Public Declare Function ChangeDisplaySettings Lib "user32.dll" Alias "ChangeDisplaySettingsA" (ByRef lpDevMode As DEVMODE, ByVal dwFlags As Long) As Long Public Declare Function EnumDisplaySettings Lib "user32.dll" Alias "EnumDisplaySettingsA" (ByVal lpszDeviceName As String, ByVal iModeNum As Long, ByRef lpDevMode As DEVMODE) As Long
Const DM_PELSHEIGHT As Long = &H100000 Const DM_PELSWIDTH As Long = &H80000 Const DM_BITSPERPEL As Long = &H40000 Const DM_DISPLAYFREQUENCY As Long = &H400000
Const CCHDEVICENAME As Long = 32 Const CCHFORMNAME As Long = 32 Const CDS_TEST = &H4
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
''''------------------------------------------------------------------------------------------- '''' LngWidth //屏幕的宽（单位象素） '''' LngHeight //屏幕的高（单位象素） '''' IntColor //多少位颜色（e.g 16 or 32） '''' LngFrequency //屏幕的刷新频率 '''' ''''声明： '''' 调用该函数时要确定所设置的值在系统所允许的设置范围内，比如系统的最大刷新频率位80，而你 '''' 用把LngFrequency设位85，这样将带来无法预测的后果。 ''''------------------------------------------------------------------------------------------ Public Function SetDisplaymode(LngWidth As Long, LngHeight As Long, IntColor As Integer, LngFrequency As Long) As Long Dim NewDevmode As DEVMODE Dim lngP As Long
''''obtains information EnumDisplaySettings 0&, 0&, NewDevmode
With NewDevmode .dmFields = DM_PELSHEIGHT Or DM_PELSWIDTH Or DM_BITSPERPEL Or DM_DISPLAYFREQUENCY .dmPelsWidth = LngWidth .dmPelsHeight = LngHeight .dmBitsPerPel = IntColor .dmDisplayFrequency = LngFrequency End With
SetDisplaymode = ChangeDisplaySettings(NewDevmode, CDS_TEST) End Function
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