to the forefront.
The Win32 API is a bit complex but very powerful. This tutorial shows you how to easily use the Windows API in a simple way. It explains the safety steps you need to take and how to write excellent API code.
The PlaySound API is a simple and very useful function that allows you to play any WAV file from within your Visual Basic application. This includes playing built in Windows sounds that are set through the control panel.
You can use the Windows API to move the mouse cursor around the screen. Learn how with this VB6 tutorial.
Visual Basic has a built in Shell command however it is very limited. This tutorial describes how you can use the Windows API functions to create a "Super Shell". This will allow you have more advanced program launching abilities.
Sub classing in Visual Basic is a very powerful concept. However, it fails when you try to implement it from within an ActiveX control. Learn how you can handle window sub classing from withing your active x controls with this tutorial.
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.
The Scroll Mouse (or intelli-mouse) has been around for a long time. Sometimes you might want to catch the scroll events in your application. You can do this with Windows API calls. Learn how in this VB6 tutorial.
WAV format is a very common format for sound files. You can not get all the information you might want directly using Visual Basic built in commands. However, by utilizing a few Windows API calls. This tutorial shows you how you can get extended WAV info such as the bit level and format.
You knew you could create database apps with VB6 but this tutorial walks you through how you can create a Visual Basic Screen Saver. The sky is the limit once you learn how to do this.
Many times you want your VB6 application to interact with other dlls and applications. This can occur if you want to use one of the functions that Microsoft wrote in their Windows API Dlls or if you want to call a function written in a different language such as c or c++. To do this you need to understand how VB6 handles API's this VB tutorial explains how.
Creating PDF documents in Visual Basic has always been a difficult task. Many times people have to purchase controls to do it for them. Not with this Visual Basic tutorial. PDF documents can be created in a snap using the mjwPDF class. This is the first in a series of tutorials. It covers the creation of a basic PDF document.
This explains how you can declare and call Windows API functions from within your program.
Games aren't much fun without collisions. Ships collide into astroids little mushrooms collide into mario. We must know how to detect these collisions - and it turns out to be pretty easy.
Have you ever wanted to display your program in the system tray (next to the clock). You can buy a control to do this or you can do it yourself using Windows API calls only.
A fun thing maybe a useful thing. See how in you can call a Windows API function in order to tell Windows to start the default screen saver.
The FlashWindow Win32 API call allows you to do some fun things. This tutorial shows you how to declare and call it from your app.
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