form1.frm

电子教鞭,一个可以在电脑屏幕上画画,作批注的软件

VERSION 5.00
Begin VB.Form Form1 
   AutoRedraw      =   -1  'True
   BackColor       =   &H80000012&
   BorderStyle     =   4  'Fixed ToolWindow
   Caption         =   "happyteacher"
   ClientHeight    =   255
   ClientLeft      =   9330
   ClientTop       =   270
   ClientWidth     =   5535
   DrawWidth       =   5
   Icon            =   "Form1.frx":0000
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   17
   ScaleMode       =   3  'Pixel
   ScaleWidth      =   369
   ShowInTaskbar   =   0   'False
   Begin VB.CommandButton Command1 
      Caption         =   "smaller"
      Enabled         =   0   'False
      Height          =   255
      Left            =   720
      TabIndex        =   10
      Top             =   0
      Width           =   855
   End
   Begin VB.CommandButton Command2 
      Caption         =   "larger"
      Enabled         =   0   'False
      Height          =   255
      Left            =   1560
      TabIndex        =   9
      Top             =   0
      Width           =   735
   End
   Begin VB.CommandButton Command3 
      Caption         =   "<<"
      Enabled         =   0   'False
      Height          =   255
      Left            =   3000
      TabIndex        =   8
      Top             =   0
      Width           =   375
   End
   Begin VB.CommandButton Command4 
      Caption         =   ">>"
      Enabled         =   0   'False
      Height          =   255
      Left            =   4080
      TabIndex        =   7
      Top             =   0
      Width           =   375
   End
   Begin VB.CommandButton Command5 
      Caption         =   "^^"
      Enabled         =   0   'False
      Height          =   255
      Left            =   3360
      TabIndex        =   6
      Top             =   0
      Width           =   375
   End
   Begin VB.CommandButton Command6 
      Caption         =   "V"
      Enabled         =   0   'False
      Height          =   255
      Left            =   3720
      TabIndex        =   5
      Top             =   0
      Width           =   375
   End
   Begin VB.CommandButton Command7 
      Caption         =   "catch"
      Height          =   255
      Left            =   2280
      TabIndex        =   4
      Top             =   0
      Width           =   735
   End
   Begin VB.CommandButton Command9 
      Caption         =   "exit"
      Height          =   255
      Left            =   4440
      TabIndex        =   3
      Top             =   0
      Width           =   495
   End
   Begin VB.CommandButton Command8 
      Caption         =   "reset"
      Height          =   255
      Left            =   0
      TabIndex        =   2
      Top             =   0
      Width           =   735
   End
   Begin VB.CommandButton Command10 
      Caption         =   "save"
      Enabled         =   0   'False
      Height          =   255
      Left            =   4920
      TabIndex        =   1
      Top             =   0
      Width           =   615
   End
   Begin VB.PictureBox Picture1 
      AutoRedraw      =   -1  'True
      Height          =   11520
      Left            =   0
      ScaleHeight     =   764
      ScaleMode       =   3  'Pixel
      ScaleWidth      =   1020
      TabIndex        =   0
      TabStop         =   0   'False
      Top             =   120
      Visible         =   0   'False
      Width           =   15360
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Option Base 0

Private Type PALETTEENTRY
   peRed As Byte
   peGreen As Byte
   peBlue As Byte
   peFlags As Byte
End Type

Private Type LOGPALETTE
   palVersion As Integer
   palNumEntries As Integer
   palPalEntry(255) As PALETTEENTRY
End Type

Private Type GUID
   Data1 As Long
   Data2 As Integer
   Data3 As Integer
   Data4(7) As Byte
End Type

Private Const RASTERCAPS As Long = 38
Private Const RC_PALETTE As Long = &H100
Private Const SIZEPALETTE As Long = 104

Private Type RECT
   Left As Long
   Top As Long
   Right As Long
   Bottom As Long
End Type

Private Declare Function CreateCompatibleDC Lib "GDI32" (ByVal hDC As Long) As Long
Private Declare Function CreateCompatibleBitmap Lib "GDI32" (ByVal hDC As Long, _
        ByVal nWidth As Long, ByVal nHeight As Long) As Long
Private Declare Function GetDeviceCaps Lib "GDI32" (ByVal hDC As Long, ByVal _
        iCapabilitiy As Long) As Long
Private Declare Function GetSystemPaletteEntries Lib "GDI32" (ByVal hDC As Long, _
        ByVal wStartIndex As Long, ByVal wNumEntries As Long, lpPaletteEntries _
        As PALETTEENTRY) As Long
Private Declare Function CreatePalette Lib "GDI32" (lpLogPalette As LOGPALETTE) _
        As Long
Private Declare Function SelectObject Lib "GDI32" (ByVal hDC As Long, ByVal hObject _
        As Long) As Long
Private Declare Function BitBlt Lib "GDI32" (ByVal hDCDest As Long, ByVal XDest As _
        Long, ByVal YDest As Long, ByVal nWidth As Long, ByVal nHeight As Long, _
        ByVal hDCSrc As Long, ByVal XSrc As Long, ByVal YSrc As Long, ByVal dwRop _
        As Long) As Long
Private Declare Function DeleteDC Lib "GDI32" (ByVal hDC As Long) As Long
Private Declare Function GetForegroundWindow Lib "user32" () As Long
Private Declare Function SelectPalette Lib "GDI32" (ByVal hDC As Long, ByVal hPalette _
        As Long, ByVal bForceBackground As Long) As Long
Private Declare Function RealizePalette Lib "GDI32" (ByVal hDC As Long) As Long
Private Declare Function GetWindowDC Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function GetWindowRect Lib "user32" (ByVal hwnd As Long, lpRect As _
        RECT) As Long
Private Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hDC As _
        Long) As Long
Private Declare Function GetDesktopWindow Lib "user32" () As Long

Private Type PicBmp
   Size As Long
   Type As Long
   hBmp As Long
   hPal As Long
   Reserved As Long
End Type

Private Declare Function OleCreatePictureIndirect Lib "olepro32.dll" (PicDesc As _
        PicBmp, RefIID As GUID, ByVal fPictureOwnsHandle As Long, IPic As IPicture) As Long
Private Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long
Const HWND_TOPMOST = -1
Const SWP_SHOWWINDOW = &H40



Private Sub Command1_Click()
sw = sw * 1.5
sh = sh * 1.5
Form2.PaintPicture Picture1.Picture, tx, ty, tw, th, sx, sy, sw, sh
End Sub

Private Sub Command10_Click()
Form1.Hide


    '等待两秒钟
    Dim EndTime As Date
    EndTime = DateAdd("s", 1, Now)
    Do Until Now > EndTime
       DoEvents
       Loop
Set Picture1.Picture = CaptureScreen()
SavePicture Picture1, "c:\p" & Timer & ".bmp"
Form1.Show
End Sub

Private Sub Command2_Click()
sw = sw / 1.5
sh = sh / 1.5
Form2.PaintPicture Picture1.Picture, tx, ty, tw, th, sx, sy, sw, sh

End Sub

Private Sub Command3_Click()
sx = sx + 100

Form2.PaintPicture Picture1.Picture, tx, ty, tw, th, sx, sy, sw, sh
End Sub

Private Sub Command4_Click()
sx = sx - 100

Form2.PaintPicture Picture1.Picture, tx, ty, tw, th, sx, sy, sw, sh
End Sub

Private Sub Command5_Click()
sy = sy - 100

Form2.PaintPicture Picture1.Picture, tx, ty, tw, th, sx, sy, sw, sh
End Sub

Private Sub Command6_Click()
sy = sy + 100

Form2.PaintPicture Picture1.Picture, tx, ty, tw, th, sx, sy, sw, sh
End Sub

Private Sub Command7_Click()
Form1.Hide
Form2.Hide

    '等待两秒钟
    Dim EndTime As Date
    EndTime = DateAdd("s", 1, Now)
    Do Until Now > EndTime
       DoEvents
       Loop
  
Set Picture1.Picture = CaptureScreen()
'Form1.WindowState = 2
'Picture1.Picture = Clipboard.GetData()
tw = Form2.Width
th = Form2.Width
sw = Form2.Width
sh = Form2.Width
Form1.Show
Form2.Show
Form2.PaintPicture Picture1.Picture, 0, 0, Form2.Width, Form2.Height   ', 0, 0, sw, sh
Command1.Enabled = True
Command2.Enabled = True
Command3.Enabled = True
Command4.Enabled = True
Command5.Enabled = True
Command6.Enabled = True
Command7.Enabled = True
Command10.Enabled = True
End Sub

Private Sub Command8_Click()
Form1.WindowState = 0
Form2.Hide
End Sub

Private Sub Command9_Click()
End
End Sub

Private Sub Form_Load()
SetWindowPos Me.hwnd, HWND_TOPMOST, Me.Left \ 15, Me.Top \ 15, _
Me.Width \ 15, Me.Height \ 15, SWP_SHOWWINDOW


End Sub

Private Sub Form_MouseDown(Button As Integer, Shift As Integer, x As Single, y As Single)
If Button = 1 Then
x0 = x
y0 = y
f = True
End If
End Sub

Private Sub Form_MouseMove(Button As Integer, Shift As Integer, x As Single, y As Single)
If f = True And Button = 1 Then
Form1.Line (x0, y0)-(x, y), vbRed

x0 = x
y0 = y
End If
End Sub

Private Sub Form_MouseUp(Button As Integer, Shift As Integer, x As Single, y As Single)
If Button = 1 Then
f = False
End If
End Sub

Public Function CreateBitmapPicture(ByVal hBmp As Long, ByVal hPal As Long) As Picture
  Dim r As Long

   Dim Pic As PicBmp
   Dim IPic As IPicture
   Dim IID_IDispatch As GUID

   '填充IDispatch界面
   With IID_IDispatch
      .Data1 = &H20400
      .Data4(0) = &HC0
      .Data4(7) = &H46
   End With

   '填充Pic
   With Pic
      .Size = Len(Pic)          ' Pic结构长度
      .Type = vbPicTypeBitmap   ' 图象类型
      .hBmp = hBmp              ' 位图句柄
      .hPal = hPal              ' 调色板句柄
   End With

   '建立Picture图象
   r = OleCreatePictureIndirect(Pic, IID_IDispatch, 1, IPic)

   '返回Picture对象
   Set CreateBitmapPicture = IPic
End Function

Public Function CaptureWindow(ByVal hWndSrc As Long, ByVal Client As Boolean, ByVal _
    LeftSrc As Long, ByVal TopSrc As Long, ByVal WidthSrc As Long, ByVal HeightSrc _
    As Long) As Picture

    Dim hDCMemory As Long
    Dim hBmp As Long
    Dim hBmpPrev As Long
    Dim r As Long
    Dim hDCSrc As Long
    Dim hPal As Long
    Dim hPalPrev As Long
    Dim RasterCapsScrn As Long
    Dim HasPaletteScrn As Long
    Dim PaletteSizeScrn As Long
    Dim LogPal As LOGPALETTE

    If Client Then
        hDCSrc = GetDC(hWndSrc)
    Else
        hDCSrc = GetWindowDC(hWndSrc)
    End If

    hDCMemory = CreateCompatibleDC(hDCSrc)
    hBmp = CreateCompatibleBitmap(hDCSrc, WidthSrc, HeightSrc)
    hBmpPrev = SelectObject(hDCMemory, hBmp)

    '获得屏幕属性
    RasterCapsScrn = GetDeviceCaps(hDCSrc, RASTERCAPS)
    HasPaletteScrn = RasterCapsScrn And RC_PALETTE
    PaletteSizeScrn = GetDeviceCaps(hDCSrc, SIZEPALETTE)

    '如果屏幕对象有调色板则获得屏幕调色板
    If HasPaletteScrn And (PaletteSizeScrn = 256) Then
        '建立屏幕调色板的拷贝
        LogPal.palVersion = &H300
        LogPal.palNumEntries = 256
        r = GetSystemPaletteEntries(hDCSrc, 0, 256, LogPal.palPalEntry(0))
        hPal = CreatePalette(LogPal)
        '将新建立的调色板选如建立的内存绘图句柄中
        hPalPrev = SelectPalette(hDCMemory, hPal, 0)
        r = RealizePalette(hDCMemory)
    End If

    '拷贝图象
    r = BitBlt(hDCMemory, 0, 0, WidthSrc, HeightSrc, hDCSrc, LeftSrc, TopSrc, vbSrcCopy)

    hBmp = SelectObject(hDCMemory, hBmpPrev)

    If HasPaletteScrn And (PaletteSizeScrn = 256) Then
        hPal = SelectPalette(hDCMemory, hPalPrev, 0)
    End If

    '释放资源
    r = DeleteDC(hDCMemory)
    r = ReleaseDC(hWndSrc, hDCSrc)

    Set CaptureWindow = CreateBitmapPicture(hBmp, hPal)
End Function
'capturescreen函数捕捉整个屏幕图象
Public Function CaptureScreen() As Picture
    Dim hWndScreen As Long

    '获得桌面的窗口句柄
    hWndScreen = GetDesktopWindow()
    Set CaptureScreen = CaptureWindow(hWndScreen, False, 0, 0, Screen.Width _
        \ Screen.TwipsPerPixelX, Screen.Height \ Screen.TwipsPerPixelY)
End Function

Public Function CaptureActiveWindow() As Picture
    Dim hWndActive As Long
    Dim r As Long
    Dim RectActive As RECT
  
    hWndActive = GetForegroundWindow()
    r = GetWindowRect(hWndActive, RectActive)
    Set CaptureActiveWindow = CaptureWindow(hWndActive, False, 0, 0, _
        RectActive.Right - RectActive.Left, RectActive.Bottom - RectActive.Top)
End Function

Public Sub PrintPictureToFitPage(Prn As Printer, Pic As Picture)
    Const vbHiMetric As Integer = 8
    Dim PicRatio As Double
    Dim PrnWidth As Double
    Dim PrnHeight As Double
    Dim PrnRatio As Double
    Dim PrnPicWidth As Double
    Dim PrnPicHeight As Double
  
    If Pic.Height >= Pic.Width Then
        Prn.Orientation = vbPRORPortrait
    Else
        Prn.Orientation = vbPRORLandscape
    End If
  
    PicRatio = Pic.Width / Pic.Height
  
    PrnWidth = Prn.ScaleX(Prn.ScaleWidth, Prn.ScaleMode, vbHiMetric)
    PrnHeight = Prn.ScaleY(Prn.ScaleHeight, Prn.ScaleMode, vbHiMetric)
    PrnRatio = PrnWidth / PrnHeight
  
    If PicRatio >= PrnRatio Then
        PrnPicWidth = Prn.ScaleX(PrnWidth, vbHiMetric, Prn.ScaleMode)
        PrnPicHeight = Prn.ScaleY(PrnWidth / PicRatio, vbHiMetric, Prn.ScaleMode)
    Else
        PrnPicHeight = Prn.ScaleY(PrnHeight, vbHiMetric, Prn.ScaleMode)
        PrnPicWidth = Prn.ScaleX(PrnHeight * PicRatio, vbHiMetric, Prn.ScaleMode)
    End If
  
    Prn.PaintPicture Pic, 0, 0, PrnPicWidth, PrnPicHeight
End Sub



Private Sub lhHotkey1_HotKeyPressed()
Call Command7_Click
End Sub