dcsimg
Login | Register   
LinkedIn
Google+
Twitter
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.


Tip of the Day
Language: VB5,VB6
Expertise: Intermediate
Apr 28, 2001

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


ClearTreeViewNodes - Quickly delete all the nodes in a TreeView controls

Private Declare Function SendMessageLong Lib "user32" Alias "SendMessageA" _
    (ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, _
    ByVal lParam As Long) As Long
Private Const WM_SETREDRAW As Long = &HB
Private Const TV_FIRST As Long = &H1100
Private Const TVM_GETNEXTITEM As Long = (TV_FIRST + 10)
Private Const TVM_DELETEITEM As Long = (TV_FIRST + 1)
Private Const TVGN_ROOT As Long = &H0


' Quicky clear the treeview identified by the hWnd parameter
Sub ClearTreeViewNodes(ByVal hwnd As Long)
    Dim hItem As Long
    
    ' lock the window update to avoid flickering
    SendMessageLong hwnd, WM_SETREDRAW, False, &O0

    ' clear the treeview
    Do
        hItem = SendMessageLong(hwnd, TVM_GETNEXTITEM, TVGN_ROOT, 0)
        If hItem <= 0 Then Exit Do
        SendMessageLong hwnd, TVM_DELETEITEM, &O0, hItem
    Loop
    
    ' unlock the window
    SendMessageLong hwnd, WM_SETREDRAW, True, &O0
End Sub
Marco Bellinaso
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date