VBnet Code Library: Callback Routines Index

	VB5/VB6 Callback Routines Methods dealing with callbacks, enumeration and subclassing are for VB5/VB6 only. Updated Saturday March 31, 2001
Category	Topic
Browse for Folders vb6 vb5	Browse for Folders Callback Overview A discussion of the terms and requirements for providing the interface to a Browse for Folders callback routine. Pre-selecting a Folder using the Browse Callback Add a callback routine to your VB5 code to allow pre-selecting of a file system object when displaying the Browse for Folders dialog.

Dialogs vb6 vb5	Centering the Open & Save Common Dialogs Using Callbacks Add a Windows hook allowing centering of the dialog on-screen. June 07.2000 Centering the Open & Save Common Dialogs Using Callbacks, Advanced Extend the dialog centering code to include other positioning options. June 07.2000 Hooking the Open & Save Common Dialogs To Manipulate Components Find out how to change the captions of the dialog buttons and edit fields. June 07.2000 Modifying a Message Box with SetWindowsHookEx Add a system hook and manipulate message box settings, including button captions. Feb 06.2001 Creating a VB-Timed Message Box with SetWindowsHookEx Corrected - original February post contained code from the above method. Create a custom messagebox that counts down and self-closes. Mar 24.2001 Creating an API-Timed Message Box with SetWindowsHookEx Create a custom messagebox that counts down and self-closes without using a VB Timer control. Mar 24.2001

Locales vb6 vb5	Obtaining a User's System Calendar Information Use Enumeration callbacks to retrieve the month and days specific to the users locale. Aug 08.99 Changing the System Long and Short Date Formats with SetLocaleInfo Now assure that systems always have the desired short and long date formats set. Aug 08.99 Obtaining a User's Regional Locale Date Settings with EnumDateFormats Code to enumerate, via callbacks, the available locale time strings. May 16.99 Obtaining a User's Regional Locale Time Settings with EnumTimeFormats Code to enumerate, via callbacks, the available locale time strings. May 16.99 Retrieving a User's Regional Locale Date Settings Though not using callbacks, this obtains the national language locale settings for the user to retrieve strings representing times, dates, and other information. May 15.99

Display vb6 vb5	Enumerating the Available Display Resolutions Use this method to determine which resolutions a system supports. Sep 01.98 Changing the Display Resolution from Visual Basic Use this routine to change the current screen resolution or depth. Sep 01.98

Files vb6 vb5	Using CopyFileEx and Callback as a File Backup Mechanism Backup app for NT that uses the CopyProgressRoutine callback to track file copy progress. Dec 20.99

Fonts vb6 vb5	How to Enumerate the System Fonts using VB6/VB6 Based on the VB5 Help File example, this is the simplest code to enumerate the available Windows fonts using a callback and the Windows EnumFontFamilies API. Enumerating the System Fonts by Type Code to enumerate the available Windows fonts using a callback and the Windows EnumFontFamilies API, but populating the listbox only with fonts matching a desired type Enumerating the System Fonts with Preview This was just for fun ... code to enumerate the available Windows fonts using a callback and the Windows EnumFontFamilies API, populating the listbox with all fonts, and previewing the font at any size between 8 and 120 points. Populating a Font Menu and Splitting a Long Menu into Columns How to populate a Fonts menu and specify column breaks to assure it remains on-screen.

ListView vb6 vb5	Sorting ListView ListItems Using Callbacks Use the AddressOf operator to add extended sorting functionality to ListView columns. Updated Mar 01.2000

MessageBox vb6 vb5	Modifying a Message Box with SetWindowsHookEx Add a system hook and manipulate message box settings, including button captions. Feb 06.2001 Creating a VB-Timed Message Box with SetWindowsHookEx Corrected - original February post contained code from the above method. Create a custom messagebox that counts down and self-closes. Mar 24.2001 Creating an API-Timed Message Box with SetWindowsHookEx Create a custom messagebox that counts down and self-closes without using a VB Timer control. Mar 24.2001

System vb6 vb5	Enumerating the Installed and Supported System Locales Retrieve the codepage language names and abbreviations using the EnumSystemLocales callback. Nov 09.99

Windows vb6 vb5	Enumerating and Restoring Windows Using EnumWindows to obtain window information, and provide a means to restore the window regardless of its window position. Mar 01.2000 Enumerating Windows Using Callbacks Another Enumxxx API, this one enumerates system windows using AddressOf. June 17.98 EnumWindows and EnumChildWindows Callbacks Using EnumWindows and EnumChildWindows. Jan 26.2000 Modifying a Message Box with SetWindowsHookEx Add a system hook and manipulate message box settings, including button captions. Feb 06.2001