以下是引用曙光电子在2013-3-4 17:08:25的发言：
另一种旋转方法
代码:
Option Explicit
Private Declare Function SelectObject Lib "gdi32" (ByVal hDC As Long, ByVal hObject As Long) As Long
Private fnt As CLogFont
Private Sub Check1_Click()
Timer1.Enabled = CBool(Check1.Value)
HScroll1.Enabled = Not Timer1.Enabled
If Timer1.Enabled Then
HScroll1.Value = 0
Picture1.Cls
End If
End Sub
Private Sub Command1_Click()
Picture1.Cls
End Sub
Private Sub Command2_Click()
End
End Sub
Private Sub Form_Load()
Set fnt = New CLogFont
Set fnt.LogFont = Picture1.Font
HScroll1.Value = 0
Set Me.Icon = Nothing
End Sub
Private Sub Form_Resize()
On Error Resume Next
With HScroll1
.Width = Me.ScaleWidth - .Left * 2
Picture1.Move .Left, Picture1.Top, Me.ScaleWidth - .Left * 2, Me.ScaleHeight - Picture1.Top - .Left
Command1.Left = Me.ScaleWidth - .Left - Command1.Width
Check1.Left = Me.ScaleWidth - .Left - Check1.Width
End With
End Sub
Private Sub HScroll1_Change()
fnt.Rotation = HScroll1.Value
Label1.Caption = "&旋转角度 (" & HScroll1.Value & "):"
End Sub
Private Sub HScroll1_Scroll()
Label1.Caption = "&旋转角度 (" & HScroll1.Value & "):"
End Sub
Private Sub Label2_Click()
End Sub
Private Sub Picture1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
Dim hFont As Long
With Picture1
hFont = SelectObject(.hDC, fnt.Handle)
.CurrentX = X
.CurrentY = Y
Picture1.Print "胡大勤: " & fnt.Rotation
Call SelectObject(.hDC, hFont)
End With
End Sub
Private Sub Timer1_Timer()
With HScroll1
If .Value = .Max Then
.Value = .Min
Else
.Value = .Value + .LargeChange
End If
If (.Value Mod 360) = 0 Then Picture1.Cls
End With
With Picture1
Picture1_MouseUp 0, 0, .ScaleWidth \ 2, .ScaleHeight \ 2
End With
End Sub
类模块代码:
Option Explicit
Private Const LF_FACESIZE = 32
Private Const LF_FULLFACESIZE = 64
Private Const CLIP_DEFAULT_PRECIS = 0
Private Const CLIP_CHARACTER_PRECIS = 1
Private Const CLIP_STROKE_PRECIS = 2
Private Const CLIP_MASK = &HF
Private Const CLIP_LH_ANGLES = 16
Private Const CLIP_TT_ALWAYS = 32
Private Const CLIP_EMBEDDED = 128
Private Const DEFAULT_QUALITY = 0
Private Const DRAFT_QUALITY = 1
Private Const PROOF_QUALITY = 2
Private Const DEFAULT_PITCH = 0
Private Const FIXED_PITCH = 1
Private Const VARIABLE_PITCH = 2
Private Const ANSI_CHARSET = 0
Private Const DEFAULT_CHARSET = 1
Private Const SYMBOL_CHARSET = 2
Private Const SHIFTJIS_CHARSET = 128
Private Const HANGEUL_CHARSET = 129
Private Const CHINESEBIG5_CHARSET = 136
Private Const OEM_CHARSET = 255
Private Const FF_DONTCARE = 0
Private Const FF_ROMAN = 16
Private Const FF_SWISS = 32
Private Const FF_MODERN = 48
Private Const FF_SCRIPT = 64
Private Const FF_DECORATIVE = 80
Private Const FW_DONTCARE = 0
Private Const FW_THIN = 100
Private Const FW_EXTRALIGHT = 200
Private Const FW_LIGHT = 300
Private Const FW_NORMAL = 400
Private Const FW_MEDIUM = 500
Private Const FW_SEMIBOLD = 600
Private Const FW_BOLD = 700
Private Const FW_EXTRABOLD = 800
Private Const FW_HEAVY = 900
Private Const FW_ULTRALIGHT = FW_EXTRALIGHT
Private Const FW_REGULAR = FW_NORMAL
Private Const FW_DEMIBOLD = FW_SEMIBOLD
Private Const FW_ULTRABOLD = FW_EXTRABOLD
Private Const FW_BLACK = FW_HEAVY
Private Const OUT_DEFAULT_PRECIS = 0
Private Const OUT_STRING_PRECIS = 1
Private Const OUT_CHARACTER_PRECIS = 2
Private Const OUT_STROKE_PRECIS = 3
Private Const OUT_TT_PRECIS = 4
Private Const OUT_DEVICE_PRECIS = 5
Private Const OUT_RASTER_PRECIS = 6
Private Const OUT_TT_ONLY_PRECIS = 7
Private Const OUT_OUTLINE_PRECIS = 8
Private Type LogFont
lfHeight As Long
lfWidth As Long
lfEscapement As Long
lfOrientation As Long
lfWeight As Long
lfItalic As Byte
lfUnderline As Byte
lfStrikeOut As Byte
lfCharSet As Byte
lfOutPrecision As Byte
lfClipPrecision As Byte
lfQuality As Byte
lfPitchAndFamily As Byte
lfFaceName As String * LF_FACESIZE
End Type
Private Declare Function CreateFontIndirect Lib "gdi32" Alias "CreateFontIndirectA" (lpLogFont As LogFont) As Long
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Private Declare Function GetDeviceCaps Lib "gdi32" (ByVal hDC As Long, ByVal nIndex As Long) As Long
Private Const LOGPIXELSY = 90
Private Declare Function GetDesktopWindow Lib "user32" () As Long
Private Declare Function GetDC Lib "user32" (ByVal hWnd As Long) As Long
Private Declare Function ReleaseDC Lib "user32" (ByVal hWnd As Long, ByVal hDC As Long) As Long
Private m_Font As StdFont
Private m_hFont As Long
Private m_Rotation As Single
Private Sub Class_Terminate()
If m_hFont Then
Call DeleteObject(m_hFont)
Set m_Font = Nothing
End If
End Sub
Public Property Set LogFont(ByVal NewFont As Font)
If m_hFont Then
Call DeleteObject(m_hFont)
m_hFont = 0
End If
If NewFont Is Nothing Then
Set m_Font = Nothing
Else
Set m_Font = New StdFont
With m_Font
.Bold = NewFont.Bold
.Charset = NewFont.Charset
.Italic = NewFont.Italic
.Name = NewFont.Name
.Size = NewFont.Size
.Strikethrough = NewFont.Strikethrough
.Underline = NewFont.Underline
.Weight = NewFont.Weight
End With
m_hFont = CreateLogFont
End If
End Property
Public Property Get LogFont() As Font
Set LogFont = m_Font
End Property
Public Property Let Rotation(ByVal NewVal As Single)
If NewVal <> m_Rotation Then
m_Rotation = NewVal
If m_hFont Then
Call DeleteObject(m_hFont)
m_hFont = 0
End If
If Not (m_Font Is Nothing) Then
m_hFont = CreateLogFont
End If
End If
End Property
Public Property Get Rotation() As Single
Rotation = m_Rotation
End Property
Public Property Get Handle() As Long
Handle = m_hFont
End Property
Private Function CreateLogFont() As Long
Dim lf As LogFont
Dim hWnd As Long
Dim hDC As Long
hWnd = GetDesktopWindow
hDC = GetDC(hWnd)
With lf
.lfHeight = -(m_Font.Size * GetDeviceCaps(hDC, LOGPIXELSY)) / 72
.lfWidth = 0
.lfEscapement = m_Rotation * 10
.lfOrientation = .lfEscapement
.lfWeight = m_Font.Weight
.lfItalic = m_Font.Italic
.lfUnderline = m_Font.Underline
.lfStrikeOut = m_Font.Strikethrough
.lfClipPrecision = CLIP_DEFAULT_PRECIS
.lfQuality = PROOF_QUALITY
.lfPitchAndFamily = DEFAULT_PITCH Or FF_DONTCARE
.lfFaceName = m_Font.Name & vbNullChar
.lfCharSet = m_Font.Charset
If .lfCharSet = OEM_CHARSET Then
If (m_Rotation Mod 360) <> 0 Then
.lfCharSet = ANSI_CHARSET
End If
End If
If (m_Rotation Mod 360) <> 0 Then
.lfOutPrecision = OUT_TT_ONLY_PRECIS
Else
.lfOutPrecision = OUT_DEFAULT_PRECIS
End If
End With
CreateLogFont = CreateFontIndirect(lf)
Call ReleaseDC(hWnd, hDC)
End Function
真的非常多谢你的回复，看来你非常了解API函数！你是API高手吧？
