vb 改解析度的問題 - 趣味新聞網

發表日期 2008-04-12T20:58:16+08:00

     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

Const EWX_REBOOT = 2          ' 重開機
Const CCDEVICENAME = 32
Const CCFORMNAME = 32
Const DM_PELSWIDTH = &H80000
Const DM_PELSHEIGHT = &H100000

Const DISP_CHANGE_SUCCESSFUL = 0
Const DISP_CHANGE_RESTART = 1
Const CDS_UPDATEREGISTRY = 1

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 = 1280  '設定成想要的解析度
DevM.dmPelsHeight = 800
b = ChangeDisplaySettings(DevM, 0) 'Changed Only this time
If b = DISP_CHANGE_RESTART Then
ans = MsgBox("要重開機設定纔能完成，重開？", 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("設定有誤", vbCritical)
End If
End If
End Sub
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這是我從網路抓到的加以應用的，隻要加一個按鍵就能使用，
但我對其細節並不瞭解，請問有大大可以加以單步解說嗎，謝謝

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