‘对全局变量和API函数的通用声明(API函数Sleep,
BitBlt及其常参数SRCCOPY的声明从略，可从API浏览器中复制、粘贴): Dim 1(4) As Boolean, i as
Long, s As String, zt As Integer ‘实现图片渐现渐隐的通用过程: Private Sub
PicCpy(Optional strip As Integer=10, Optional delay As Integer=20) Dim
plw As Integer, plh As Integer,p2 As Integer If 1(3)=True
Then Picture1 =
LoadPicture("c:\win98\安装程序.bmp") Else Picture1=LoadPicture("") End
If plw = Picturel.Width plh=Picturel.Height p2=0 Do While
p2<= plw BitBlt Picture2.hDC,p2,0, strip, plh,
Picture1.hDC,p2,0,SRCCOPY p2=p2 + strip Sleep
delay DoEvents Loop‘由于图片宽度不一定是strip的整数倍，故下面再全图复制一遍图片: BitBlt
Picture2.hDC,0,0,plw,plh,Picture1.hDC,0,0,SRCCOPY End
Sub
Private Sub
Form_load() Label1.Font.Name="黑体" Image1.Top=0 Image1.Left=0 Picture2.Top=0 Picture2.Left=Screen.Width
- Picthne2.Width s="产生缩放和隐现效果的文字" zt=5'zt为字体大小控制变量 i=0
'i为显示文字时截取文字的字数变量 End Sub
Private Sub Cmd_Click (Index As
Integer) If 1(Index)=True
Then 1(Index)=False Else 1(Idex) = True End
If Select Case Index Case 0
'激活timer1的timer过程 Timer1.Enabled=True Timer1.Interval=50 ......
'Case1, 2与上述类似，分别激活timer2, timer3的timer过程 Case 3
'调用图片复制过程Piccpy
PiCpy 10, 50 Case 4‘结束程序运行 Unload
Me End End Select End Sub Private Sub Timer1_Timer()
'实现文字缩放的过程 If 1(0)=Trun
Then zt=zt<+5 Else Zt=Zt-5 Else If If zt>50
or zt<=5 Then Timer1.Enabled=False End If With
Label1 .Font.Size=zt .Left=(Form1.Width - Lable1.Width)
/2 .Top=(Form1.Height - Label1.Height)/2 End
With Label1.Caption=s End Sub
Private Sub Timer2_Timer()
'实现图片缩放的过程 If 1(1)=True Then
'使图片放大 Image1.Width=Image1.Width+Form1.Width/10 Image1.Height=Image1.Height+Form1.Height/10 Else
'使图片缩小 Image1.Width=Image1.Width -
Form1.Width/10 Image1.Height=Image1.Height - Form1.Height/10 End
If If (Image1.Width >=Form1.Width/2) or (Image1.Width
<=Form1.Width/10) Then Timer2.Enabled=False End
If Image1=LoadPicture("c:\win98\安装程序.bmp") End Sub
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