Question

vb编程，画直线

随即产生20条长度，颜色，宽度不同的直线。
如果属性里面要设置也请说一下。
谢谢。

Answer 1

窗体中添加一个Command1按钮，复制如下代码，点击命令按钮后，清屏然后随机画出20条线段

Private Sub Command1_Click()
Dim I As Integer, X1 As Integer, Y1 As Integer, X2 As Integer, Y2 As Integer
Dim ColorR As Long, ColorG As Long, ColorB As Long, DrawColor As Long
Randomize
Cls
ScaleMode = 3 ' 设置 ScaleMode 为像素
DrawMode = 13 '输出外观(前景色与背景色的操作方式)
DrawStyle = 0 '线条样式
'【0（缺省值）实线，1 虚线，2 点线，3 点划线，4 双点划线，5 无线，6 内收实线】
For I = 1 To 20
X1 = Rnd * Me.ScaleWidth
Y1 = Rnd * Me.ScaleHeight
X2 = Rnd * Me.ScaleWidth
Y2 = Rnd * Me.ScaleHeight
DrawWidth = Rnd * 10 + 1 '线条宽度，数值可选为1～32767，不过太大了就无法分辨了
ColorR = Rnd * 256
ColorG = Rnd * 256
ColorB = Rnd * 256
DrawColor = (((256 * ColorR) + ColorG) * 256) + ColorB
ForeColor = DrawColor
Line (X1, Y1)-(X2, Y2)
Next
End Sub

Answer 2

代码可以放在Timer里，每间隔一定时间就重新产生20条。
或放在Form_Click里，每次鼠标单击就能产生20条。

cls
randomize
for i = 1 to 20
x1=fix(rnd*form1.scalewidth)
y1=fix(rnd*form1.scaleheight)
x2=fix(rnd*form1.scalewidth)
y2=fix(rnd*form1.scaleheight)
r=fix(rnd*256)
g=fix(rnd*256)
b=fix(rnd*256)
line(x1,y1)-(x2,y2),rgb(r,g,b)
next i

Li.YQ@163.com