12-30-2011، 03:45 PM
کد:
'The API's:
Private Declare Function EnumDisplaySettings Lib "user32.dll" Alias "EnumDisplaySettingsA" _
(ByVal lpszDeviceName As Long, ByVal iModeNum As Long, lpDevMode As Any) As Boolean
Private Declare Function ChangeDisplaySettings Lib "user32.dll" Alias "ChangeDisplaySettingsA" _
(lpDevMode As Any, ByVal dwFlags As Long) As Long
Private Declare Function SendMessage Lib "user32.dll" Alias "SendMessageA" _
(ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
'Types:
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
'Now the function itself:
Public Function changeResolution (ByVal width As Integer, ByVal height As Integer)
Dim dev As DEVMODE
EnumDisplaySettings 0, 0, dev
dev.dmFields = &H80000 Or &H100000
dev.dmPelsWidth = width
dev.dmPelsHeight = height
ChangeDisplaySettings dev, &H4
Call ChangeDisplaySettings(dev, &H1)
Call SendMessage(&HFFFF&, &H7E&, 42, ByVal 0&)
End Function
'Use: changeResolution (width, height)
'Example: changeResolution (1024,768)