VB的启动画面怎么做

从别人那儿学来的：要在form_unload时调用后面的窗口，所涉及的控件自己可以加，图片自己选。
代码如下：直接就可以用。
Private Type rBlendProps
    tBlendOp As Byte
    tBlendOptions As Byte
    tBlendAmount As Byte
    tAlphaType As Byte
End TypePrivate Declare Function AlphaBlend Lib "msimg32" (ByVal hDestDC As Long, _
        ByVal X As Long, ByVal Y As Long, ByVal nWidth As Long, _
        ByVal nHeight As Long, ByVal hSrcDC As Long, _
        ByVal xSrc As Long, ByVal ySrc As Long, ByVal WidthSrc As Long, _
        ByVal HeightSrc As Long, ByVal blendFunct As Long) As BooleanPrivate Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _
        (Destination As Any, Source As Any, ByVal Length As Long)Dim lTime As Byte'拷贝图片的描述部分
'Requires Windows NT 4.0 or later; Requires Windows 95 or laterConst RC_PALETTE As Long = &H100
Const SIZEPALETTE As Long = 104
Const RASTERCAPS As Long = 38
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 ' Enough for 256 colors
End Type
Private Type GUID
    Data1 As Long
    Data2 As Integer
    Data3 As Integer
    Data4(7) As Byte
End Type
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 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 SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject 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 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 BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal X As Long, ByVal Y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC 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 GetDC Lib "USER32" (ByVal hwnd As Long) As LongSub ShowTransparency(cSrc As PictureBox, cDest As PictureBox, ByVal nLevel As Byte)
    Dim LrProps As rBlendProps
    Dim LnBlendPtr As Long

    cDest.Cls
    LrProps.tBlendAmount = nLevel
    CopyMemory LnBlendPtr, LrProps, 4
    With cSrc
        AlphaBlend cDest.hdc, 0, 0, .ScaleWidth, .ScaleHeight, _
            .hdc, 0, 0, .ScaleWidth, .ScaleHeight, LnBlendPtr
    End With
    cDest.Refresh
End SubPrivate Sub Command1_Click()
    lTime = 0
    Timer1.Interval = 70
    Timer1.Enabled = True
End SubPrivate Sub Form_Unload(Cancel As Integer)
    Frm_Logon.Show
End SubPrivate Sub Timer1_Timer()
    lTime = lTime + 15      '可以控制渐变的速度
    ShowTransparency Picture2, Picture1, lTime
    If lTime >= 255 Then
        Timer1.Enabled = False
        lTime = 255
        Me.Caption = Str(Int(lTime / 2.55)) + "%"
        Unload Me
        Exit Sub
    End If
    Me.Caption = Str(Int(lTime / 2.55)) + "%"
End SubFunction CreateBitmapPicture(ByVal hBmp As Long, ByVal hPal As Long) As Picture
    Dim R As Long, Pic As PicBmp, IPic As IPicture, IID_IDispatch As GUID    'Fill GUID info
    With IID_IDispatch
        .Data1 = &H20400
        .Data4(0) = &HC0
        .Data4(7) = &H46
    End With    'Fill picture info
    With Pic
        .Size = Len(Pic) ' Length of structure
        .Type = vbPicTypeBitmap ' Type of Picture (bitmap)
        .hBmp = hBmp ' Handle to bitmap
        .hPal = hPal ' Handle to palette (may be null)
    End With    'Create the picture
    R = OleCreatePictureIndirect(Pic, IID_IDispatch, 1, IPic)    'Return the new picture
    Set CreateBitmapPicture = IPic
End Function
Function hDCToPicture(ByVal hDCSrc As Long, ByVal LeftSrc As Long, ByVal TopSrc As Long, ByVal WidthSrc As Long, ByVal HeightSrc As Long) As Picture
    Dim hDCMemory As Long, hBmp As Long, hBmpPrev As Long, R As Long
    Dim hPal As Long, hPalPrev As Long, RasterCapsScrn As Long, HasPaletteScrn As Long
    Dim PaletteSizeScrn As Long, LogPal As LOGPALETTE    'Create a compatible device context
    hDCMemory = CreateCompatibleDC(hDCSrc)
    'Create a compatible bitmap
    hBmp = CreateCompatibleBitmap(hDCSrc, WidthSrc, HeightSrc)
    'Select the compatible bitmap into our compatible device context
    hBmpPrev = SelectObject(hDCMemory, hBmp)    'Raster capabilities?
    RasterCapsScrn = GetDeviceCaps(hDCSrc, RASTERCAPS) ' Raster
    'Does our picture use a palette?
    HasPaletteScrn = RasterCapsScrn And RC_PALETTE ' Palette
    'What's the size of that palette?
    PaletteSizeScrn = GetDeviceCaps(hDCSrc, SIZEPALETTE) ' Size of    If HasPaletteScrn And (PaletteSizeScrn = 256) Then
        'Set the palette version
        LogPal.palVersion = &H300
        'Number of palette entries
        LogPal.palNumEntries = 256
        'Retrieve the system palette entries
        R = GetSystemPaletteEntries(hDCSrc, 0, 256, LogPal.palPalEntry(0))
        'Create the palette
        hPal = CreatePalette(LogPal)
        'Select the palette
        hPalPrev = SelectPalette(hDCMemory, hPal, 0)
        'Realize the palette
        R = RealizePalette(hDCMemory)
    End If    'Copy the source image to our compatible device context
    R = BitBlt(hDCMemory, 0, 0, WidthSrc, HeightSrc, hDCSrc, LeftSrc, TopSrc, vbSrcCopy)    'Restore the old bitmap
    hBmp = SelectObject(hDCMemory, hBmpPrev)    If HasPaletteScrn And (PaletteSizeScrn = 256) Then
        'Select the palette
        hPal = SelectPalette(hDCMemory, hPalPrev, 0)
    End If    'Delete our memory DC
    R = DeleteDC(hDCMemory)    Set hDCToPicture = CreateBitmapPicture(hBmp, hPal)
End Function
Private Sub Form_Load()Command1.Visible = False
Frm_Transparency.Width = 533 * Screen.TwipsPerPixelY
Frm_Transparency.Height = 400 * Screen.TwipsPerPixelX
Frm_Transparency.Top = (Screen.Height - Frm_Transparency.Height) / 2
Frm_Transparency.Left = (Screen.Width - Frm_Transparency.Width) / 2
Me.Appearance = 0
Picture1.Appearance = 0
Picture2.Appearance = 0
Picture1.BorderStyle = 0
Picture2.BorderStyle = 0
Picture2.Visible = FalsePicture1.ScaleMode = 3
Picture2.ScaleMode = 3Me.AutoRedraw = True
Picture1.AutoRedraw = True
Picture2.AutoRedraw = True    Dim X, Y As Long

    'Picture1.Move 0, 0, Me.Width, Me.Height
    Picture1.Move 0, 0, 10 * Screen.TwipsPerPixelY, Me.Height
    Picture2.Move 0, 0, Me.Width, Me.Height

    X = (Screen.Width - Me.Width) / 2 / Screen.TwipsPerPixelX
    Y = (Screen.Height - Me.Height - 1) / 2 / Screen.TwipsPerPixelY

    '拷贝本窗体覆盖的图片到Picture2
    Set Picture2.Picture = hDCToPicture(GetDC(0), X, Y, Me.Width / Screen.TwipsPerPixelX, Me.Height / Screen.TwipsPerPixelY)

    lTime = 0
    Timer2.Interval = 10
    Timer2.Enabled = True
    Timer1.Interval = 50
    Timer1.Enabled = False
End SubPrivate Sub Timer2_Timer()
    If Picture1.Width < Frm_Transparency.Width Then
        Picture1.Width = Picture1.Width + 4 * Screen.TwipsPerPixelY
    Else
        Picture1.Width = Frm_Transparency.Width
        Timer2.Enabled = False
        Timer1.Interval = 50
        Timer1.Enabled = True
    End If
End Sub

调试易

VB的启动画面怎么做

解决方案 »