vb.net中窗口至顶 vb如何让窗口置顶

VB 让窗口强行置顶

Option

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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

'

将窗口置于列表顶部，并位于任何最顶部窗口的前面

Private

Const

SWP_NOSIZE

=

H1

'

保持窗口大小

Private

Const

SWP_NOMOVE

=

H2

'

保持窗口位置

Private

Sub

Form_Load()

SetWindowPos

Me.hwnd,

HWND_TOPMOST,

0,

0,

0,

0,

SWP_NOMOVE

Or

SWP_NOSIZE

'

将窗口设为总在最前

End

Sub

'其实和楼上的一样,

不过这个置顶的是

加载的窗口,

你要置顶哪窗口就把代码放哪个里边

,另外MSGBOX

的置顶是4096

系统强制返回；全部应用程序都被挂起，直到用户对消息框作出响应才继续工作。

VB 窗口置顶

你说的是保持在最前面吧！你再说明白点！

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)

Private Sub Form_Load()

Call SetWindowPos(Me.hwnd, -1, 0, 0, 0, 0, 3)

'其它代码

End Sub

将下面的代码复制到记事本中，并将其保持为Form1.frm

VERSION 5.00

Begin VB.Form Form1

BorderStyle = 0 'None

ClientHeight = 4695

ClientLeft = 0

ClientTop = 0

ClientWidth = 6975

LinkTopic = "Form1"

ScaleHeight = 4695

ScaleWidth = 6975

ShowInTaskbar = 0 'False

StartUpPosition = 3 '窗口缺省

Begin VB.Shape Shape3

BackColor = H000080FF

BackStyle = 1 'Opaque

BorderStyle = 0 'Transparent

Height = 855

Left = 3480

Shape = 3 'Circle

Top = 960

Width = 975

End

Begin VB.Shape Shape2

BackColor = H000080FF

BackStyle = 1 'Opaque

BorderStyle = 0 'Transparent

Height = 855

Left = 1560

Shape = 3 'Circle

Top = 960

Width = 975

End

Begin VB.Shape Shape1

BackColor = H000080FF

BackStyle = 1 'Opaque

BorderStyle = 0 'Transparent

Height = 1095

Left = 1920

Shape = 2 'Oval

Top = 1320

Width = 2055

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)

Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As Long

Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long

Private Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As Long

Dim mouse_x As Single

Dim mouse_y As Single

Private Sub Form_Load()

Call SetWindowPos(Me.hwnd, -1, 0, 0, 0, 0, 3)

Me.BackColor = HFF0000

Dim rtn As Long

BorderStyler = 0

rtn = GetWindowLong(hwnd, -20)

rtn = rtn Or H80000

SetWindowLong hwnd, -20, rtn

SetLayeredWindowAttributes hwnd, HFF0000, 0, H1

End Sub

Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)

mouse_x = 0

mouse_y = 0

If Button = 1 Then

mouse_x = X

mouse_y = Y

End If

End Sub

Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)

If Button = 1 Then

Form1.Left = Form1.Left + (X - mouse_x)

Form1.Top = Form1.Top + (Y - mouse_y)

End If

End Sub

VB中如何让窗口置顶

新建立类模块：

Option Explicit

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)

窗口代码：

Dim rtn

'让窗口在顶层

rtn = SetWindowPos(Me.hwnd, -1, 0, 0, 0, 0, 3)

'取消窗口在顶层

'rtn = SetWindowPos(F_V.hwnd, -2, 0, 0, 0, 0, 3)

请问在VB中怎样使一个窗体运行时始终保持在最前?

这个简单啊，引用API函数SetWindowPos就可以解决。下面看看我的代码：

Private Declare Function SetWindowPos Lib "user32.dll" (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_NOMOVE = H2

Const SWP_NOSIZE = H1

Const FLAG = SWP_NOMOVE Or SWP_NOSIZE

Const HWND_TOPMOST = -1

Const HWND_NOTOPMOST = -2

Const HWND_TOP = 0

Const HWND_BOTTOM = 1

将窗口设置最前：Call SetWindowPos(Me.hwnd, HWND_TOPMOST, 0, 0, 0, 0, FLAG)

取消窗口的最前：Call SetWindowPos(Me.hwnd, HWND_NOTOPMOST, 0, 0, 0, 0, FLAG)

函数的第一个参数是根据实际情况改变的，它要求你给它传送一个窗口的句柄，这里的 Me.hwnd 就给函数传送了当前窗口的句柄，也就是将当前窗口前置或取消前置。如果要前置其他窗口，那么请向函数传送其他窗口的句柄，这个可以根据：FindWindow API函数获取。希望采纳意见，谢谢。。。