总是显示在最前面

[machunfeng]

在VB中,怎么样使一个窗全总是显示在最前面,但可以对下面的窗体进行操作谢谢.

[suolan]

hehe

[icy_csdn]

form2.show 1

[suntingting]

这是网友的帖子
VB调用API函数使窗口保持在最上层
岳阳市鹰山石油化工总厂
周四阳
---- 我们看到有的应用程序不管窗口是否活动都使窗口保持在最上层，常见的Microsoft Word的文件打开和编辑查找窗口就是这样。在VB开发中可以通过调用SetWindowsPos()API函数实现这个功能。该函数声明如下：

Private Declare Function SetWindowPos
Lib "user32" (ByVal hwnd As Long, _
ByVal hWndInsertAfter As Long, ByVal
x As Long, ByVal y As Long, _
ByVal cx As Long, ByVal cy As Long,
ByVal wFlags As Long) As Long
---- hWnd变元是窗口的句柄；x，y是窗口的左上角的坐标；cx、cy是窗口宽度和高度；hWndInsertAfter变元是窗口清单中hWnd窗口前面的窗口句柄，有四个可选值：

序号 可 选 值 作 用
1 HWND_BOTTOM 把窗口放在窗口清单的底部
2 HWND_TOP 把窗口放在窗口清单的字符顺序的顶部
3 HWND_TOPMOST 把窗口放在窗口清单的顶部
4 HWND_NOTOPMOST 把窗口放在窗口清单的顶部，最上层窗口之下
---- WFlags变元为整型值，有八个可选值：

序号 可 选 值 作 用
1 SWP_DRAWFRAME 在窗口周围画一个方框
2 SWP_HIDEWINDOW 隐藏窗口
3 SWP_NOACTIVATE 不激活窗口
4 SWP_NOMOVE 保持窗口当前位置
5 SWP_NOREDRAW 窗口不自动重画
6 SWP_NOSIZE 保持窗口当前尺寸
7 SWP_NOZORDER 保持窗口在窗口清单中的当前位置
8 SWP_SHOWWINDOW 显示窗口
---- 下面的例子程序Test演示了对函数中的以上7个变元作正确的选择后，应用程序运行后窗口总可保持在最上层,程序清单如下：

Option Explicit
Private Declare Function SetWindowPos
Lib "user32" (ByVal hwnd As Long, _
ByVal hWndInsertAfter As Long,
ByVal x As Long, ByVal y As Long, _
ByVal cx As Long, ByVal cy As Long,
ByVal wFlags As Long) As Long
Private Const HWND_TOPMOST = -1
Private Const SWP_SHOWWINDOWS = &H40

Private Sub Form_Load()
Dim retValue As Long
retValue = SetWindowPos(Me.hwnd,
HWND_TOPMOST, Me.CurrentX, _
Me.CurrentY, 300, 300, SWP_SHOWWINDOWS)
End Sub
---- 备注：编写函数声明时，整个函数声明须在一行中写完，不可提行。一般是自动从系统中得到函数声明，方法是从VB的外接程序管理中启动“API 浏览”程序，在“API 浏览”程序中找到所需的函数声明，然后复制到VB代码中。

[icy_csdn]

不好意，不是！

[xxlroad]

'Always On Top.frm

VERSION 5.00
Begin VB.Form Form1
Caption = "Form1"
ClientHeight = 3195
ClientLeft = 60
ClientTop = 345
ClientWidth = 4680
LinkTopic = "Form1"
ScaleHeight = 3195
ScaleWidth = 4680
StartUpPosition = 3 'Windows Default
Begin VB.CommandButton Command3
Caption = "Command3"
Height = 495
Left = 3285
TabIndex = 2
Top = 2220
Width = 1215
End
Begin VB.CommandButton Command2
Caption = "Command2"
Height = 495
Left = 1755
TabIndex = 1
Top = 1500
Width = 1215
End
Begin VB.CommandButton Command1
Caption = "Command1"
Height = 495
Left = 1740
TabIndex = 0
Top = 765
Width = 1215
End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False

Private Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long

Const SWP_NOSIZE = &H1
Const SWP_NOMOVE = &H2
Const SWP_NOACTIVATE = &H10
Const HWND_TOPMOST = -1
Const HWND_NOTOPMOST = -2
Const SWP_SHOWWINDOW = &H40


Private Sub Command1_Click()
'使 窗 口 Always On Top用
SetWindowPos hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOACTIVATE Or SWP_SHOWWINDOW Or SWP_NOMOVE Or SWP_NOSIZE
End Sub

Private Sub Command2_Click()

'使 窗 口 取 消 Always On Top功 能 ， 用
SetWindowPos hwnd, HWND_NOTOPMOST, 0, 0, 0, 0, SWP_NOACTIVATE Or SWP_SHOWWINDOW Or SWP_NOMOVE Or SWP_NOSIZE
End Sub

Private Sub Command3_Click()
Form2.Show
End Sub

Private Sub Form_Load()
'使 窗 口 Always On Top用
SetWindowPos hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOACTIVATE Or SWP_SHOWWINDOW Or SWP_NOMOVE Or SWP_NOSIZE

End Sub



'Form2.frm
VERSION 5.00
Begin VB.Form Form2
Caption = "Form2"
ClientHeight = 3195
ClientLeft = 60
ClientTop = 345
ClientWidth = 4680
LinkTopic = "Form2"
ScaleHeight = 3195
ScaleWidth = 4680
StartUpPosition = 3 'Windows Default
Begin VB.TextBox Text1
Height = 675
Left = 1125
TabIndex = 0
Text = "Text1"
Top = 990
Width = 2100
End
End
Attribute VB_Name = "Form2"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False

[suolan]

Private Sub Form_Load()
Form2.Show , Me
End Sub