vb.net鼠标拖动画

VB如何绘制鼠标拖动轨迹

Dim?xx?As?Double,?yy?As?Double

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

If?xx?=?0?And?yy?=?0?Then

xx?=?X:?yy?=?Y

Else

Form1.Line?(xx,?yy)-(X,?Y),?1

End?If

End?Sub

我调试成功的例子.

VB.net怎样按住鼠标移动无边框窗体

①在mouse事件中实现

实现方式为：

[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)

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

调用前需要添加using System.Runtime.InteropServices;

public static extern bool ReleaseCapture();

public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);

ReleaseCapture(); //释放鼠标捕捉

怎样用VB实现:用鼠标拖动绘制实圆与多种虚线圆

Dim

s

As

Boolean,

ci

Integer,

xianxing

xiankuan

Integer

x0

Single,

y0

Single

Private

Sub

Command1_Click()

=

True

Command1.Enabled

False

End

Form_Load()

b

Array("透明",

"实线",

"虚线",

"点线",

"点划线",

"双点划线")

Frame1.Move

①.00,

Frame1.Caption

"线型"

Width

-

"线宽"

For

i

To

Option1(i).Move

+

*

①.100,

Option1(i).Caption

b(i)

"点宽"

Next

Shape1(0).Visible

Shape1(1).Visible

Command1.Caption

"开始画圆"

Command1.ToolTipText

Form_MouseDown(Button

Shift

X

Y

Single)

If

And

Button

Then

Load

Shape1(ci)

Shape1(ci).Visible

Shape1(ci).BorderStyle

Shape1(ci).Move

x0,

y0,

0,

Shape1(ci).Shape

Shape1(ci).BorderWidth

Form_MouseMove(Button

banjing

Sqr((x0

X)

(x0

(y0

Y)

Y))

banjing,

Form_MouseUp(Button

Option1_Click(Index

Integer)

Option1(i)

界面稍微复杂了点：

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