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Visual Basic / Display / Display (cls)

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ID: 199

Viewed: 1243

Added: 2002-04-29

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Class to change the screens resolution and color depth

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Snippet By: Clint LaFever

Snippet By:	Clint LaFever
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Highlight All'------------------------------------------------------------ ' Author: Clint LaFever [lafeverc@usa.net] ' Purpose: CDISPLAY is used to change the systems display settings. ' Parameters: ' Example: '------------------------------------------------------------ Option Explicit Private Declare Function lstrcpy _ Lib "kernel32" Alias "lstrcpyA" _ (lpString1 As Any, lpString2 As Any) _ As Long Const CCHDEVICENAME = 32 Const CCHFORMNAME = 32 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 Private Declare Function ChangeDisplaySettings Lib "User32" Alias "ChangeDisplaySettingsA" ( ByVal lpDevMode As Long, ByVal dwflags As Long) As Long '- code ' Here is the function that sets the display ' mode. Width is the width of screen, Height ' is the height of screen, Color is the number ' of bits per pixel. Set the Color value to -1 ' if you only want to change the screen ' resolution. Public Function SetDisplayMode(Width As _ Integer, Height As Integer, Color As _ Integer) As Long Const DM_PELSWIDTH = &H80000 Const DM_PELSHEIGHT = &H100000 Const DM_BITSPERPEL = &H40000 Dim NewDevMode As DEVMODE Dim pDevmode As Long With NewDevMode .dmSize = 122 If Color = -1 Then .dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT Else .dmFields = DM_PELSWIDTH Or _ DM_PELSHEIGHT Or DM_BITSPERPEL End If .dmPelsWidth = Width .dmPelsHeight = Height If Color <> -1 Then .dmBitsPerPel = Color End If End With pDevmode = lstrcpy(NewDevMode, NewDevMode) SetDisplayMode = ChangeDisplaySettings(pDevmode, 0) End Function
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