| Prerequisites |
| This method is intended for Visual Basic 5 or Visual Basic
6 where the Common Control library used is the MSComCtl 5 version (comctl32.ocx). Because the VB6-specific mscomctl.ocx (Common Controls 6)
is a complete implementation of comctl32.dll and not reliant on the version of comctl32.dll installed, this routine may not work when applied
to a listview created from the VB6-specific mscomctl.ocx.
Enhanced Comctl32 functionality is only available to users with
comctl32.dll version 4.70 or greater installed. This dll is typically installed with IE3.x or greater. |
|
 The
methods presented here are a bit different. The first (Check1) causes the mouse cursor to change into a hand, and as it moves over the
ListView items, causes the item below to become underlined as a visual aid. This is similar to the visual clue in Internet Explorer when a
hyperlink is encountered.
The second (Check2) leaves the the mouse cursor as the standard pointer icon until an item is clicked.
As the cursor is moved over ListView the item below the cursor changes colour and becomes underlined when clicked. At
that point the cursor turns into the hand.
This example does not contain all code required to construct
the illustration shown. The routine provided here is designed to be applied to an existing project utilizing a ListView control with
subitems. |
|
| BAS
Module Code |
|
| Place the following code into the general declarations
area of a bas module: |
|
Option Explicit
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Copyright ©1996-2011 VBnet/Randy Birch, All Rights Reserved.
' Some pages may also contain other copyrights by the author.
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Distribution: You can freely use this code in your own
' applications, but you may not reproduce
' or publish this code on any web site,
' online service, or distribute as source
' on any media without express permission.
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Public Declare Function SendMessage Lib "user32" _
Alias "SendMessageA" _
(ByVal hwnd As Long, _
ByVal Msg As Long, _
ByVal wParam As Long, _
lParam As Any) As Long
Public Const LVM_FIRST As Long = &H1000
Public Const LVM_SETEXTENDEDLISTVIEWSTYLE As Long = (LVM_FIRST + 54)
Public Const LVM_GETEXTENDEDLISTVIEWSTYLE As Long = (LVM_FIRST + 55)
Public Const LVS_EX_FULLROWSELECT As Long = &H20
Public Const LVS_EX_GRIDLINES As Long = &H1
Public Const LVS_EX_CHECKBOXES As Long = &H4
Public Const LVS_EX_HEADERDRAGDROP As Long = &H10
Public Const LVS_EX_TRACKSELECT As Long = &H8
Public Const LVS_EX_ONECLICKACTIVATE As Long = &H40
Public Const LVS_EX_TWOCLICKACTIVATE As Long = &H80
|
|
| Form
Code |
|
| Add two check buttons to the project (Check1 and Check2)
with the captions "One Click Activate" and "Two Click Activate". Set both button's initial values to 0. Add the following
code to the check button sub: |
|
Option Explicit
Private Sub Check1_Click()
Dim state As Long
'state will be true when the checkbox
'style is 1 (checked) or False when
'unchecked
state = Check1.Value = 1
'set the new listview style
Call SendMessage(ListView1.hwnd, _
LVM_SETEXTENDEDLISTVIEWSTYLE, _
LVS_EX_ONECLICKACTIVATE, ByVal state)
End Sub
Private Sub Check2_Click()
Dim state As Long
'state will be true when the checkbox
'style is 1 (checked) or False when
'unchecked
state = Check2.Value = 1
'set the new listview style
Call SendMessage(ListView1.hwnd, _
LVM_SETEXTENDEDLISTVIEWSTYLE, _
LVS_EX_TWOCLICKACTIVATE, ByVal state)
End Sub
|
|
| Comments |
| Run your project. Selecting Check1 will cause the cursor
to assume the "web finger" pointer, and Check2 uses the default pointer. |
|
