Option Explicit
Public Sub IntervalX(ByVal intI As Integer)
If intI > 0 Then Sleep (intI) '制造千分之intI秒的时间间隔
End Sub
Public Sub ShowTransparency(SrcDC As Long, _
ByVal SrcX As Long, _
ByVal SrcY As Long, _
ByVal SrcHeight As Long, _
ByVal SrcWidth As Long, _
DestDC As Long, _
ByVal DestX, _
ByVal DestY, _
ByVal DestHeight As Long, _
ByVal DestWidth As Long, _
ByVal nLevel As Byte)
Dim LrProps As rBlendProps
Dim LnBlendPtr As Long
LrProps.tBlendAmount = nLevel
CopyMemory LnBlendPtr, LrProps, 4
AlphaBlend DestDC, DestX, DestY, DestWidth, DestHeight, _
SrcDC, SrcX, SrcY, SrcWidth, SrcHeight, LnBlendPtr
End Sub
Public Sub CopyPictureX(ByVal dcSour As Long, _
ByVal SourX As Long, _
ByVal SourY As Long, _
ByVal dcDest As Long, _
ByVal DestX As Long, _
ByVal DestY As Long, _
ByVal DestWidth As Long, _
ByVal DestHeight As Long)
'dcSour——>dcDest
BitBlt dcDest, DestX, DestY, DestWidth, DestHeight, dcSour, SourX, SourY, SRCCOPY
End Sub
Public Sub ScreenCls()
'刷新桌面
InvalidateRectAsAny 0, ByVal 0&, True
End Sub
Private Sub Form_Load()
Dim i, l, t
Picture2.Height = Picture1.Height
Picture2.Width = Picture1.Width
l = (Screen.Width / Screen.TwipsPerPixelX - Picture1.ScaleWidth) / 2
t = (Screen.Height / Screen.TwipsPerPixelY - Picture1.ScaleHeight) / 2
CopyPictureX GetDC(0), l, t, Picture2.hdc, 0, 0, Picture2.ScaleWidth, Picture2.Height
For i = 0 To 150 Step 7
IntervalX 150 - i
DoEvents
ShowTransparency Picture1.hdc, 0, 0, Picture1.ScaleHeight, _
Picture1.ScaleWidth, GetDC(0), l, t, _
Picture1.ScaleHeight, Picture1.ScaleWidth, i
Next i
IntervalX 1000
For i = 0 To 150 Step 7
IntervalX 150 - i
DoEvents
ShowTransparency Picture2.hdc, 0, 0, Picture2.ScaleHeight, _
Picture2.ScaleWidth, GetDC(0), l, t, _
Picture2.ScaleHeight, Picture2.ScaleWidth, i
Next i
ScreenCls
Unload Me
End Sub
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