如何更改螢幕顯示頻率(Frequency)?
如何使用程式更改顯示器更新頻率
' 列舉顯示器設定
Private Declare Function EnumDisplaySettings Lib "user32" Alias "EnumDisplaySettingsA" _
(ByVal lpszDeviceName As Long, ByVal iModeNum As Long, lpDevMode As Any) As Long
' 改變顯示器設定
Private Declare Function ChangeDisplaySettings Lib "user32" Alias "ChangeDisplaySettingsA" _
(lpDevMode As Any, ByVal dwflags As Long) As Long
' 自定型態 (結構)
Private Type DevMode
dmDeviceName As String * 32
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 * 32
dmUnusedPadding As Integer
dmBitsPerPel As Integer
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
End Type
Private Sub cmd設定_Click()
Dim DevX As DevMode ' Device Mode
EnumDisplaySettings 0, 0, DevX ' 列舉顯示器設定
' 設定更改顯示器頻率攔位
DevX.dmFields = &H400000 ' DM_DISPLAYFREQUENCY
DevX.dmDisplayFrequency = 75 ' 設定螢幕更新頻率 xx KHz
ChangeDisplaySettings DevX, 1 ' 改變設定
End Sub