vb使用picturebox画曲线图

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 Option ExplicitDim lngCenter As LongDim lngMax As LongDim lngPad&Dim PCurrent As POINT, PLast As POINTPrivate Type POINT x As Long y As LongEnd TypePrivate 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 = 1End SubPrivate 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.yEnd SubPrivate Sub Command1_Click() Timer1.Enabled = Not Timer1.EnabledEnd 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 =