将图片「非重叠显示」填满整个表格视窗
----所需物件： PictureBox 一个。
----程式码（一）：tile.bas
Declare Function BitBlt Lib "GDI" (ByVal hDestDC%, ByVal X%, ByVal Y%, _
ByVal nWidth%, ByVal nHeight%, ByVal hSrcDC%, ByVal XSrc%, ByVal YSrc%, _
ByVal dwRop&) As Integer
----程式码（二）：
Sub Form_Paint ()
Const PIXEL = 3
Picture1.ScaleMode = PIXEL
Me.ScaleMode = PIXEL
X% = 0: Y% = 0
nWidth% = Picture1.Width
nHeight% = Picture1.Height
dwRop& = &HCC0020
Do While Y% < ScaleHeight
Do While X% < ScaleWidth
Suc% = BitBlt(Me.hDC, X%, Y%, nWidth%, nHeight%, Picture1.hDC, 0, 0, dwRop&)
X% = X% + nWidth%
Loop
X% = 0
Y% = Y% + nHeight%
Loop
End Sub
