189 8069 5689
加入一个TextBox控件,一个Command控件
目前创新互联已为1000多家的企业提供了网站建设、域名、虚拟空间、成都网站托管、企业网站设计、和龙网站维护等服务，公司将坚持客户导向、应用为本的策略，正道将秉承"和谐、参与、激情"的文化，与客户和合作伙伴齐心协力一起成长，共同发展。
代码:
Private Declare Function GetPixel Lib "gdi32" (ByVal hDC As Long, ByVal X As Long, ByVal Y As Long) As Long
Private Declare Function GetWindowDC Lib "user32" (ByVal hWnd As Long) As Long
Private Sub Command1_Click()
Dim Color As Long
WindowDC = GetWindowDC(0) '获取屏幕的设备场景
Color = GetPixel(WindowDC, 500, 100) '获指定点的颜色
'分解RGB颜色值
R = (Color Mod 256) '红色
b = (Int(Color \ 65536)) '蓝色
G = ((Color - (b * 65536) - R) \ 256) '绿色
Text1.BackColor = RGB(R, G, b)
End Sub
R/G/B值最小是0最大是255属Byte值类型
Dim cr As Color = 控件.BackColor '获取控件背景色
Dim alpha As Byte = cr.A '透明度
Dim R As Byte = cr.R 'R值
Dim G As Byte = cr.G 'G值
Dim B As Byte = cr.B 'B值
Dim outAcr As Color = Color.FromArgb(alpha, R, G, B) '创建带有透明通道的ARGB颜色
Dim outcr As Color = Color.FromArgb(R, G, B) '创建不透明的RGB颜色
将控件的背景色设为透明即可： 如Label1.BackColor=Color.Transparent 当然，还有别的方式可使底色透明，你自已琢磨一下。
VB可使用Point方法来获取图片指定点的颜色。
Point 方法
按照长整数，返回在 Form 或 PictureBox 上所指定磅的红-绿-蓝 (RGB) 颜色。
语法
object.Point(x, y)
'窗体判色代码:
Private Sub Form1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
Text1 = X
Text2 = Y
Text3 = Point(X, Y)
Text4 = (Val(Text3) Mod 65536) Mod 256 'Red
Text5 = (Val(Text3) Mod 65536) \ 256 'Green
Text6 = Val(Text3) \ 65536 'Blue
Shape1.FillColor = RGB(Val(Text4), Val(Text5), Val(Text6))
End Sub
'PictureBox判色代码:
Private Sub Picture1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
Text1 = X
Text2 = Y
Text3 = Picture1.Point(X, Y)
Text4 = (Val(Text3) Mod 65536) Mod 256 'Red
Text5 = (Val(Text3) Mod 65536) \ 256 'Green
Text6 = Val(Text3) \ 65536 'Blue
Shape1.FillColor = RGB(Val(Text4), Val(Text5), Val(Text6))
End Sub