VB.NET設(shè)置屏幕分辨率、顏色位數(shù)、刷新率 實(shí)例代碼

這篇文章介紹了VB.NET設(shè)置屏幕分辨率、顏色位數(shù)、刷新率

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實(shí)例代碼，有需要的朋友可以參考一下

復(fù)制代碼

代碼如下:

Private

Declare

Function

GetDeviceCaps

Lib

"gdi32"

(ByVal

hdc

As

Long,

ByVal

nIndex

As

Long)

As

Long

Private

Declare

Function

ChangeDisplaySettings

Lib

"user32"

Alias

"ChangeDisplaySettingsA"

(lpDevMode

As

Any,

ByVal

dwflags

As

Long)

As

Long

Private

Const

CCDEVICENAME

As

Long

=

32

Private

Const

CCFORMNAME

As

Long

=

32

Private

Const

DM_BITSPERPEL

As

Long

=

H40000

Private

Const

DM_PELSWIDTH

As

Long

=

H80000

Private

Const

DM_PELSHEIGHT

As

Long

=

H100000

Private

Const

DM_DISPLAYFLAGS

As

Long

=

H200000

Private

Const

DM_DISPLAYFREQUENCY

=

H400000

Private

Const

CDS_FORCE

As

Long

=

H80000000

Private

Const

BITSPIXEL

As

Long

=

12

Private

Const

HORZRES

As

Long

=

8

Private

Const

VERTRES

As

Long

=

10

Private

Const

VREFRESH

=

116

Private

Type

DEVMODE

dmDeviceName

As

String

*

CCDEVICENAME

dmSpecVersion

As

Integer

dmDriverVersion

As

Integer

dmSize

As

Integer

dmDriverExtra

As

Integer

dmFields

As

Long

dmOrientation

As

Integer

dmPaperSize

As

Integer

dmPaperLength

As

Integer

dmPaperWidth

As

Integer

dmScale

As

Integer

dmCopies

As

Integer

dmDefaultSource

As

Integer

dmPrintQuality

As

Integer

dmColor

As

Integer

dmDuplex

As

Integer

dmYResolution

As

Integer

dmTTOption

As

Integer

dmCollate

As

Integer

dmFormName

As

String

*

CCFORMNAME

dmUnusedPadding

As

Integer

dmBitsPerPel

As

Integer

dmPelsWidth

As

Long

dmPelsHeight

As

Long

dmDisplayFlags

As

Long

dmDisplayFrequency

As

Long

End

Type

Private

Sub

cmdChangeDesktopMode_Click()

Dim

DM

As

DEVMODE

With

DM

.dmPelsWidth

=

CInt(txtNewWidth.Text)

.dmPelsHeight

=

CInt(txtNewHeight.Text)

.dmBitsPerPel

=

CInt(txtNewColor.Text)

.dmDisplayFrequency

=

CInt(txtNewFreq.Text)

.dmFields

=

DM_PELSWIDTH

Or

DM_PELSHEIGHT

Or

DM_BITSPERPEL

Or

DM_DISPLAYFREQUENCY

.dmSize

=

LenB(DM)

End

With

If

ChangeDisplaySettings(DM,

CDS_FORCE)

Then

MsgBox

"錯(cuò)誤!不支持此模式！"

End

If

End

Sub

Private

Sub

Form_Load()

txtOldWidth.Text

=

GetDeviceCaps(Me.hdc,

HORZRES)

txtOldHeight.Text

=

GetDeviceCaps(Me.hdc,

VERTRES)

txtOldColor.Text

=

GetDeviceCaps(Me.hdc,

BITSPIXEL)

txtOldFreq.Text

=

GetDeviceCaps(Me.hdc,

VREFRESH)

End

Sub

如何用vb.net向串口發(fā)送十六位進(jìn)制數(shù)據(jù)

下面代碼就是將文本框中以一個(gè)空格隔開的十六進(jìn)制轉(zhuǎn)為字節(jié)的代碼，文本框中數(shù)字格式為：01 02 03

Dim TestArray() As String = Split(TextBox1.Text)

Dim hexBytes() As Byte

ReDim hexBytes(TestArray.Length - 1)

Dim i As Integer

For i = 0 To TestArray.Length - 1

hexBytes(i) = Val("h" TestArray(i))

Next

SerialPort.Write(hexBytes, 0, hexBytes.Length)

vb6.0安裝完成后為什么圖標(biāo)沒顯示出來

其實(shí)很簡單啦。如果你是想用作“編譯出來的程序”的圖標(biāo)，你可以先下載一個(gè)iconworkshop，打開那個(gè)ico，再添加一個(gè)16位色和8位色的圖標(biāo)（程序會(huì)自動(dòng)根據(jù)32位圖標(biāo)轉(zhuǎn)換）。

然后扔給vb，vb只認(rèn)16位色和8位色，所以這樣的圖標(biāo)就可以使用；編譯出來的程序依然會(huì)顯示原來32位圖標(biāo)。

網(wǎng)頁標(biāo)題：vb.net16位色 vb設(shè)置顏色
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