Vb. NET Octopus Brother Production-How to troubleshoot MDI child forms overridden by controls in the parent form

Recently, a netizen asked me this question, I went online search, the result is very disappointed, there are several in the CSDN on the help post, see finally did not find a clear answer. Here I found on the Internet API function SetParent (), and the online error has been modified, and gave a simple example code. Readers can test themselves:

Public Class Form1    ' octopus brother, qq:3107073263 Group: 309816713          ' If you have any questions or good suggestions please contact me, everyone progress together     ' declaration setparent function, which is an API function    Declare Function SetParent Lib "user32" Alias "SetParent" (ByVal hwndchild as INTPTR, ByVal hwndnewparent as INTPTR) as Lo ng    Private Sub Form1_Load (ByVal sender as System.Object, ByVal e as System.EventArgs) Handles mybase.load        ME.ISMD IContainer = True ' sets Form1 to parent form container    End Sub    Private Sub button1_click (ByVal sender as System.Object, ByVal e as Syst Em. EventArgs) Handles Button1.Click        ' Form1 is the parent form, Form2 is a subform        SetParent (Form2.handle, Me.handle)        form2.show ( )    End Sub    Private Sub button2_click (ByVal sender as System.Object, ByVal e as System.EventArgs) Handles Button2. Click        SetParent (Form3.handle, Me.handle)        form3.show ()    End subend Class

Effect:

Vb. NET Octopus Brother Production-How to troubleshoot MDI child forms overridden by controls in the parent form