Ekran çözünürlüğünü değiştirme (visual basic)

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    aslan-67
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    Ekran çözünürlüğünü değiştirme (visual basic)

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    Ekran çözünürlüğünü değiştirme (visual basic)

    Forum Alev
    Ekran çözünürlüğünü değiştirme (visual basic)


    Arkadaşlar bu programı vb de yazdıktan sonra ayarladığınız standarta ekran çözünürlüğünü değiştiriyor....


    Kod:
     Option Explicit
    Const WM_DISPLAYCHANGE = &H7E
    Const HWND_BROADCAST = &HFFFF&
    Const EWX_LOGOFF = 0
    Const EWX_SHUTDOWN = 1
    Const EWX_REBOOT = 2
    Const EWX_FORCE = 4
    Const CCDEVICENAME = 32
    Const CCFORMNAME = 32
    Const DM_BITSPERPEL = &H40000
    Const DM_PELSWIDTH = &H80000
    Const DM_PELSHEIGHT = &H100000
    Const CDS_UPDATEREGISTRY = &H1
    Const CDS_TEST = &H4
    Const DISP_CHANGE_SUCCESSFUL = 0
    Const DISP_CHANGE_RESTART = 1
    Const BITSPIXEL = 12
    Private Type DEVMODE
    dmDeviceName As String * CCDEVICENAME
    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 * CCFORMNAME
    dmUnusedPadding As Integer
    dmBitsPerPel As Integer
    dmPelsWidth As Long
    dmPelsHeight As Long
    dmDisplayFlags As Long
    dmDisplayFrequency As Long
    End Type
    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 ExitWindowsEx Lib "user32" (ByVal uFlags As Long, ByVal dwReserved As Long) As Long
    Private Declare Function GetDeviceCaps Lib "gdi32" (ByVal hdc As Long, ByVal nIndex As Long) As Long
    Private Declare Function CreateDC Lib "gdi32" Alias "CreateDCA" (ByVal lpDriverName As String, ByVal lpDeviceName As String, ByVal lpOutput As String, ByVal lpInitData As Any) As Long
    Private Declare Function DeleteDC Lib "gdi32" (ByVal hdc 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
    Dim OldX As Long, OldY As Long, nDC As Long
    Sub ChangeRes(X As Long, Y As Long, Bits As Long)
    Dim DevM As DEVMODE, ScInfo As Long, erg As Long, an As VbMsgBoxResult
    erg = EnumDisplaySettings(0&, 0&, DevM)
    DevM.dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT Or DM_BITSPERPEL
    DevM.dmPelsWidth = X
    DevM.dmPelsHeight = Y
    DevM.dmBitsPerPel = Bits
    erg = ChangeDisplaySettings(DevM, CDS_TEST)
    Select Case erg&
    Case DISP_CHANGE_RESTART
    an = MsgBox("You've to reboot", vbYesNo + vbSystemModal, "Info")
    If an = vbYes Then
    erg& = ExitWindowsEx(EWX_REBOOT, 0&)
    End If
    Case DISP_CHANGE_SUCCESSFUL
    erg = ChangeDisplaySettings(DevM, CDS_UPDATEREGISTRY)
    ScInfo = Y * 2 ^ 16 + X
    SendMessage HWND_BROADCAST, WM_DISPLAYCHANGE, ByVal Bits, ByVal ScInfo
    MsgBox "Everything's ok", vbOKOnly + vbSystemModal, "It worked!"
    Case Else
    MsgBox "Mode not supported", vbOKOnly + vbSystemModal, "Error"
    End Select
    End Sub
    
    
    Private Sub Form_Load()
    Dim nDC As Long
    OldX = Screen.Width / Screen.TwipsPerPixelX
    OldY = Screen.Height / Screen.TwipsPerPixelY
    nDC = CreateDC("DISPLAY", vbNullString, vbNullString, ByVal 0&)
    ChangeRes 600, 800, GetDeviceCaps(nDC, BITSPIXEL) 'bakaın burdan değiştiriyorsunuz
    End Sub
    Private Sub Form_Unload(Cancel As Integer)
    ChangeRes OldX, OldY, GetDeviceCaps(nDC, BITSPIXEL)
    DeleteDC nDC
    End Sub



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