vb使用picturebox画曲线图

'添加个picture1和command1

Option Explicit Dim lngCenter As Long Dim lngMax As Long Dim lngPad& Dim PCurrent As POINT, PLast As POINT Private Type POINT x As Long y As Long End Type Private Sub Form_Load() lngCenter = (Picture1.Top + Picture1.Height) / 2 lngMax = Picture1.Height PLast.x = 0 PLast.y = lngCenter Dim i& For i = 0 To Picture1.Width Step 100 Picture1.Line (i, 0)-(i, Picture1.Height), &HFFC0C0 Next For i = 0 To Picture1.Height Step 100 Picture1.Line (0, i)-(Picture1.Width, i), &HFFC0C0 Next Picture1.DrawWidth = 1.5 Picture1.Line (0, lngCenter)-(Picture1.Width, lngCenter), vbBlue Picture1.DrawWidth = 1 End Sub Private Sub Timer1_Timer() PCurrent.x = PCurrent.x + 50 Randomize PCurrent.y = Rnd * lngMax Picture1.Line (PCurrent.x, PCurrent.y)-(PLast.x, PLast.y), vbRed PLast.x = PCurrent.x PLast.y = PCurrent.y End Sub Private Sub Command1_Click() Timer1.Enabled = Not Timer1.Enabled End Sub

效果图：

如果需要带有点规律性可以将获得y的坐标稍加处理下：

Private Function getRndY() As Integer
    Dim lngTmp%
   
    If intRnd = 0 Then
        Randomize
        intRnd = Rnd * 3 + 1
    End If
   
    Randomize
    lngTmp = Rnd * lngCenter
    If PLast.y > lngCenter Then
        getRndY = lngCenter + lngTmp
    Else
        getRndY = lngTmp
    End If
   
    intCurRnd = intCurRnd + 1
    If intCurRnd > intRnd Then
        Randomize
        intRnd = Rnd * 3 + 1
        getRndY = Rnd * lngMax
        intCurRnd = 0
    End If
End Function