vb.net调节屏幕亮度 win调节屏幕亮度

VB怎么做调节亮度的程序？代码

'下面是改变屏幕的亮度的代码。

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'新建文本文档，复制下面代码，另存为form1.frm，然后双击打开。

VERSION 5.00

Begin VB.Form Form1

Caption = "Form1"

ClientHeight = 1890

ClientLeft = 120

ClientTop = 420

ClientWidth = 5775

LinkTopic = "Form1"

ScaleHeight = 1890

ScaleWidth = 5775

StartUpPosition = 3 '窗口缺省

Begin VB.HScrollBar HScroll1

Height = 495

Left = 240

Max = 255

TabIndex = 2

Top = 480

Value = 128

Width = 5295

End

Begin VB.CommandButton Command2

Caption = "Exit"

Height = 615

Left = 2880

TabIndex = 1

Top = 1080

Width = 2655

End

Begin VB.CommandButton Command1

Caption = "Reset"

Height = 615

Left = 240

TabIndex = 0

Top = 1080

Width = 2655

End

Attribute VB_Name = "Form1"

Attribute VB_GlobalNameSpace = False

Attribute VB_Creatable = False

Attribute VB_PredeclaredId = True

Attribute VB_Exposed = False

Option Explicit

'Private Declare Function GetDeviceGammaRamp Lib "GDI32.DLL" (ByVal hDC As Long, lpRamp As Any) As Long

Private Declare Function SetDeviceGammaRamp Lib "GDI32.DLL" (ByVal hDC As Long, lpRamp As Any) As Long

Private Type Word

HiByte As Byte

LoByte As Byte

End Type

Private Type Dword

HiWord As Word

LoWord As Word

End Type

Private Type iLong

Value As Long

End Type

Private Sub Command1_Click()

HScroll1.Value = 128

End Sub

Private Sub Command2_Click()

Unload Me

End Sub

Function SetBrightness(ByVal hDC As Long, ByVal wBrightness As Integer) As Long

Dim GammaArray(255, 2) As Word

Dim hGammaDC As Long, nIndex As Long

Dim wValue As iLong, dValue As Dword

hGammaDC = hDC

If hDC = 0 Then hGammaDC = Me.hDC

If hGammaDC Then

For nIndex = 0 To 255

wValue.Value = nIndex * (wBrightness + 128)

If wValue.Value 65533 Then wValue.Value = 65533

LSet dValue = wValue

GammaArray(nIndex, 0) = dValue.HiWord

GammaArray(nIndex, 1) = dValue.HiWord

GammaArray(nIndex, 2) = dValue.HiWord

SetBrightness = SetDeviceGammaRamp(hGammaDC, GammaArray(0, 0))

End If

End Function

Private Sub Form_Unload(Cancel As Integer)

Call Command1_Click

End Sub

Private Sub HScroll1_Change()

Call SetBrightness(Me.hDC, HScroll1.Value)

Me.Caption = HScroll1.Value

End Sub

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

显示屏亮度怎么调节？显示屏亮度调节方法

显示屏亮度因使用环境的需要而进行调节，这样更有利于对我们眼睛的保护，那么如何进行显示屏亮度调节呢？今天就随我来看看显示屏亮度调节方法，以供大家参考哦。

一、显示屏亮度调节——台式机

1、打开“控制面板”，双击相应的显示器管理程序，例如本经验中的“Inter GMA Driver”。

2、在打开的“图像和媒体控制面板”窗口中，切换到“显示”选项卡。然后点击“颜色增强”项，接着就可以在右侧就可以看到亮度调节功能了，通过滑动”亮度调节滑块“就可以改变屏幕的亮度。

3、其实，更为有效快捷的方法就是通过显示器上面的按键进行调节。

在显示器面板上，有一排按键，每个按键上都标有图案。其中标有“太阳光”图案的按键通常是用来调节屏幕亮度的。

4、在调节屏幕亮度的过程中，会发现按键下方有一对方向相向的箭头，这说明通常按这一组键，可调整屏幕的亮度。

5、对于显示器屏幕上其它按钮的调节方法，大家可以参考显示器说明书或指导手册来操作。

二、显示屏亮度调节——笔记本

1、桌面空白处右键属性－在显示属性窗口，找到并单击设置选项框，在设置选项框中再次找到并单击高级按扭

2、找到选项卡最右边的显卡选项卡，点击选项卡中的启动NVIDTA控制面板。或者在开始菜单-控制面板中也是可以找到NVIDIA控制面板是一样可以打开

3、调整桌面颜色设置的设置，其中就有一项是亮度设置。这里是按百分比设置的，直接用鼠标拖即可立即生效。拖到自己调到的亮度即可。

4、注意事项：笔记本自带的系统可以直接使用Fn+方向键上的亮度大小即可调节显示器亮度(有些电脑可能不是上下的方向键，可能是F5 F6具体可以查看键盘上的图标是小太阳+和-)；如果不是笔记本自带的系统的话，而又没有NVIDTA控制面板，可以在重起电脑时，在还没有进入系统之前就直接按Fn+方向键即可调节显示器亮度

关于显示屏亮度调节的相关信息就为大家介绍到这里了，希望这篇文章对大家有所帮助。如果大家还有什么不明白的地方可以在下方给我留言哦，我们会尽快为您解答。

怎么调屏幕亮度？

可以通过以下三种方法调节屏幕亮度：

一、在使用的操作系统中调节亮度的方法（以Win10为例）：

【方法1】：点击开始菜单栏，然后依次选择设置——系统——显示选项，右侧可以看到亮度级别，用鼠标左右拖动亮度条，可以调整屏幕的亮度。

【方法2】：点击任务栏右侧里的通知功能按钮，在弹出的界面找到亮度调节功能按钮，用鼠标左键点击亮度调节功能按钮，可以实现亮度25%，50%，75%，100%四个选项的修改。

二、在使用的电脑类型中调节亮度的方法（以Lenovo笔记本为例）：

【方法一：快捷键调节】

1、目前主流的Lenovo笔记本一般通过F11、F12快捷键调节屏幕亮度。如需增加亮度可按F12，降低亮度则按F11。

使用方法：如需增加亮度则按Fn+↑；如需降低亮度则按Fn+↓。

【方法二：使用系统电源选项调节屏幕亮度】

适用范围：Win10/8.1/8/7（注：Windows XP系统不支持）

1、在任务栏右下角找到电源状态图标并单击鼠标右键，在弹出的菜单中点击“调整屏幕亮度”。

2、在弹出的电源选项窗口，使用鼠标左键拖动底部“屏幕亮度”的滑杆进行调节。

三、在使用的显卡类型中调节亮度的方法（以Intel显卡为例）

1、桌面空白处单击鼠标右键，点击“图形属性”；

2、调出界面后点击“显示器”；

3、进入显示器界面后点击“颜色设置”；

4、然后进行亮度等设置调整；

四、如果以上方法都不能调节亮度，可能是显卡驱动未安装或驱动异常，可以重装显卡驱动。

vb改屏幕亮度

下面是改变屏幕的亮度的代码。

复制下面代码，保存为form1.frm，然后双击打开，并运行，即可看到效果。

VERSION 5.00

Begin VB.Form Form1

Caption = "Form1"

ClientHeight = 3660

ClientLeft = 60

ClientTop = 450

ClientWidth = 5865

LinkTopic = "Form1"

ScaleHeight = 3660

ScaleWidth = 5865

StartUpPosition = 3 '窗口缺省

Begin VB.VScrollBar Vb

Height = 375

Left = 4920

TabIndex = 9

Top = 1680

Width = 255

End

Begin VB.VScrollBar Vg

Height = 375

Left = 4920

TabIndex = 8

Top = 1200

Width = 255

End

Begin VB.VScrollBar vr

Height = 375

Left = 4920

TabIndex = 7

Top = 720

Width = 255

End

Begin VB.VScrollBar vAll

Height = 375

Left = 4920

TabIndex = 6

Top = 240

Width = 255

End

Begin VB.TextBox tBlue

Height = 375

Left = 4200

TabIndex = 5

Top = 1680

Width = 735

End

Begin VB.TextBox tGreen

Height = 375

Left = 4200

TabIndex = 4

Top = 1200

Width = 735

End

Begin VB.TextBox tRed

Height = 375

Left = 4200

TabIndex = 3

Top = 720

Width = 735

End

Begin VB.TextBox rgbAll

Height = 375

Left = 4200

TabIndex = 2

Top = 240

Width = 735

End

Begin VB.CommandButton Command2

Caption = "设置"

Height = 495

Left = 240

TabIndex = 1

Top = 1920

Width = 1215

End

Begin VB.CommandButton Command1

Caption = "恢复"

Height = 495

Left = 240

TabIndex = 0

Top = 1320

Width = 1215

End

Begin VB.Label Label1

Caption = "蓝"

BeginProperty Font

Name = "宋体"

Size = 10.5

Charset = 134

Weight = 700

Underline = 0 'False

Italic = 0 'False

Strikethrough = 0 'False

EndProperty

ForeColor = H00FF0000

Height = 375

Index = 3

Left = 3480

TabIndex = 13

Top = 1680

Width = 375

End

Begin VB.Label Label1

Caption = "绿"

BeginProperty Font

Name = "宋体"

Size = 10.5

Charset = 134

Weight = 700

Underline = 0 'False

Italic = 0 'False

Strikethrough = 0 'False

EndProperty

ForeColor = H0000C000

Height = 375

Index = 2

Left = 3480

TabIndex = 12

Top = 1200

Width = 375

End

Begin VB.Label Label1

Caption = "红"

BeginProperty Font

Name = "宋体"

Size = 10.5

Charset = 134

Weight = 700

Underline = 0 'False

Italic = 0 'False

Strikethrough = 0 'False

EndProperty

ForeColor = H000000FF

Height = 375

Index = 1

Left = 3480

TabIndex = 11

Top = 720

Width = 375

End

Begin VB.Label Label1

Caption = "全部调整"

BeginProperty Font

Name = "宋体"

Size = 10.5

Charset = 134

Weight = 700

Underline = 0 'False

Italic = 0 'False

Strikethrough = 0 'False

EndProperty

Height = 375

Index = 0

Left = 3000

TabIndex = 10

Top = 240

Width = 975

End

Attribute VB_Name = "Form1"

Attribute VB_GlobalNameSpace = False

Attribute VB_Creatable = False

Attribute VB_PredeclaredId = True

Attribute VB_Exposed = False

Option Explicit

'Gamma Type

Private Type Gamma

Red As Integer

Green As Integer

Blue As Integer

End Type

Private GammaDay As Gamma 'Day Gamma

Private GammaNight As Gamma 'Night Gamma

'Gamma APIs

Private Ramp1(0 To 255, 0 To 2) As Integer

Private Ramp2(0 To 255, 0 To 2) As Integer

Private Declare Function GetDeviceGammaRamp Lib "gdi32" (ByVal hdc As Long, lpv As Any) As Long

Private Declare Function SetDeviceGammaRamp Lib "gdi32" (ByVal hdc As Long, lpv As Any) As Long

Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)

Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long

Private Declare Function GetDesktopWindow Lib "user32" () As Long

'Set Gamma

Public Sub SetGamma(ByVal intRed As Integer, ByVal intGreen As Integer, ByVal intBlue As Integer)

Dim i As Integer

Dim ScrDC As Long

'Get Screen's DC

ScrDC = GetDC(GetDesktopWindow)

intRed = intRed / 2

intGreen = intGreen / 2

intBlue = intBlue / 2

'Change Ramp

For i = 0 To 255

If intRed 0 Then Ramp2(i, 0) = ConvToSignedValue(ConvToUnSignedValue(Ramp1(i, 0)) * (100 - Abs(intRed)) / 100)

If intRed = 0 Then Ramp2(i, 0) = Ramp1(i, 0)

If intRed 0 Then Ramp2(i, 0) = ConvToSignedValue(65535 - ((65535 - ConvToUnSignedValue(Ramp1(i, 0))) * (100 - intRed) / 100))

If intGreen 0 Then Ramp2(i, 1) = ConvToSignedValue(ConvToUnSignedValue(Ramp1(i, 1)) * (100 - Abs(intGreen)) / 100)

If intGreen = 0 Then Ramp2(i, 1) = Ramp1(i, 1)

If intGreen 0 Then Ramp2(i, 1) = ConvToSignedValue(65535 - ((65535 - ConvToUnSignedValue(Ramp1(i, 1))) * (100 - intGreen) / 100))

If intBlue 0 Then Ramp2(i, 2) = ConvToSignedValue(ConvToUnSignedValue(Ramp1(i, 2)) * (100 - Abs(intBlue)) / 100)

If intBlue = 0 Then Ramp2(i, 2) = Ramp1(i, 2)

If intBlue 0 Then Ramp2(i, 2) = ConvToSignedValue(65535 - ((65535 - ConvToUnSignedValue(Ramp1(i, 2))) * (100 - intBlue) / 100))

'Set Gamma

SetDeviceGammaRamp ScrDC, Ramp2(0, 0)

End Sub

'Save Gamma

Public Sub SaveGamma()

Dim ScrDC As Long

'Get Screen's DC

ScrDC = GetDC(GetDesktopWindow)

'Reset it

GetDeviceGammaRamp ScrDC, Ramp1(0, 0)

End Sub

'RestoreGamma

Public Sub RestoreGamma()

Dim ScrDC As Long

'Get Screen's DC

ScrDC = GetDC(GetDesktopWindow)

'Reset it

SetDeviceGammaRamp ScrDC, Ramp1(0, 0)

End Sub

Private Function ConvToSignedValue(lngValue As Long) As Integer

'Cheezy method for converting to signed integer

If lngValue = 32767 Then

ConvToSignedValue = CInt(lngValue)

Exit Function

End If

ConvToSignedValue = CInt(lngValue - 65535)

End Function

Private Function ConvToUnSignedValue(intValue As Integer) As Long

'Cheezy method for converting to unsigned integer

If intValue = 0 Then

ConvToUnSignedValue = intValue

Exit Function

End If

ConvToUnSignedValue = intValue + 65535

End Function

Private Sub Command1_Click()

rgbAll.Text = 0

Command2_Click

'GammaDay.Red = 0

'GammaDay.Green = 0

'GammaDay.Blue = 0

'SetGamma GammaDay.Red, GammaDay.Green, GammaDay.Blue

End Sub

Private Sub Command2_Click()

GammaNight.Red = Val(tRed.Text)

GammaNight.Green = Val(tGreen.Text)

GammaNight.Blue = Val(tBlue.Text)

SetGamma GammaNight.Red, GammaNight.Green, GammaNight.Blue

End Sub

Private Sub Form_Load()

SaveGamma

rgbAll.Text = vAll.Value

tRed.Text = vr.Value

tGreen.Text = Vg.Value

tBlue.Text = Vb.Value

End Sub

Private Sub Form_Unload(Cancel As Integer)

RestoreGamma

End Sub

Private Sub rgbAll_Change()

tRed.Text = rgbAll.Text

tGreen.Text = rgbAll.Text

tBlue.Text = rgbAll.Text

End Sub

Private Sub vAll_Change()

rgbAll.Text = vAll.Value

End Sub

Private Sub vr_Change()

tRed.Text = vr.Value

End Sub

Private Sub vg_Change()

tGreen.Text = Vg.Value

End Sub

Private Sub vb_Change()

tBlue.Text = Vb.Value

End Sub

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