Private Declare Function lstrcpy Lib "kernel32" Alias "lstrcpyA" (lpString1 As Any, lpString2 As Any) As LongPrivate Const CCHDEVICENAME = 32Private Const CCHFORMNAME = 32Private Const ENUM_CURRENT_SETTINGS = 1Private 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 LongEnd Type
Private Declare Function ChangeDisplaySettings Lib "user32" Alias "ChangeDisplaySettingsA" (ByVal lpDevMode As Long, ByVal dwflags As Long) As LongPrivate Declare Function EnumDisplaySettings Lib "user32" Alias "EnumDisplaySettingsA" (ByVal lpszDeviceName As String, ByVal iModeNum As Long, lpDevMode As Any) As LongPrivate Declare Function GetSystemMetrics Lib "user32" (ByVal nIndex As Long) As Long
Private Const SM_CXSCREEN = 0Private Const SM_CYSCREEN = 1
Dim pNewMode As DEVMODEDim pOldMode As LongDim 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 FunctionErrorHandler: 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'窗体加一个Combobox,一个Commandbutton控件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.TwipsPerPixelXEnd Function
Private Function GetDisplayHeight() As Integer GetDisplayHeight = Screen.Height / Screen.TwipsPerPixelYEnd Function
Private Sub RestoreDisplayMode() Call SetDisplayMode(nOrgWidth, nOrgHeight, 0)End Sub
Private Sub Form_Unload(Cancel As Integer) RestoreDisplayModeEnd Sub
