原则上,只改这一次,下一次开机会还原,但如果需重开机,才会Update
Registry中的设定,并重开机。
如果要永久设定其设定值,请将
b = ChangeDisplaySettings(DevM, 0) 改成
b = ChangeDisplaySettings(DevM, CDS_UPDATEREGISTRY)
Option Explicit
Private Declare Function EnumDisplaySettings Lib "user32" Alias _
"EnumDisplaySettingsA" (ByVal lpszDeviceName As Long, _
ByVal iModeNum As Long, lpDevMode As Any) As Long
Private Declare Function ChangeDisplaySettings Lib "user32" Alias _
"ChangeDisplaySettingsA" (lpDevMode As Any, ByVal dwflags As Long) As Long
Private Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Long, _
ByVal dwReserved As Long) As Long
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 DevM As DEVMODE
Private Sub Command1_Click()
Dim i As Long
Dim b As Long
Dim ans as Long
Dim a As Long
a = EnumDisplaySettings(0, 0, DevM) 'Initial Setting
DevM.dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT
DevM.dmPelsWidth = 800 '设定成想要的分辨率
DevM.dmPelsHeight = 600
b = ChangeDisplaySettings(DevM, 0) 'Changed Only this time
If b = DISP_CHANGE_RESTART Then
ans = MsgBox("要重开机设定才能完成,重开?", vbOKCancel)
If ans = 1 Then
b = ChangeDisplaySettings(DevM, CDS_UPDATEREGISTRY)
'after this , Will Update in Registry
Call ExitWindowsEx(EWX_REBOOT, 0)
End If
Else
If b <> DISP_CHANGE_SUCCESSFUL Then
Call MsgBox("设定有误", vbCritical)
End If
End If
End Sub
'*************************************************************
'* 名称:WinMode
'* 用途:改变分辨率
'*************************************************************
Const SPI_GETWORKAREA = 48
Private Declare Function SystemParametersInfo Lib "user32" Alias "SystemParametersInfoA" (ByVal uAction As Long, ByVal uParam As Long, lpvParam As Any, ByVal fuWinIni As Long) As Long
Private Declare Function lstrcpy Lib "kernel32" Alias "lstrcpyA" (lpString1 As Any, lpString2 As Any) As Long
Const CCHDEVICENAME = 32
Const CCHFORMNAME = 32
Const DM_PELSWIDTH = &H80000
Const DM_PELSHEIGHT = &H100000
Const DM_BITSPERPEL = &H40000
'
Private Type winmode
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 lpwinmode As Long, ByVal dwflags As Long) As Long
Public Function SetDisplayMode(Width As Integer, Height As Integer, Color As Integer) As Long
Dim Newwinmode As winmode
Dim p As Long
With Newwinmode
.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
p = lstrcpy(Newwinmode, Newwinmode)
SetDisplayMode = ChangeDisplaySettings(p, 0)
End Function
nScreenWidth = Screen.Width / 15 '屏幕宽度
nScreenHeight = Screen.Height / 15 '屏幕高度
Dim K As Integer
Dim nAnswer As Long
If nScreenWidth <> 800 And nScreenHeight <> 600 Then
nAnswer = MsgBox("警告:显示器当前分辨率为 " & Trim(str(nScreenWidth)) & "x" & _
Trim(str(nScreenHeight)) & ",为使系统正常运行" & Chr(13) & _
"请将分辨率设置为 800x600 增强色(16位)" & _
",是否继续?", vbYesNo, cProgramName)
Select Case nAnswer
Case vbYes
K = SetDisplayMode(800, 600, 16)
Case vbNo
End
End Select
End If