手写板串行通信检测程序概要.doc

手写板串行通信检测?Option Explicit ? ? ? Private Const WM_USER = H400 ? Private Const EM_SETTARGETDEVICE = (WM_USER + 72) ? ? ? Private Declare Function GetDC Lib user32 (ByVal hWnd As Long) As Long ? Private Declare Function SendMessage Lib user32 Alias SendMessageA _ ? (ByVal hWnd As Long, _ ? ByVal wMsg As Long, _ ? ByVal wParam As Long, _ ? lParam As Any) As Long ? ? ? Public Sub AutoSwitchLine(ByRef RichText As RichTextBox, ByVal bSwitch As Boolean) ? ? If bSwitch Then ? ? 设置 ? RichTextBox ? 自动换行 ? ? ? ? Call SendMessage(RichText.hWnd, EM_SETTARGETDEVICE, _ ? ? ? ? ? ? GetDC(RichText.hWnd), RichText.Width / 15) ? ? ? ? If RichText.RightMargin = 0 Then ? ? ? ? ? ? RichText.RightMargin = 1 ? ? ? ? Else ? ? ? ? ? ? RichText.RightMargin = 0 ? ? ? ? End If ? ? Else ? ? 设置 ? RichTextBox ? 不自动换行 ? ? ? ? Call SendMessage(RichText.hWnd, EM_SETTARGETDEVICE, 0, 1) ? ? End If ? End Sub ? Private Sub Form_Load() ?AutoSwitchLine RichTextBox1, True ? ? ?Dim i As Integer ? ? StatusBar1.Panels(2).Text = 日期：时间 Now ?初值赋给Combo_FontSize End Sub Private Sub MSComm1_OnComm() ? ? CommPort = 1 ? ? MSComm.Settings = 9600，N，8，1 ? ? MSComm.InBufferSize = 40 ? ? ? ? ?设置缓冲区接收数据为40字节 ? ? MSComm.InBufferCount = 0 ? ? MSComm.InputMode = comInputModeBinary ? 二进制方式 ? ? MSComm.InputLen = 0 ? ? ? ? ? ? ? ? ?每次读入缓冲区所有字符 ? ? MSComm.PortOpen = True ? ? ? ? ? 打开串口 End Sub Private Sub RichTextBox1_MouseMove(Button As Integer, Shift As Integer, x As Single, y As Single) StatusBar1.Panels(1).Text = x： x ，y： y ? ? 将光标（x，y）赋给状态栏的第1个窗格 End Sub Private Sub Timer1_Timer() StatusBar1.Panels(2).Text = 日期：时间 Now End Sub Private Sub Timer2_Timer() Dim InByte() As Byte ?If MSComm1.InBufferCount 0 Then ?判断串口是否有数据输入 ?InByte = MSComm1.Input ? ? ? ? ? ?将串口数据读取到InByte ?Dim j As Long ?Dim a As Integer ?Dim b As Integer ? For j = 0 To UBound(InByte) ? ? ? ? ? 循环到指针上标 ? ? ? ? ? ? a = (InByte(j) Mod 16) ? ?将读取的数据分解成十六进制数据显示 ? ? ? ? ? ? b = ((InByte(j) - a) / 16) ? ? ? ? ? ? ? ? Select Case b ? ? ? ? ?