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- 在一些软件演示中,这一屏内容到下一屏内容间往往以一些有趣的清屏图案来相互切换,有的像演出舞台上的开幕、闭幕,有的像百叶窗,也有一些圆形、菱形等形态各异的清屏图案。VB作为一门优秀的WINDOWS下的开发语言,其图形功能也很强。我们完全可以用其提供的画线语句作出上述的清屏图案,下面的程序给出了常见的清屏图案程序:
- Sub FilSCrO'设置背景色
- Me.BackColor=RGB(Int(Rnd*256),Int(Rnd*256),Int(Rnd*256))
- End Sub
- Sub ClrScrl()'从左右两边到中间清屏
- Dim i As Integer:Randomize:color=RGB(Int(Rnd*256),Int(Rnd*256),Int(Rnd*256))
- For i=0 To ScaleWidth/2
- Line(i,0)-(i,ScaleHeight),color
- Line(ScaleWidth-i,0)-(ScaleWidth-i,ScaleHeight),color
- Next i
- End Sub
- Sub ClrSer20'从中间到左右两边清屏
- Dim i As Integer:Randomize:color=RGB(Int(Rnd*256),Int(Rnd*256),Int(Rnd*256))
- for i=ScaleWidth/2 To 0 Step -1
- Line(i,0)-(i,ScaleHeight-1),color
- Line(ScaleWidth-i,0)-(ScaleWidth-i,ScaleHeight),color
- Next i
- End Sub
- Sub ClrScr30'从上(顶)下(低)到中间清屏
- Dim i As Integer:Randomize:color=RGB(Int(Rnd*256),Int(Rnd*256),Int(Rnd*256))
- For i=0 To ScaleHeight/2
- Line(0,i)-(ScaleWidth,i),color
- Line(0,ScaleHeight-i)-(ScaleWidth,ScaleHeight-i),color
- next i
- End Sub
- Sub ClrScr40'从中间到上(顶)下(底)清屏
- Dim i As Integer:Randomize:color=RGB(Int(Rnd*256),Int(Rnd*256),Int(Rnd*256))
- For i=ScaleHeight/2 To 0 Step -1
- Line(0,i)_(ScaleWidth,i),color
- Line(0,ScaleHeight-i)-(ScaleWidth,ScaleHeight-i),color
- Next i
- End Sub
- Sub ClrScr50'菱形清屏,从四角向中心
- Dim i,j As Integer:Randomize:color=RGB(Int(Rnd*256),Int(Rnd*256),Int(Rnd*256))
- For i=0 To ScaleWidth Sep 200
- For j=0 To ScaleHeight Step200*ScaleHeight/ScaleWidth
- Line(i,0)-(0,j),color
- Line(ScaleWidth-i,ScaleHeight)-(ScaleWidth,ScaleHeight-j),color
- Line(0,ScaleHeight-j)-(i,ScaleHeight),color
- Line(ScaleWidth-i,0)-(ScaleWidth,ScaleHeight-j),color
- Next j
- Next i
- End Sub
- Sub ClrScr60'圆形清屏,由大至小从外围向中心
- Dim i As Integer:Randomize:color=RGB(Int(Rnd*256),Int(Rnd*256),Int(Rnd*256))
- For i=ScaleWidth To 0 Step-3
- Circle(ScaleWidth/2,ScaleHeight/2,i/2,color
- Next i
- End Sub
- Sub ClrScr70'圆形清屏,由小至大从中心向外围
- Dim i As Integer:Randomize:color=RGB(Int(Rnd*256),Int(Rnd*256),Int(Rnd*256))
- For i=0 To ScaleHeight Step 3
- Circle(ScaleWidth/2,ScaleHeight/2),i/2,color
- Next i
- End Sub
- ‘以上程序作为定义的子函数,置于General间
- Sub Form_Activate()
- FillSCr;ClrScr1;ClrScr2;ClrScr3;ClrScr4;ClrScr5;ClrScr7;ClrScr6
- End Sub
- Private Sub Form_Click()
- End
- End Sub
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