这是我不久前下载 VS2005 时使用 VB.Net 尝试写出来的功能，分享出来给各位参考使用，
希望对各位有用，如果各位觉得不错，烦请赏我一朵花好吗

下面的 Form 里面，只有一个 Label 及两个 Button 元件而已：
Public Class Form1

Private Const CCDEVICENAME As Short = 32
Private Const CCFORMNAME As Short = 32
Private Const DM_PELSWIDTH As Integer = &H80000
Private Const DM_PELSHEIGHT As Integer = &H100000
'更新萤幕扫瞄频率常数
Private Const DM_DISPLAYFREQUENCY As Integer = &H400000

'宣告要使用的 API 函式
Private Declare Function EnumDisplaySettings Lib "user32" Alias "EnumDisplaySettingsA" (ByVal lpszDeviceName As Integer, ByVal iModeNum As Integer, ByRef lpDevMode As DEVMODE) As Boolean

'宣告要使用的 API 函式
Private Declare Function ChangeDisplaySettings Lib "user32" Alias "ChangeDisplaySettingsA" (ByRef lpDevMode As DEVMODE, ByVal dwflags As Integer) As Integer

'定义要使用的变数结构
Private Structure DEVMODE
<VBFixedString(CCDEVICENAME), System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst:=CCDEV ..

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你确定是 "你自己写的" ?

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       ' 重开机
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 = 800   '设定成想要的解析度
  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

变数名称都相同.......不太可能吧
我想我应该不用说出原文在那, 除非那个原文是你做的.

下面是引用chen9999于2006-06-19 23:47发表的 :
你确定是 "你自己写的" ?

变数名称都相同.......不太可能吧
我想我应该不用说出原文在那, 除非那个原文是你做的.

您贴的那一篇我在大陆网站也有看过，好多地方都有的，
我并没有说我是原创，我只是说我使用 VB.Net 2005 尝试写出来，将它分享出来而已，
这功能的教学资料在网路上许多地方都找的到的，如下面的网址都是：

http://www.microsoft.com/china...lumn/28.mspx
http://www.aspxboy.com/pri...fault.aspx
http://www.faq-it.org/archives/vb/97a...3266830b0fcc.php

但那些都不是 VB.Net 2005 的范例，虽然语法差不多，但还是没有完全一样，
因此我分享的是我改成 2005 能用的版本。

补充：
ChangeDisplaySettings() 是一个 API 而已，原创是微软，从 Win98 的时候就存在，
VB 的用法较复杂，相较之下，BCB 的用法就简单多了，如下几行就可以达成了：

DEVMODE DevM;
EnumDisplaySettings(0, 0, &DevM);
DevM.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
DevM.dmPelsWidth = 1024; // 设定解析度
DevM.dmPelsHeight = 768;
ChangeDisplaySettings(&DevM, 0);

看来我还是不要贴 VB 的范例好了，因为网路上太好找了。

但这都针对一个萤幕，哪如何变更第二台萤幕的解析度呢?

这真是对我太有用了

复制程式 建议：Dim DevM As DEVMODE
改成：Dim DevM As New DEVMODE

避免发生 Null

感谢你分享,这对我很有用