VisualBasic中PaintPicture圖形常見的使用方法

　　Private Sub Command2_Click()

　　Picture1.AutoSize = True

　　Do

　　xx = Rnd * Picture2.Width

　　yy = Rnd * Picture2.Height

　　Picture2.PaintPicture Picture1.Picture, xx, yy,Picture1.Width,Picture1.Height

　　DoEvents

　　Loop

　　End Sub

　　鏡頭推出效果

　　Private Sub Command3_Click()

　　Picture2.Cls

　　Picture1.AutoSize = False

　　Picture1.Width = 0

　　Picture1.Height = 0

　　For i = 0 To 2000 Step 2

　　roww = (Picture2.Width - Picture1.Width) / 2 - i / 2

　　coll = (Picture2.Height - Picture1.Height) / 2 - i / 2

　　Picture2.PaintPicture Picture1.Picture, roww, coll,Picture1.Width + i, Picture1.Height + i

　　DoEvents

　　Next i

　　For i = 2000 To 0 Step -2

　　roww = (Picture2.Width - Picture1.Width) / 2 - i / 2

　　coll = (Picture2.Height - Picture1.Height) / 2 - i / 2

　　Picture2.PaintPicture Picture1.Picture, roww, coll,Picture1.

　　Width + i, Picture1.Height + i

　　DoEvents

　　Next i

　　Picture1.AutoSize = True

　　End Sub

　　拖尾效果

　　Private Sub Command4_Click()

　　Picture2.Cls

　　Picture1.AutoSize = False

　　Picture1.Width = 0

　　Picture1.Height = 0

　　For i = 0 To 2000 Step 2

　　stepp = i / 2

　　Picture2.PaintPicture Picture1.Picture, stepp, stepp,Picture1.Width + i, Picture1.Height + i

　　DoEvents

　　Next i

　　Picture1.AutoSize = True

　　End Sub

　　結(jié)束按鈕

　　Private Sub Command5_Click()

　　End

　　End Sub

　　準(zhǔn)備工作

　　Private Sub Form_Load()

　　Picture1.Picture = LoadPicture("d:\windows\256color.bmp")

　　Command1.Caption = "圖像平鋪"

　　Command2.Caption = "隨機(jī)顯示"

　　Command3.Caption = "鏡頭伸縮"

　　Command4.Caption = "拖尾效果"

　　Command5.Caption = "退出"

　　End Sub

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