ChangeVideoRes

Const DM_BITSPERPEL = &H40000
Const DM_PELSWIDTH = &H80000
Const DM_PELSHEIGHT = &H100000
Public 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
Declare Function EnumDisplaySettings Lib "user32" Alias "EnumDisplaySettingsA" (ByVal lpszDeviceName As Long, ByVal iModeNum As Long, lpDevMode As DEVMODE) As Long
Declare Function ChangeDisplaySettings Lib "user32" Alias
"ChangeDisplaySettingsA" (lpInitData As DEVMODE, ByVal dwFlags As Long) As Long
Const CCHDEVICENAME = 32
Const CCHFORMNAME = 32
La prima funzione serve ad ottenere il numero della
risoluzione disponibili per i device (schede video)
installato, mentre la seconda serve a modificare
l'impostazione del device.
E' da notare che nelle primme versioni di Win95,
e' necessario procedere ad un reboot della macchina per
ottenere il cambio della risoluzione.