Changer les paramètres d'affichage

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Contenu du snippet

ResolutionEcran permet :
-Changement de résolution (800x600...)
-Changement de fréquence de rafraichissement (60Hz)
-Changement de qualité couleur (16 couleurs, 256 couleurs, High Color, True Color)

CurrentDisplaySettings permet de recupérer les param. actuels

Source / Exemple : 


'A mettre dans un module
Option Explicit

Private Declare Function EnumDisplaySettings Lib "user32" Alias "EnumDisplaySettingsA" (ByVal lpszDeviceName As Long, ByVal iModeNum As Long, lpDevMode As Any) As Boolean
Private Declare Function ChangeDisplaySettings Lib "user32" Alias "ChangeDisplaySettingsA" (lpDevMode As Any, ByVal dwflags As Long) As Long
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Declare Function GetDesktopWindow Lib "user32" () As Long

Private Const CCDEVICENAME = 32
Private Const CCFORMNAME = 32
Private Const DM_BITSPERPEL = &H40000
Private Const DM_PELSWIDTH = &H80000
Private Const DM_PELSHEIGHT = &H100000
Private Const CDS_UPDATEREGISTRY = &H1
Private Const CDS_TEST = &H4
Private Const DISP_CHANGE_SUCCESSFUL = 0
Private Const DISP_CHANGE_RESTART = 1
Private Const ENUM_CURRENT_SETTINGS = &HFFFF - 1
Private Const WM_DEVMODECHANGE = &H1B
Private Const HWND_BROADCAST = &HFFFF&
Private Const HWND_DESKTOP = 0

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

Dim dmEcran As DEVMODE
Dim dmType As DEVMODE

Public Function CurrentDisplaySettings() As DEVMODE
Call EnumDisplaySettings(0&, ENUM_CURRENT_SETTINGS, CurrentDisplaySettings)
End Function

Public Sub ResolutionEcran(sgWidth As Long, sgHeight As Long, FrequenceRefresh As Long, QColor As Long)
    dmEcran.dmSize = LenB(dmEcran)
    Call EnumDisplaySettings(0&, ENUM_CURRENT_SETTINGS, dmEcran)
    dmEcran.dmPelsWidth = sgWidth
    dmEcran.dmPelsHeight = sgHeight
    dmEcran.dmDisplayFrequency = FrequenceRefresh 'en Hz
    '4 : 16 colors
    '8 : 256 colors
    '16 : High Color
    '24 : True Color
    '32 : True Color
    dmEcran.dmBitsPerPel = QColor
    Call ChangeDisplaySettings(dmEcran, CDS_UPDATEREGISTRY)
    Call SendMessage(HWND_BROADCAST, WM_DEVMODECHANGE, 0, 0)
    Call SendMessage(GetDesktopWindow, WM_DEVMODECHANGE, 0, 0)
End Sub

Conclusion :


Je l'ai testé sous XP mais je sais pas si il marche sous les autres Win.

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