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

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