如何修改显示器的分辨率？

[ouyangke]

例如：现在显示器的分辨率是：800*600。控制它变成：640*480
同时在程序结束时把它变回：800*600

[ouyangke]

很简单吧！看谁动作快啦，哈哈~~~~

[Ninputer]

Private Declare Function lstrcpy Lib "kernel32" Alias "lstrcpyA" (lpString1 As Any, lpString2 As Any) As Long
Private Const CCHDEVICENAME = 32
Private Const CCHFORMNAME = 32
Private Const ENUM_CURRENT_SETTINGS = 1
Private Type DEVMODE
dmDeviceName As String * CCHDEVICENAME
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 * CCHFORMNAME
dmUnusedPadding As Integer
dmBitsPerPel As Long
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
End Type

Private Declare Function ChangeDisplaySettings Lib "user32" Alias "ChangeDisplaySettingsA" (ByVal lpDevMode As Long, ByVal dwflags As Long) As Long
Private Declare Function EnumDisplaySettings Lib "user32" Alias "EnumDisplaySettingsA" (ByVal lpszDeviceName As String, ByVal iModeNum As Long, lpDevMode As Any) As Long
Private Declare Function GetSystemMetrics Lib "user32" (ByVal nIndex As Long) As Long

Private Const SM_CXSCREEN = 0
Private Const SM_CYSCREEN = 1

Dim pNewMode As DEVMODE
Dim pOldMode As Long
Dim nOrgWidth As Integer, nOrgHeight As Integer

'设置显示器分辨率的执行函数
Private Function SetDisplayMode(Width As Integer, Height As Integer, Color As Integer) As Long ', Freq As Long) As Long
On Error GoTo ErrorHandler
Const DM_PELSWIDTH = &H80000
Const DM_PELSHEIGHT = &H100000
Const DM_BITSPERPEL = &H40000
Const DM_DISPLAYFLAGS = &H200000
Const DM_DISPLAYFREQUENCY = &H400000
With pNewMode
.dmSize = Len(pNewMode)
If Color = 0 Then 'Color = 0 时不更改屏幕颜色
.dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT
Else
.dmFields = DM_BITSPERPEL Or DM_PELSWIDTH Or DM_PELSHEIGHT 'Or DM_DISPLAYFREQUENCY'属性率的更改还是没办法,不过,不加入此DM_DISPLAYFREQUENCY这个参数,只要系统支持,应该不会更改刷新率的
End If
.dmPelsWidth = Width
.dmPelsHeight = Height
If Color <> 0 Then
.dmBitsPerPel = Color
End If
End With
pOldMode = lstrcpy(pNewMode, pNewMode)
SetDisplayMode = ChangeDisplaySettings(pOldMode, 1)
Exit Function
ErrorHandler:
MsgBox Err.Description, vbCritical, "VB广场"
End Function

Private Sub Command1_Click()
Dim nWidth As Integer, nHeight As Integer, nColor As Integer
Select Case Combo1.ListIndex
Case 0
nWidth = 640: nHeight = 480: nColor = 16 '640*480*16位真彩色,256色nColor = 8,16色nColor = 4,nColor = 0 表示不改变颜色
Case 1
nWidth = 640: nHeight = 480: nColor = 24
Case 2
nWidth = 640: nHeight = 480: nColor = 32
Case 3
nWidth = 800: nHeight = 600: nColor = 16
Case 4
nWidth = 800: nHeight = 600: nColor = 24
Case 5
nWidth = 800: nHeight = 600: nColor = 32
Case 6
nWidth = 1024: nHeight = 768: nColor = 16
Case 7
nWidth = 1024: nHeight = 768: nColor = 24
Case 8
nWidth = 1024: nHeight = 768: nColor = 32
Case other
nWidth = 800: nHeight = 600: nColor = 16
End Select
Call SetDisplayMode(nWidth, nHeight, nColor) '注意,系统不支持的显示模式不能选,否则,准备用安全模式重启动吧.API函数EnumDisplaySettings可以选择系统支持的模式,自己去写吧,也很简单.如果你还有什么问题,请给我发信或留言.
End Sub

Private Sub Form_Load()
Combo1.AddItem "640*480*16位真彩色"
Combo1.AddItem "640*480*24位真彩色"
Combo1.AddItem "640*480*32位真彩色"
Combo1.AddItem "800*600*16位真彩色"
Combo1.AddItem "800*600*24位真彩色"
Combo1.AddItem "800*600*32位真彩色"
Combo1.AddItem "1024*768*16位真彩色"
Combo1.AddItem "1024*768*24位真彩色"
Combo1.AddItem "1024*768*32位真彩色"
Combo1.Text = Combo1.List(0)
nOrgWidth = GetDisplayWidth
nOrgHeight = GetDisplayHeight
'nOrgWidth = GetSystemMetrics(SM_CXSCREEN)'两种获取初始屏幕大小的方法均可
'nOrgHeight = GetSystemMetrics(SM_CYSCREEN)
End Sub

Private Function GetDisplayWidth() As Integer
GetDisplayWidth = Screen.Width \ Screen.TwipsPerPixelX
End Function

Private Function GetDisplayHeight() As Integer
GetDisplayHeight = Screen.Height \ Screen.TwipsPerPixelY
End Function

Private Sub RestoreDisplayMode()
Call SetDisplayMode(nOrgWidth, nOrgHeight, 0)
End Sub

Private Sub Form_Unload(Cancel As Integer)
RestoreDisplayMode
End Sub

[masterz]

The ChangeDisplaySettings function changes the settings of the default display device to the specified graphics mode.

To change the settings of a specified display device, use the ChangeDisplaySettingsEx function.

LONG ChangeDisplaySettings(
LPDEVMODE lpDevMode, // graphics mode
DWORD dwflags // graphics mode options
);

[zhuzhichao]

Private Declare Function lstrcpy Lib "kernel32" Alias "lstrcpyA" (lpString1 As Any, lpString2 As Any) As Long
Const CCHDEVICENAME = 32
Const CCHFORMNAME = 32
Private Type DEVMODE
dmDeviceName As String * CCHDEVICENAME
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 * CCHFORMNAME
dmUnusedPadding As Integer
dmBitsPerPel As Integer
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
End Type
Private Declare Function _
ChangeDisplaySettings Lib _
"User32" Alias "ChangeDisplaySettingsA" (_
ByVal lpDevMode As Long, _
ByVal dwflags As Long) As Long
'函数
Public Function SetDisplayMode(Width As _
Integer,Height As Integer, Color As _
Integer) As Long
Const DM_PELSWIDTH = &H80000
Const DM_PELSHEIGHT = &H100000
Const DM_BITSPERPEL = &H40000
Dim NewDevMode As DEVMODE
Dim pDevmode As Long
With NewDevMode
.dmSize = 122
If Color = -1 Then
.dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT
Else
.dmFields = DM_PELSWIDTH Or _
DM_PELSHEIGHT Or DM_BITSPERPEL
End If
.dmPelsWidth = Width
.dmPelsHeight = Height

If Color <> -1 Then
.dmBitsPerPel = Color
End If
End With
pDevmode = lstrcpy(NewDevMode, NewDevMode)
SetDisplayMode = ChangeDisplaySettings(pDevmode, 0)
End Function
例子调用：改变为 640x480x24位：
i = SetDisplayMode(640, 480, 24)

[zhuzhichao]

http://www.csdn.net/expert/Topic/100/100268.shtm

[zhuzhichao]

http://www.csdn.net/expert/Topic/27/27048.shtm