calendar.frm

这个不错

VERSION 5.00
Begin VB.Form frmCalendar 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "Get Date"
   ClientHeight    =   1695
   ClientLeft      =   3285
   ClientTop       =   3945
   ClientWidth     =   2310
   KeyPreview      =   -1  'True
   LinkTopic       =   "Form3"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   PaletteMode     =   1  'UseZOrder
   ScaleHeight     =   1695
   ScaleWidth      =   2310
   StartUpPosition =   2  '屏幕中心
   Begin VB.PictureBox picMonth 
      BorderStyle     =   0  'None
      ClipControls    =   0   'False
      Height          =   1215
      Left            =   120
      ScaleHeight     =   1215
      ScaleWidth      =   2055
      TabIndex        =   0
      Top             =   360
      Width           =   2055
   End
   Begin VB.Label lblMonth 
      Alignment       =   2  'Center
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   8.25
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   255
      Left            =   360
      TabIndex        =   1
      Top             =   120
      Width           =   1575
   End
   Begin VB.Label lblNext 
      Alignment       =   2  'Center
      Caption         =   ">>"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   8.25
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   255
      Left            =   1920
      TabIndex        =   3
      Top             =   120
      Width           =   375
   End
   Begin VB.Label lblPrev 
      Alignment       =   2  'Center
      Caption         =   "<<"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   8.25
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   255
      Left            =   0
      TabIndex        =   2
      Top             =   120
      Width           =   375
   End
End
Attribute VB_Name = "frmCalendar"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False

Option Explicit

'Grid dimensions for days
Private Const GRID_ROWS = 6
Private Const GRID_COLS = 7

'Private variables
Private m_CurrDate As Date, m_bAcceptChange As Boolean
Private m_nGridWidth As Integer, m_nGridHeight As Integer

'Public function: If user selects date, sets UserDate to selected
'date and returns True. Otherwise, returns False.
Public Function GetDate(UserDate As Date, Optional Title) As Boolean
    'Store user-specified date
    m_CurrDate = UserDate
    'Use caller-specified caption if any
    If Not IsMissing(Title) Then
        Caption = Title
    End If
    'Display this form
    Me.Show vbModal
    'Return selected date
    If m_bAcceptChange Then
        UserDate = m_CurrDate
    End If
    'Return value indicates if date was selected
    GetDate = m_bAcceptChange
End Function

'Form initialization
Private Sub Form_Load()
    'Calculate calendar grid measurements
    m_nGridWidth = ((picMonth.ScaleWidth - Screen.TwipsPerPixelX) \ GRID_COLS)
    m_nGridHeight = ((picMonth.ScaleHeight - Screen.TwipsPerPixelY) \ GRID_ROWS)
    m_bAcceptChange = False
End Sub

Private Sub lblMonth_Click()

End Sub

'Process user keystrokes
Private Sub picMonth_KeyDown(KeyCode As Integer, Shift As Integer)
    Dim NewDate As Date
    
    Select Case KeyCode
        Case vbKeyRight
            NewDate = DateAdd("d", 1, m_CurrDate)
        Case vbKeyLeft
            NewDate = DateAdd("d", -1, m_CurrDate)
        Case vbKeyDown
            NewDate = DateAdd("ww", 1, m_CurrDate)
        Case vbKeyUp
            NewDate = DateAdd("ww", -1, m_CurrDate)
        Case vbKeyPageDown
            NewDate = DateAdd("m", 1, m_CurrDate)
        Case vbKeyPageUp
            NewDate = DateAdd("m", -1, m_CurrDate)
        Case vbKeyReturn
            m_bAcceptChange = True
            Unload Me
            Exit Sub
        Case vbKeyEscape
            Unload Me
            Exit Sub
        Case Else
            Exit Sub
    End Select
    SetNewDate NewDate
    KeyCode = 0
End Sub

'Double-click accepts current date
Private Sub picMonth_DblClick()
    m_bAcceptChange = True
    Unload Me
End Sub

' Select the date by mouse
Private Sub picMonth_MouseDown(Button As Integer, Shift As Integer, x As Single, y As Single)
    Dim i As Integer, MaxDay As Integer

    'Determine which date is being clicked
    i = Weekday(DateSerial(Year(m_CurrDate), Month(m_CurrDate), 1)) - 1
    i = (((x \ m_nGridWidth) + 1) + ((y \ m_nGridHeight) * GRID_COLS)) - i
    'Get last day of current month
    MaxDay = Day(DateAdd("d", -1, DateSerial(Year(m_CurrDate), Month(m_CurrDate) + 1, 1)))
    If i >= 1 And i <= MaxDay Then
        SetNewDate DateSerial(Year(m_CurrDate), Month(m_CurrDate), i)
    End If
End Sub

'Click on ">>" goes to next month
Private Sub lblNext_MouseDown(Button As Integer, Shift As Integer, x As Single, y As Single)
    If Button And vbLeftButton Then
        SetNewDate DateAdd("m", 1, m_CurrDate)
    End If
End Sub

'Double-click has same effect
Private Sub lblNext_DblClick()
    SetNewDate DateAdd("m", 1, m_CurrDate)
End Sub

'Click on "<<" goes to previous month
Private Sub lblPrev_MouseDown(Button As Integer, Shift As Integer, x As Single, y As Single)
    If Button And vbLeftButton Then
        SetNewDate DateAdd("m", -1, m_CurrDate)
    End If
End Sub

'Double-click has same effect
Private Sub lblPrev_DblClick()
    SetNewDate DateAdd("m", -1, m_CurrDate)
End Sub

'Changes the selected date
Private Sub SetNewDate(NewDate As Date)
    If Month(m_CurrDate) = Month(NewDate) And Year(m_CurrDate) = Year(NewDate) Then
        DrawSelectionBox False
        m_CurrDate = NewDate
        DrawSelectionBox True
    Else
        m_CurrDate = NewDate
        picMonth_Paint
    End If
End Sub

'Here's the calendar paint handler; displayes the calendar days
Private Sub picMonth_Paint()
    Dim i As Integer, j As Integer, x As Integer, y As Integer
    Dim NumDays As Integer, CurrPos As Integer, bCurrMonth As Boolean
    Dim MonthStart As Date, buffer As String
    
    'Determine if this month is today's month
    If Month(m_CurrDate) = Month(Date) And Year(m_CurrDate) = Year(Date) Then
        bCurrMonth = True
    End If
    'Get first date in the month
    MonthStart = DateSerial(Year(m_CurrDate), Month(m_CurrDate), 1)
    'Number of days in the month
    NumDays = DateDiff("d", MonthStart, DateAdd("m", 1, MonthStart))
    'Get first weekday in the month (0 - based)
    j = Weekday(MonthStart) - 1
    'Tweak for 1-based For/Next index
    j = j - 1
    'Show current month/year
    lblMonth = Format$(m_CurrDate, "mmmm yyyy")
    'Clear existing data
    picMonth.Cls
    'Display dates for current month
    For i = 1 To NumDays
        CurrPos = i + j
        x = (CurrPos Mod GRID_COLS) * m_nGridWidth
        y = (CurrPos \ GRID_COLS) * m_nGridHeight
        'Show date as bold if today's date
        If bCurrMonth And i = Day(Date) Then
            picMonth.Font.Bold = True
        Else
            picMonth.Font.Bold = False
        End If
        'Center date within "date cell"
        buffer = CStr(i)
        picMonth.CurrentX = x + ((m_nGridWidth - picMonth.TextWidth(buffer)) / 2)
        picMonth.CurrentY = y + ((m_nGridHeight - picMonth.TextHeight(buffer)) / 2)
        'Print date
        picMonth.Print buffer;
    Next i
    'Indicate selected date
    DrawSelectionBox True
End Sub

'Draw or clears the selection box around the current date
Private Sub DrawSelectionBox(bSelected As Boolean)
    Dim clrTopLeft As Long, clrBottomRight As Long
    Dim i As Integer, x As Integer, y As Integer

    'Set highlight and shadow colors
    If bSelected Then
        clrTopLeft = vbButtonShadow
        clrBottomRight = vb3DHighlight
    Else
        clrTopLeft = vbButtonFace
        clrBottomRight = vbButtonFace
    End If
    'Compute location for current date
    i = Weekday(DateSerial(Year(m_CurrDate), Month(m_CurrDate), 1)) - 1
    i = i + (Day(m_CurrDate) - 1)
    x = (i Mod GRID_COLS) * m_nGridWidth
    y = (i \ GRID_COLS) * m_nGridHeight
    'Draw box around date
    picMonth.Line (x, y + m_nGridHeight)-Step(0, -m_nGridHeight), clrTopLeft
    picMonth.Line -Step(m_nGridWidth, 0), clrTopLeft
    picMonth.Line -Step(0, m_nGridHeight), clrBottomRight
    picMonth.Line -Step(-m_nGridWidth, 0), clrBottomRight
End Sub