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DevX - Software Development Resource

Make an Image Act as a Submit Button

Question: I’m trying to make a small image at the bottom of each form submit information from my database to the user when the user presses on it. However, I

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Receiving Duplicate E-mails

Question: I use Exchange 5.5 and Outlook 2000. Some users are getting duplicate Internet e-mails. I can’t find out why. Recipients in Exchange have only one SMTP address and one

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Clear Addresses in Netscape

Question: In Netscape, next to the address bar is an arrow pointing down. If you click on that arrow, it displays the previous 14 addresses. How can I prevent it

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SetVolume – Set the master volume level

Const MMSYSERR_NOERROR = 0Const MAXPNAMELEN = 32Const MIXER_LONG_NAME_CHARS = 64Const MIXER_SHORT_NAME_CHARS = 16Const MIXER_GETLINEINFOF_COMPONENTTYPE = &H3&Const MIXER_GETLINECONTROLSF_ONEBYTYPE = &H2&Const MIXER_SETCONTROLDETAILSF_VALUE = &H0&Const MIXERLINE_COMPONENTTYPE_DST_FIRST = &H0&Const MIXERLINE_COMPONENTTYPE_DST_SPEAKERS = &H4Const MIXERCONTROL_CONTROLTYPE_VOLUME =

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Create an Internet shortcut

Unlike regular LNK shortcut, which contain data in binary file, Internet shortcut files are just text files in this format: [InternetShortcut]URL=www.domain.com Thus it is simple to programmatically create an Internet

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Add multiple child controls to a Coolbar

The Coolbar control consists of a collection of Band objects, and each Band object exposes a Child property. To move a control inside the Coolbar you just have to assign

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Add size grips to a form

There are two simple ways to add the so-called size-grips to the bottom-right corner of a form. The first method is to add a StatusBar control, which includes a size-grip

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PlayAVIVideoOFF – Play only the audio track of an AVI file

Private Declare Function mciSendString Lib “winmm” Alias “mciSendStringA” _ (ByVal lpstrCommand As String, ByVal lpstrReturnString As String, _ ByVal uReturnLength As Long, ByVal hwndCallback As Long) As LongPrivate Declare Function

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PlayAVIAudioOFF – Play an AVI file without the audio track

Private Declare Function mciSendString Lib “winmm” Alias “mciSendStringA” _ (ByVal lpstrCommand As String, ByVal lpstrReturnString As String, _ ByVal uReturnLength As Long, ByVal hwndCallback As Long) As LongPrivate Declare Function

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GetMCIErrorString – Get a description of an MCI error

Private Declare Function mciGetErrorString Lib “winmm” Alias _ “mciGetErrorStringA” (ByVal dwError As Long, ByVal lpstrBuffer As String, _ ByVal uLength As Long) As Long’ Get the description of a MCI

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Change the DataSource at runtime

Visual Basic 6 is the first VB version that lets you programmatically change the DataSource property at runtime, for example to point to another ADO Data control or another ADO

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Create a System Tray icon

Sometimes is useful to add an icon in the Window taskbar’s status area (a.k.a. System Tray), to gain a better interaction between the user and your application. The only API

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PlayWAV – Play a WAV file

Const SND_ASYNC = &H1Private Declare Function PlaySound Lib “winmm.dll” Alias “PlaySoundA” (ByVal _ lpszName As String, ByVal hModule As Long, ByVal dwFlags As Long) As Long’ Play a WAV file.”

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PlayAVIPictureBox – Play an AVI file in a PictureBox

Const WS_CHILD = &H40000000Private Declare Function mciSendString Lib “winmm” Alias “mciSendStringA” _ (ByVal lpstrCommand As String, ByVal lpstrReturnString As String, _ ByVal uReturnLength As Long, ByVal hwndCallback As Long) As

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See Who Is Blocking Your SQL Server

If you have ever monitored any blocking problems in SQL Server, you know that sp_who only shows you the spid (SQL Server’s internal Process ID) that is causing the blocking

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Embed XSL in Behaviors

Browsers Targeted: Internet Explorer 5 Behaviors let you create specific functionality within custom HTML tags. XSL (Extensible Stylesheet Language) lets you transform a block of XML into some form of

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Grid Object Methods and Properties

Question: I have opened a table as a grid object. I want to go to a desired column (say 34) and the table has 62 fields. Currently only columns 1

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Popping Up a Form

Question: I have a form for which I do not want to give the user navigation privileges. I want the form to pop up at the record specified by a

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Insert XML Into Another XML Document

Question: Is there an easy and efficient way to insert an XML document into another XML template? The insertion point can be before, between, or after specified nodes. Answer: Sure.

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Deleting Datawindow Columns

Question: I am using a data store that has 13 columns with data in them. I want to destroy five of them. I know that there is a PB command

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Passing a Variable to a Compiled Program

Question: I am calling an .FXP from a batch file, but would like to pass a variable. Am I able to do this? How would FoxPro recognize it? Answer: You

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Resizing FoxPro’s Design Window

Question: How do I enlarge FoxPro’s design window? Answer: Here’s how: From the menu, choose Tools | Options. Click on the Forms page of the pageframe. You will see a

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Deleting a Record

Question: I am currently building a VB application that needs to delete records in a .dbf field. The connection to the database is established through ADO by using a DSN.

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Use Style Grouping for Leaner HTML

The HTML Style syntax lets you apply the same style attributes to a group of tags at the same time. You don’t need to define each tag’s styles separately. The

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How to Pop Up Message Boxes with ASP Code

It’s helpful during debugging to be able to print out values as the page is executing. Although this is generally done using Response.Write statements, it can also be done with