跪求大神指点vb.net 怎么用api 在屏幕指定的位置 创建一个无边框的窗体呀?
我只会vb6.0
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创建窗体用CreateWindiw函数，注册窗体用RegisterWndClass函数
也可以用setwindiwlong函数直接把一个现有的窗口边框去掉
VB.NET如何实现无边框窗体拖动？ 如果能指定控件拖动更好 希望能有一点分析 使用VS2015
VB6.0写的，代码很简单，无意中写成的。应该可以参考。不需要任何api函数。在无边框窗体顶部中放入一个label标签。然后用label的 mouse down 和mouse move事件实现
Dim a, b As Single
Private Sub Label1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
a = X
b = Y
End Sub
Private Sub Label1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = 1 Then
Form1.Move Left + X - a, Top + Y - b
End If
End Sub
VB.NET鼠标拖动无边框窗体改变窗体大小
在VB中，BorderStyle属性为0的窗体没有边框，并且也没有与边框相关的元素。这种窗体具有简洁、占用空间少等优点，用它可以设计出某些富有个性的窗体。但是，由于它没有标题栏，窗体不能移动，同时也不能改变大小，在某些情况下会给使用者造成一定的麻烦。本文介绍在VB中如何用API函数操作无边框窗体。
移动窗体
新建一标准工程，设置Form1的BorderStyle属性为0。此时运行程序后，无法移动窗体。为能移动窗体，在Form1的代码窗口声明下列函数和常数：
Option Explicit
Private Declare Function ReleaseCapture Lib “user32” ()AsLong
Private Declare Function SendMessage Lib “user32”Alias“SendMessageA” (ByVal hwnd As Long, ByVal wMsg As Long,
ByVal wParam As Long, lParam As Any) As Long
Const WM_SYSCOMMAND = H112
Const SC_MOVE = HF012
在Form_MouseDown事件中输入以下代码：
Private Sub Form_MouseDown(Button As Integer, Shift As Integer,XAs Single, Y As Single)
按下鼠标左键
If Button = vbcenterButton Then
为当前的应用程序释放鼠标捕获
ReleaseCapture
移动窗体
SendMessage Me.hwnd, WM_SYSCOMMAND, SC_MOVE, 0
End If
End Sub
注意：此时窗体上不能放置除Shape控件以外的任何控件，否则，在被控件遮住的地方点按鼠标还是无法移动窗体。要使点按控件也能移动窗体，需再添加一个该控件的MouseDown事件过程，代码与上述过程代码相似。
改变窗体的大小
为了改变窗体的大小，需要添加一个Timer控件，以定时捕获鼠标在窗体中的位置。当鼠标位于窗体边缘时，改变鼠标的形状，以通知用户可以进行改变大小的操作。为此，将Timer控件的Interval属性设为100（即每过100毫秒检测一下鼠标位置），其他取默认值。
在Form1的代码窗口中再添加下列两个函数，并定义两个自定义变量和一个字符串变量：
取得窗体位置的函数
Private Declare Function GetWindowRect Lib “user32” (ByVal hwndAsLong, lpRect As RECT) As Long
取得鼠标位置的函数
Private Declare Function GetCursorPos Lib “user32” (lpPointAsPOINTAPI) As Long
鼠标位置变量
Private Type POINTAPI
x As Long
y As Long
End Type
窗体位置变量
Private Type RECT
center As Long
Top As Long
center As Long
Bottom As Long
End Type
所要执行的动作变量，是移动还是改变大小及从哪个方向改变大小
Dim Action As String
在Timer1控件的Timer事件过程中添加以下代码：
Private Sub Timer1_Timer()
Dim MyRect As RECT
Dim MyPoint As POINTAPI
MyRect返回当前窗口位置
Call GetWindowRect(Me.hwnd, MyRect)
MyPoint返回当前鼠标位置
Call GetCursorPos(MyPoint)
Select Case True
鼠标位于窗体左上方
Case MyPoint.x MyRect.center ＋ 5 And MyPoint.y ="" p=""
Screen.MousePointer = vbSizeNWSE
Action = “centerUp”
鼠标位于窗体右下方
Case MyPoint.x MyRect.center － 5 And MyPoint.yMyRect.Bottom － 5
Screen.MousePointer = vbSizeNWSE
Action = “centerDown”
鼠标位于窗体右上方
Case MyPoint.x MyRect.center － 5 And MyPoint.y="" p="" ＋=""
’45度双向鼠标指针
Screen.MousePointer = vbSizeNESW
Action = “centerUp”
鼠标位于窗体左下方
Case MyPoint.x MyRect.center ＋ 5 And MyPoint.yMyRect.Bottom － 5
Screen.MousePointer = vbSizeNESW
Action = “centerDown”
鼠标位于窗体左边
Case MyPoint.x MyRect.center ＋ 5
水平双向鼠标指针
Screen.MousePointer = vbSizeWE
Action = “center”
鼠标位于窗体右边热门推荐： C++程序设计之四书五经 谈谈JAVA程序的反编译1 2
MyRect.center － 5
Screen.MousePointer = vbSizeWE
Action = “center”
鼠标位于窗体上方
Case MyPoint.y MyRect.Top ＋ 5
垂直双向鼠标指针
Screen.MousePointer = vbSizeNS
Action = “Up”
鼠标位于窗体下方
Case MyPoint.y MyRect.Bottom － 5
Screen.MousePointer = vbSizeNS
Action = “Down”
鼠标位于窗体其他位置
Case Else
默认鼠标指针
Screen.MousePointer = 0
Action = “Move”
End Select
End Sub
当利用SendMessage函数由系统向窗口发送改变大小的信息时，只要将上面移动窗体的语句“SendMessageMe.hwnd,WM_SYSCOMMAND, SC_MOVE, 0”中的第3个参数改为相应的常数即可。
VB中HF001～HF008分别是从左、右、上、左上、右上、下、左下、右下8个方向改变窗体大小的常数。结合移动窗体的代码，将上述Form_MouseDown事件的代码综合如下（也可以把这8个常数声明为自定义常数）：
Private Sub Form_MouseDown(Button As Integer, Shift As Integer,xAs Single, y As Single)
按下鼠标左键
If Button = vbcenterButton Then
为当前的应用程序释放鼠标捕获
ReleaseCapture
Select Case Action
Case “center”
SendMessage Me.hwnd, WM_SYSCOMMAND, HF001, 0
Case “center”
SendMessage Me.hwnd, WM_SYSCOMMAND, HF002, 0
Case “Up”
SendMessage Me.hwnd, WM_SYSCOMMAND, HF003, 0
Case “centerUp”
SendMessage Me.hwnd, WM_SYSCOMMAND, HF004, 0
Case “centerUp”
SendMessage Me.hwnd, WM_SYSCOMMAND, HF005, 0
Case “Down”
SendMessage Me.hwnd, WM_SYSCOMMAND, HF006, 0
Case “centerDown”
SendMessage Me.hwnd, WM_SYSCOMMAND, HF007, 0
Case “centerDown”
SendMessage Me.hwnd, WM_SYSCOMMAND, HF008, 0
Case “Move”
SendMessage Me.hwnd, WM_SYSCOMMAND, SC_MOVE, 0
End Select
End If
End Sub
VB.net怎样按住鼠标移动无边框窗体
1.在mouse事件中实现
2.调用windows API
实现方式为：
1.在mouse事件中实现
[csharp] view plain copy
Point mouseOff;//鼠标移动位置变量
bool leftFlag;//标签是否为左键
private void groupControl1_MouseUp(object sender, MouseEventArgs e)
{
if (leftFlag)
{
leftFlag = false;//释放鼠标后标注为false;
}
}
private void groupControl1_MouseMove(object sender, MouseEventArgs e)
{
if (leftFlag)
{
Point mouseSet = Control.MousePosition;
mouseSet.Offset(mouseOff.X, mouseOff.Y); //设置移动后的位置
Location = mouseSet;
}
}
private void groupControl1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
mouseOff = new Point(-e.X, -e.Y); //得到变量的值
leftFlag = true; //点击左键按下时标注为true;
}
}
private void groupControl1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
mouseOff = new Point(-e.X, -e.Y); //得到变量的值
leftFlag = true; //点击左键按下时标注为true;
}
}
2.调用windows API
调用前需要添加using System.Runtime.InteropServices;
[csharp] view plain copy
[DllImport("user32.dll")]
public static extern bool ReleaseCapture();
[DllImport("user32.dll")]
public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
private void groupControl1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture(); //释放鼠标捕捉
//发送左键点击的消息至该窗体(标题栏)
SendMessage(Handle, 0xA1, 0x02, 0);
}
}
如何移动VB中的无边框窗体
1、无边框窗体也就是无标题栏窗体，对于这样的窗体移动需要编程实现。
2、vb有两种办法实现，一直接编程实现，二调用windows API编程实现。
3、这里示例直接编程实现：
Option Explicit
Dim BolIsMove As Boolean, MousX As Long, MousY As Long
Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = 1 Then BolIsMove = True
MousX = X
MousY = Y
End Sub
Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
Dim CurrX As Long, CurrY As Long
If BolIsMove Then
CurrX = Me.Left - MousX + X
CurrY = Me.Top - MousY + Y
Me.Move CurrX, CurrY
End If
End Sub
Private Sub Form_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
BolIsMove = False
End Sub
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