Results for "Author: kamilche"

This is the complete code for a VB IDE addin that will add error handling to your procedure. Requires that you have a routine called "HandleError" in a public module accessible to all routines. Sample HandleError routine follows: Public Sub HandleError(ByVal CurrentModule As String, ByVal CurrentProcedure As String, _ ByVal ErrNum As Long, ByVal ErrDescription As String) On Error GoTo Err_Init MsgBox CurrentModule & " " & CurrentProcedure & ": " & ErrNum & " - " & ErrDescription Exit Sub Err_Init: MsgBox CurrentModule & " HandleError: " & Err.Number & " - " & Err.Description End Sub The best VB code handles errors in every routine - this makes the program very robust. However, there's no easy way to determine WHICH routine failed once you're inside of your global error handler 'HandleError'. Therefore, you must pass the routine name to the global error. This can be very tedious! :-O This addin adds an 'On Error Goto Err_Init' to the beginning of the routine, and an 'exit function', 'exit sub', or 'exit property' statement plus the error handling code at the bottom. To add error handling to a routine, place the cursor anywhere in the routine code, and choose 'Add Error Handling' from the 'Add-Ins' menu. The code this routine adds, looks like this: Exit (sub, function, or property here) Err_Init: HandleError CurrentModule, "(your routine name here)", Err.Number, Err.Description Note that it will automatically determine which sort of 'exit' statement is necessary, and what the name of the current procedure is, and pass the procedure name to the error handler.

Inspired by the 'Sparks' example entered by Itay Sagui, this demo shows how to display sparks flying out of your mouse, against a background picture, with a programmer-defined color.

Displays the number of days, hours, minutes, and seconds till a specified date. Allows you to enter multiple dates. Illustrates how to use the new ListView control in VB6, saving and retrieving from the registry, and the datediff function.

Prints out a 'table of contents' for your Visual Basic program, which contains method names, syntax, and comments only. Useful as 'cover sheets' for the actual code printout.

Inserts text files at desired spots in the code before compiling. Doesn't modify original source!

Start and kill a timer using API calls only! Useful when you need timers that can't be placed on a form.

A function that returns whether or not the shift key is currently down.

This example performs a quicksort on multiple keys, on an array of UDT's in memory.

Asynchronous Database Processing via Active EXE - When processing thousands of requests for a multi-user real-time application, you cannot afford to wait for the relatively slow database processing to occur. Here's the scenario: You have 1000 people already online and playing your multi-user game, and 10 people in the process of logging on right now. What do you do? You could process the logons right now, searching through thousands of user records, to load up their information - but then the game would appear to 'hang' for everyone already playing, waaaay bogus. You could process only 1 person at a time, in the main processing loop - that's better, but will add unnecessary slowdown to your program. What if you could log on the person in a BACKGROUND process, which wouldn't slow down the existing users? Ooh yeah. Or better yet, hand the request off to a machine across the network, dedicated to database processing? NOW we're talking! :-) You can do this easily, using Visual Basic ActiveX EXE's. Have fun with it!

Converts BMP to JPG 'on the fly' and lets you view the result on-screen. Source code for the DLL included.

Puts up a thumbnail size picture of all the pictures in a directory. Single clicking on a thumbnail takes you to a full size preview of that picture.

Displays which files were dragged from Windows Explorer (the desktop) to your form. Resolves shortcuts as well, so any shortcuts dropped on the form resolve into the actual file.

Load a Picture object from an array of bytes in memory. Can load any type of picture a normal picture box can load - GIF, JPG, or BMP. Doesn't require the intermediate 'saving of the byte array as a file on the hard drive' step, or an actual picturebox, to blit.

Control IE through VB! Use the WebBrowser control in VB, and automatically navigate to sites, click buttons, fill in text fields, and more. As an example, I've included the 'NeoPets Helper' I made for my young daughter. NeoPets is a gaming web site that lets you have virtual 'pets'. You play various NeoPets games to earn NeoPoints, so you can feed your pets. However, my daughter's NeoPets were always starving because she couldn't play their games well. :-( So, I made this program for her. Anyways! Don't look at it for the NeoPets tips, look at it for tips on how to control IE through VB! It shows you how to navigate to various sites, wait until they load, click buttons, do generic mouse clicks and drags, extract text from the web page, fill in text fields on the web page, do 'screen scraping', press keys, and more. Feel free to use this program however you wish - but DON'T give me any credit, I don't want to know what you use it for. :-D

A VB replacement for the old WebCam 2000 software, which no longer works under Windows 2000. It's a WebCam with a difference - it doesn't take the picture until a request comes in! This is good for lowering the hits on your CPU AND bandwidth, because it doesn't waste its time taking a picture and uploading it every 5 minutes like most WebCams do. It sits on port 2000, and when a request comes in, it grabs the picture via TWAIN, saves it as a JPG, and sends the picture to the person.

Shows how to use the Multimedia control that comes with VB, to record a WAV file using audio compression. No API's necessary!

A one-liner that resizes a picture to fit the dimensions of a picturebox. No API calls.

A simple video capture program, in only 44 lines of code. Now includes a button to change video size, and a button to change video source. For a more complete implementation, go to Ray Mercer's site at www.shrinkwrapvb.com

This one-line function returns whether or not a string consists of only the characters A-Z, a-z, and 0-9.

A simple program that plays notes and draws multicolored squares every time a baby smashes any key. Illustrates how to play notes and entire songs with the Beep API, how to force a window to the foreground even in Windows 2000, how to draw a random colored and sized rectangle, and how to 'appear' to disable the Windows key under Windows 2000 (where SystemParametersInfo doesn't work).