Πέμπτη, 19 Ιουνίου 2014

Learn Visual Basic : Examples!

These pages collect example tutorials, programs and ActiveX controls displaying particular programming techniques in Visual Basic. 

Further Assistance

We cannot offer any further help with these examples. Most were developed by students who are no longer present. Our current students have moved onto programming in C#, and thus no longer use VB. Please do not contact us for further help, although feel free to tell us that this page was useful to you!

Other VB resources

Tutorials

These tutorials contain step by step graphical guides to several visual basic programming concepts and tools. Note that they are not necessarily in progressive order!
TutorialDescriptionAuthors
# 1Introduction to Visual Basic Part 1
  • A very basic demonstration and example of some controls and events
  • A simple example of how to program a listbox 
  • MSDN: what it is, how to get at it
  • MSDN sample programs online: how to get at'em
Mike Rounding
James Tam
# 2Introduction to Visual Basic Part 2.
  • Database example using the Data control
  • Saul's Sketchpad demo
  • Saul's Advanced Sketchpad demo
Mike Rounding
James Tam
Saul Greenberg
# 3Accessing databases using the ADO Data Control
Mike Rounding
James Tam
# 4Accessing databases using the Data Environment control
Mike Rounding
James Tam
# 5Creating a simple HelloWorld ActiveX control in Visual Basic
Saul Greenberg
# 6How to register your ActiveX Controls on the Computer Science machines
Mike Rounding 
# 7Building a Ticker ActiveX Control with the ActiveX Control Wizard
Mike Rounding
Rod Stephens
# 8Building a Transparent ActiveX Control that lets you click on a non-rectangular image
Mike Rounding
Shaun Kaasten
# 9Dynamic queries and databases: simple example on how you can use sliders  to build a query to a databaseMike Rounding
# 10The "Bitton" control, beginning guide to building ActiveX controls a few different ways along with some ActiveX explanationMike Rounding
# 11This program demonstrates dragging and dropping from explorer and between forms and also includes a cool control moving code module.Mike Rounding
Saul Greenberg
# 12This is a step-by-step tutorial for how to integrate Macromedia Flash into your VB applications. Complete with instructions on how to pass information back and forth and also how to remotely invoke Flash methods right in VB!Mike Hornby-Smith

Programs

Project DescriptionAuthors
vbHelloWorldA simple hello world program that illustrates a basic VB program as well as the command button and timer control.
Saul Greenberg
FirstProjectWe use this nonsense program as a first VB exercise for students to do.

The left figure shows when it looks like when the program is executed, while the right shows what happens after the user has clicked the button 3 times and selected the checkbox, and moved the mouse over the form. Try to program this yourself. It uses a command (or button), a label, and a checkbox. 
James Tam
vbImagesThese two vb Projects illustrates two ways to cycle through images stored in a local directory. Each demonstrates different controls for accessing files, while both show a control for displaying images.
Saul Greenberg
vbMarqueeA marquee (an automatically scrolling text region) is used to illustrate a Timer, a status bar and a checkbox control, and simple graphical repositioning,
Saul Greenberg
vbMoveListAn example of how to use listboxes (as well as how to put images into buttons). This example lets you move items between lists.
Rod Stephens, modified by Saul Greenberg
vbPlaysoundIllustrates how to play a wave file in Visual Basic. It works by declaring a function to the WIN32 API sndPlaySound .
Don't be intimidated: its two lines of code!
Saul Greenberg
vbSketchpadsIllustrates two simple sketchpads. The first one is only about 6 lines of code, and just illustrates some very basic graphics and event handling. The second shows how one can dynamically create controls at run time (the items on the palette), how controls can be positioned at runtime, and how controls can be resized when the window is resized. Its a longer program, but well worth going through to see how these features work.
See Tutorial 2 for step by step instructions for how these programs work.
Saul Greenberg
vbDrawpadA simple object-oriented drawing editor that allows a user to create, move and erase squares. You can easily extend this to include different graphical classes e.g., circles, lines, etc., or to any interactive graphics. The program illustrates
  • how to do simple object-based interactive graphics in VB
  • how to use a collection
  • how to use a class
Saul Greenberg
vbDynamicQueriesThis program is similar to the drawing editor above, but used for completely different purposes. It illustrates how to do dynamic queries on city attributes, where cities on a map are filtered immediately as a person moves a slider or checks a checkbox. While the example is simple, the possibilities of how you can enhance it are endless.
Click on the image to view it in full size.
Saul Greenberg
vbTableLensIllustrates how to create a very simple table lens that toggles cells between graphical and textual views.
Click on the image to view it in full size.
Rod Stephens
vbDragPictureIllustrates how to Bitblit a picture on another picture, and how to drag it around. 
Rod Stephens
vbDragTreeNodeIllustrates how to use the Tree control and how to drag items around different parts of the tree 
Rod Stephens
vbMoveControlsAn example application that lets a user interactively move different kinds of controls on a display.  Illustrates interactive graphics.
Saul Greenberg
vbclassexampleIllustrates how to create a simple class that raises events
Saul Greenberg
vbFlexdata-exampleIllustrates a database with the flex control. The database
just has two fields: name and phone. This example lets you add and remove records. To make the grid sorted, we set the data control's record source property to the SQL statment: Select * from friends order by FirstName. The record is just added to the end of the file, but the flex grid shows it sorted. See also Tutorial 3and Tutorial 4 for other ways to access databases.
Shaun Kaasten
vbShapedControlsIllustrates how you can clip the shape of a control or form to a variety of regions.
Shaun Kaasten


ActiveX Controls

ProjectDescriptionAuthor
HelloWorld A tutorial and example project that shows you how to build a minimalist VB ActiveX Control Component. It just contains a label saying "Hello World" and has no code attached to it. However, it does have a toolbox control icon. Includes an example program.  
Saul Greenberg
TickerTapeA tutorial and example project that shows you how to build a TickerTape control out of a label. It also illustrates the ActiveX Control Wizard. 
Mike Rounding
Rod Stephens
ElusiveProfessorA VB ActiveX Control that creates a 'new' type of button (actually a standard but augmented command button) that moves away from the person who is trying to click it. Includes an example program. The design was based upon a class project where students had to design a button that reflected their personality.
Saul Greenberg
FollowMeThis program creates a command button that will follow the mouse around.
This simple but very useful example illustrates
  • using the Extender object in a VB UserControl to access outside properties and methods
  • the use of calls from the Win32 API for finding mouse cursor coordinates
  • scaling those coordinates in terms of a container object (be it a form or another control container)
Michael Rounding
vbRangeSliderIllustrates a very crude range slider written in ActiveX. I include it to
  • show you how you can do interactive graphics (well, at least some simple stuff), 
  • how you can make an active x control that you can include in a project. 
It is limited. It does not scale its size, and I did not spend any time doing all the things that one normally does to package up a control. This is really just a quick hack. Feel free to improve it and pass it on to the class.
To use: Unzip the file into a directory. Check out the test program in a sub directory that I included. In your own project, you can include the range slider by going into  project/components and then selecting Browse. Navigate to the OCX file that will be in the unzipped directory and select it. You will see a new control that you can select.
Saul Greenberg
PictureClipA tutorial program that shows you how to use the PictureClip component for creating animations.
Dave Miller, 581 student
ShowNeighboursAn activeX control plus exe that shows you how to find the other controls in a form from inside an ActiveX control. Saul Greenberg used this example to build a Mr. Popularity button, where all the other controls on the form gravitate towards a Mr Popularity ActiveX button.
Chris Bradley, 581 student
xparent.zipIllustrates how you can build a transparent ActiveX Control that lets you detect clicks on a non-rectangular image (in the figure on the right these would be the red letters). See Tutorial 8
Mike Rounding,
Shaun Kaasten
tranparent.zipSimilar to xparent.zip, except this version follows your mouse wherever it goes around the screen - very fun. 
Mike Rounding,
MovingControl.zipThis example includes a user control that will move itself towards any other control. This example illustrates some custom events and properties in a user control, and shows how to do do simple control animation with a timer.
Mike Rounding




Third Party Examples

We've found these on the web or in books, and they are too good not to include
Project
(as zip or .bas)
DescriptionAuthor
animationBitmap Animation: Shows how to build a simple bitmap animation.
Rod Stephens
Transparent.zipTransparency: A tool library to do transparency, including transparent controls.
Doug Gaede
vbRangeTool.zipAn ActiveX control that implements a range slider. Looks pretty good!
Author unknown
VB-ScreenCapture.BASCapturing bitmaps: A BAS library for capturing various portions of a screen.
Microsoft website


Visual Basic Programming Examples by Saul Greenberg


Κυριακή, 28 Φεβρουαρίου 2010

How to play sounds with Visual Basic 6



Private Declare Function sndPlaySound Lib "winmm.dll" Alias "sndPlaySoundA" _
    (ByVal lpszSoundName As String, _
    ByVal uFlags As Long) As Long
    
    Private Const sndAsync = &H1
Private Const sndLoop = &H8
Private Const sndNoStop = &H10



Private Sub cmdplay_Click()
sndPlaySound "c:\R66an_1.wav", sndAsync
End Sub

With this program you can play a wav file from your hard disk 
In this example it is c:\R66an_1.wav
It works in VB6!