vb.net怎么加載和卸載窗體

VB.net 加載窗體 form2.show() 卸載窗體 me.close()加載窗體和VB沒啥區(qū)別，而卸載就截然不同了。附：VB 加載窗體 form2.show 卸載窗體 unload me

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求大神指點(diǎn)vb.net在類模塊里面寫個(gè)子程序和窗體,.當(dāng)調(diào)用這個(gè)子程序的時(shí)候怎么才能載入出窗體呢?

Public?Sub?載入窗體()?'在類中公有方法要明確Public

Dim?frm?As?New?Form1?'在Windows應(yīng)用程序項(xiàng)目中系統(tǒng)隱含生成了一個(gè)Form1類的同名對(duì)象，其實(shí)你直接引用的是隱含的Form1對(duì)象，而不是看得著的那個(gè)Form1窗口類。

'而在這種工程類型中列表中沒有列出來，應(yīng)該是沒有的，所以的用代碼生成Form1的實(shí)例。

frm.Show()

End?Sub

如何用VB.NET把執(zhí)行文件加到窗體中

加以一個(gè)panel用來顯示應(yīng)用程序的，就是放你那個(gè)easycap的，代碼如下

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

Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr

Private Declare Function SendMessage Lib "user32.dll" Alias "SendMessageA" (ByVal hwnd As Int32, ByVal wMsg As Int32, ByVal wParam As Int32, ByVal lParam As Int32) As Int32

Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Int32, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Int32) As Int32

Private Const WM_SYSCOMMAND As Int32 = H112

Private Const SC_MAXIMIZE As Int32 = HF030

Private Const SC_MINIMIZE As Int32 = HF020

Private Const SC_RESTORE As Int32 = HF120

Public Const SW_HIDE = 0

Public Const SW_SHOW = 5

Private Declare Function ShowWindow Lib "user32.dll" (ByVal hwnd As Int32, ByVal nCmdShow As Int32) As Int32

Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

ShellExecute(Me.Panel1.Handle, "open", "c:\windows\system32\cmd.exe", Nothing, ".", SW_HIDE)

System.Threading.Thread.Sleep(50)

Dim h As IntPtr = FindWindow(Nothing, "c:\windows\system32\cmd.exe")

ShowWindow(h, SW_HIDE)

SetParent(h, Me.Panel1.Handle) '嵌到panel1內(nèi)

SendMessage(h, WM_SYSCOMMAND, SC_MAXIMIZE, 0)

End Sub

把其中的c:\windows\system32\cmd.exe換成你要嵌入的應(yīng)用程序

如何給VB.NET窗體添加子窗體？

直接添加一個(gè)MID父窗體或在已有窗體的屬性中找到IsMDIContainer屬性，然后設(shè)置為True，然后創(chuàng)建第二個(gè)窗體 ，需要加載子窗體的時(shí)候：

Dim NewMDIChild As New Form2

NewMDIChild.MdiParent = Me

NewMDIChild.Show()

Public?Shared?Sub?CheckMDIChildForm(ByVal?MDIForm?As?Windows.Forms.Form,?ByVal?MDIChildForm?As?Windows.Forms.Form,?ByVal?MDIChildFormName?As?String)

If?MDIForm.MdiChildren.Length??1?Then

'如果沒有任何一個(gè)MDI子窗體，則創(chuàng)該MDI子窗體的窗體實(shí)例

Dim?MDIChildFrm?As?Windows.Forms.Form?=?MDIChildForm?'?定義MDI子窗體

MDIChildFrm.MdiParent?=?MDIForm?'指定父窗體

MDIChildFrm.Show()?'打開窗體

Exit?Sub

Else

Dim?x?As?Integer

Dim?frmyn?As?Boolean

For?x?=?0?To?(MDIForm.MdiChildren.Length)?-?1

Dim?tempChild?As?Windows.Forms.Form?=?CType(MDIForm.MdiChildren(x),?Windows.Forms.Form)

If?tempChild.Name?=?MDIChildFormName?Then

'檢測(cè)到有該MDI子窗體，設(shè)為激活?并退出循環(huán)

frmyn?=?True

tempChild.BringToFront()

Exit?For

Else

frmyn?=?False

End?If

Next

If?Not?frmyn?Then

'在打開的窗體中沒檢測(cè)到則新建

Dim?MDIChildFrm?As?Windows.Forms.Form?=?MDIChildForm?'?定義MDI子窗體

MDIChildFrm.MdiParent?=?MDIForm?'指定父窗體

MDIChildFrm.Show()?'打開窗體

End?If

End?If

End?Sub