Solved

Easy SetParent question

Posted on 2004-04-20
2
457 Views
Last Modified: 2008-03-04
I've done this before, but I can't remember how I got it working (and why it won't now). I want to set a form as a child of another form. I know I need to use the SetParent API, but it's like it doesn't see that line. My project is set up with frmMain and frmChannel. Here's the frmMain code:

Public Class frmMain
    Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "
' The standard stuff goes here, taken out to save space
#End Region

    Private Declare Function SetParent Lib "user32" Alias "SetParent" (ByVal hWndChild As Long, ByVal hWndNewParent As Long) As Long

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim objTest As New frmChannel
        SetParent(objTest.Handle.ToInt32, Me.Handle.ToInt32)
        objTest.Show()
    End Sub
End Class

According to http://www.allapi.net/ SetParent returns nonzero when it succeeds. When I used MsgBox to see what the output was, it was a really huge number (nonzero) but it didn't get set as a child. What am I doing wrong?

I'm using VB.NET 2003 in case you're wondering.
0
Comment
Question by:todd-
2 Comments
 
LVL 85

Accepted Solution

by:
Mike Tomlinson earned 25 total points
ID: 10873443
Your API declaration was for VB6.  Try this out instead:

Public Class Form1
    Inherits System.Windows.Forms.Form

    ' Region " Windows Form Designer generated code "

    Private Declare Function SetParent Lib "user32" Alias "SetParent" (ByVal hWndChild As IntPtr, ByVal hWndNewParent As IntPtr) As Long

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim f As New Form2
        SetParent(f.Handle, Me.Handle)
        f.Show()
    End Sub
End Class

Regards,

Idle_Mind
0
 
LVL 1

Author Comment

by:todd-
ID: 10873536
Very nice, thanks a lot :)
It's odd though, I remember last time copying and pasting the API straight from allapi.net and to get it to work together I just had to use .ToInt32.

Whatever, thanks all the same :D
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction While answering a recent question (http://www.experts-exchange.com/Q_27402310.html) in the VB classic zone, I wrote some VB code in the (Office) VBA environment, rather than fire up my older PC.  I didn't post completely correct code o…
This article describes some techniques which will make your VBA or Visual Basic Classic code easier to understand and maintain, whether by you, your replacement, or another Experts-Exchange expert.
As developers, we are not limited to the functions provided by the VBA language. In addition, we can call the functions that are part of the Windows operating system. These functions are part of the Windows API (Application Programming Interface). U…
This lesson covers basic error handling code in Microsoft Excel using VBA. This is the first lesson in a 3-part series that uses code to loop through an Excel spreadsheet in VBA and then fix errors, taking advantage of error handling code. This l…

713 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question