frmbuttons.frm

Visual Basic 6 大学教程的代码

VERSION 5.00
Begin VB.Form frmButtons 
   AutoRedraw      =   -1  'True
   BackColor       =   &H00C0C0C0&
   Caption         =   "Fig. 12.7: Mouse Buttons "
   ClientHeight    =   3195
   ClientLeft      =   2865
   ClientTop       =   1950
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   Begin VB.Label lblKeys 
      Caption         =   "ALT"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   13.5
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Index           =   4
      Left            =   3120
      TabIndex        =   2
      Top             =   2520
      Width           =   1215
   End
   Begin VB.Label lblKeys 
      Caption         =   "CTRL"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   13.5
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Index           =   2
      Left            =   1920
      TabIndex        =   1
      Top             =   2520
      Width           =   975
   End
   Begin VB.Label lblKeys 
      Caption         =   "SHIFT"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   13.5
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Index           =   1
      Left            =   480
      TabIndex        =   0
      Top             =   2520
      Width           =   1215
   End
   Begin VB.Image imgImage 
      Height          =   1935
      Left            =   1440
      Top             =   360
      Width           =   1695
   End
End
Attribute VB_Name = "frmButtons"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
' Fig. 12.7
' Mouse buttons
Option Explicit      ' General declaration

Private Sub Form_Load()
   imgImage.Picture = LoadPicture("d:\images\ch12\mouse0.gif")
End Sub

Private Sub Form_MouseDown(Button As Integer, _
                           Shift As Integer, x As Single, _
                           Y As Single)
 
   Dim a As Integer, c As Integer, s As Integer
         
   a = Shift And vbAltMask      ' Mask Alt bit
   c = Shift And vbCtrlMask     ' Mask Ctrl bit
   s = Shift And vbShiftMask    ' Mask Shift bit

   If (a <> 0) Then     ' Alt
      lblKeys(a).BackColor = vbGreen
   End If
   
   If (s <> 0) Then     ' Shift
      lblKeys(s).BackColor = vbGreen
   End If
   
   If (c <> 0) Then     ' Ctrl
      lblKeys(c).BackColor = vbGreen
   End If
      
   imgImage.Picture = LoadPicture("d:\images\ch12\mouse" & _
                                  Button & ".gif")
End Sub

Private Sub Form_MouseUp(Button As Integer, Shift As Integer, _
                         x As Single, Y As Single)
 
   ' Change Label BackColors to Form's BackColor
   lblKeys(1).BackColor = BackColor
   lblKeys(2).BackColor = BackColor
   lblKeys(4).BackColor = BackColor
   
   ' Load mouse image of unpressed buttons
   imgImage.Picture = LoadPicture("d:\images\ch12\mouse0.gif")
End Sub