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直接添加一个MID父窗体或在已有窗体的属性中找到IsMDIContainer属性,然后设置为True,然后创建第二个窗体 ,需要加载子窗体的时候:
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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
'如果没有任何一个MDI子窗体,则创该MDI子窗体的窗体实例
Dim MDIChildFrm As Windows.Forms.Form = MDIChildForm ' 定义MDI子窗体
MDIChildFrm.MdiParent = MDIForm '指定父窗体
MDIChildFrm.Show() '打开窗体
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
'检测到有该MDI子窗体,设为激活 并退出循环
frmyn = True
tempChild.BringToFront()
Exit For
Else
frmyn = False
End If
Next
If Not frmyn Then
'在打开的窗体中没检测到则新建
Dim MDIChildFrm As Windows.Forms.Form = MDIChildForm ' 定义MDI子窗体
MDIChildFrm.MdiParent = MDIForm '指定父窗体
MDIChildFrm.Show() '打开窗体
End If
End If
End Sub
form2 窗体在vb.net中为类的形式存在,必须先定义该类的实例子方可引用.
dim f1 as new form2
f2.show
加以一个panel用来显示应用程序的,就是放你那个easycap的,代码如下
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内
SendMessage(h, WM_SYSCOMMAND, SC_MAXIMIZE, 0)
End Sub
把其中的c:\windows\system32\cmd.exe换成你要嵌入的应用程序
如果我没理解错:
Form1(下窗体) Form2(上窗体)
且已在Form1中声明了Form2
那不直接就可以在Form2中控制Form1的控件的值咯?
哦,明白了!
你是想不动Form2找到值后就高亮显示出来查询结果?
那还不简单,在Form2里边加上me.Topmast=True让Form2位于顶层
前提是你的Form1里的文本控件可实现选择效果,如RichTextBox,
在Form2中找到结果后写入 Form1.RichTextBox1.Select( start , Length),选则结果文本就可以高亮了,这样就实现了Form2 不关闭,且Form1 显示结果。
你这个要求实在是不对路子。是思路不对。
应该是将窗体一和窗体二中的控件分别用一个panel装起来,设为隐含状态。都放在主窗体的panel1中。
点击 窗体一时,第一个panel的Visible=True,第二个panel的Visible=False
点击 窗体二时,第一个panel的Visible=False,第二个panel的Visible=True
就达到你要的效果了。
窗体不能装来装去的。
再有一个方法就是创建自定义控件。那个说起来太麻烦,看看书吧。