VB.NET如何让弹出的窗体显示在所有的窗体的最前面（包括其他程序打开的窗体）

你可以这样做，设置窗体的TopMost 属性为真！

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Me.TopMost = True

Form.TopMost 属性

获取或设置一个值，指示该窗体是否应显示为最顶层窗体。

急：vb.net设计的软件中，如何让主窗口置顶？

用SetWindowPos,参数TOP_MOST

就是直接设置窗口的TOPMOST属性也行啊，把默认的false改成true,自己在窗口的属性列表里找找吧

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.NET窗口置顶在最前面显示的时候不影响目前鼠标焦点.

这是一个关于模态窗口与非模态窗口的问题。

实现非模态窗口也没什么难度

Dim form As New Form1

form.TopMost = True

form.Show()

你再将鼠标移到父窗口上，弹出的窗口也不会消失。

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