vb.net颜色亮度 vb窗体颜色改变语句

VBNET怎么获取控件颜色的RGB值，又怎么用RGB将颜色赋给控件颜色。

R/G/B值最小是0最大是255属Byte值类型

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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

vb.net 高亮度显示文本

选中就是高亮，首先得到你找到的文本字符的起始位置和长度，然后

TextBox.Select(start,length)

或

TextBox.SelectionStart = start

TextBox.SelectionLength = length

vb.net 如何使文字能渐变颜色，就是颜色慢慢变淡然后在慢慢恢复？

也容易，如果是黑白三个颜色加上相同的渐变量，彩色的是起始颜色的三个分量与终止颜色的对应三个分量的差值，再除于相同的份数，就得出三原色各自的步进量。

窗体上放个图片框试试下面代码：

Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint

Dim startColor As Color = Color.Red

Dim endColor As Color = Color.Green

Dim s As String = "vb.net 如何使文字能渐变颜色，就是颜色慢慢变淡然后在慢慢恢复？"

Dim Steps As Integer = s.Length \ 2

Dim StepR As Integer = (CInt(endColor.R) - startColor.R) \ Steps

Dim StepG As Integer = (CInt(endColor.G) - startColor.G) \ Steps

Dim StepB As Integer = (CInt(endColor.B) - startColor.B) \ Steps

Dim R As Integer = startColor.R

Dim G As Integer = startColor.G

Dim B As Integer = startColor.B

Dim drawFont As New System.Drawing.Font("Arial", 16)

Dim X As Integer = 50

For i As Integer = 1 To Steps

Dim drawBrush As New SolidBrush(Color.FromArgb(R, G, B))

e.Graphics.DrawString(s.Substring(i - 1, 1), drawFont, drawBrush, X, 50.0)

X += 18

R += StepR

G += StepG

B += StepB

For i As Integer = 1 To Steps

Dim drawBrush As New SolidBrush(Color.FromArgb(R, G, B))

e.Graphics.DrawString(s.Substring(i + Steps - 1, 1), drawFont, drawBrush, X, 50.0)

X += 18

R -= StepR

G -= StepG

B -= StepB

End Sub

VB.NET 按下按钮变凹效果，颜色也变亮，如何实现

css

可以控制按钮的外观

也有一些外置的类去搜下可以控制外观

用VB 可以做那种用Slider 滑块来调节窗体色调和亮度的吗?(就像QQ那样)

of course.

搂主现在还在用VB6.0

都有VB.Net了

把Slider的值转换成Color，再付给窗体的BackColor就行了