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Private Sub PictureBox1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseDown
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Dim GetColor As Color = CType(PictureBox1.Image, Bitmap).GetPixel(e.X, e.Y)
TextBox3.Text = GetColor.B.ToString
TextBox2.Text = GetColor.G.ToString
TextBox1.Text = GetColor.R.ToString
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
应改成
Label4.ForeColor = Color.FromArgb(255, 255, 255, 255)
RGB函数是这样的
Public Function RGB(Red As Integer, Green As Integer, Blue As Integer) As Integer
它返回一个Integer不是Color结构
应该用Color.FromArgb
Public Shared Function FromArgb(alpha As Integer, red As Integer, green As Integer, blue As Integer) As System.Drawing.Color
加入一个TextBox控件,一个Command控件
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