RIsoluzioni con VisualBasic

[bprogram]

Voglio sapere due cose rigardante la risoluzione in visalbasic.


1. Vorrei sapere come posso fare che per esempio la risoluzione dello schermo sta a 800X600 Il RichTextBox a una grandezza che poi assegnerò io ma se cambia risoluzione deve gambiare anche la grandezza del RichTextBox.


2. Come posso fare che premendo un pulsante cambia la risoluzione dello schermo sempre da me stabilita.

NAturalmente mi interessa più la prima non ce molto bisogno che rispondiate alla seconda.



Grazie bonaProgram

[xegallo]

1 per saper la risoluzione corrente

Private Sub Form_Load()
    MsgBox "La risoluzione del monitor é " & _
        Screen.Width / Screen.TwipsPerPixelX & " X " & _
        Screen.Height / Screen.TwipsPerPixelX
End Sub

2

Declare Function EnumDisplaySettings Lib "user32" _
    Alias "EnumDisplaySettingsA" _
    (ByVal lpszDeviceName As Long, _
    ByVal iModeNum As Long, _
    lpDevMode As Any) As Boolean
Declare Function ChangeDisplaySettings Lib "user32" _
    Alias "ChangeDisplaySettingsA" _
    (lpDevMode As Any, ByVal dwFlags As Long) As Long
Declare Function ExitWindowsEx Lib "user32" _
    (ByVal uFlags As Long, ByVal dwReserved As Long) _
    As LongPublic Const EWX_LOGOFF = 0
Public Const EWX_SHUTDOWN = 1
Public Const EWX_REBOOT = 2
Public Const EWX_FORCE = 4
Public Const CCDEVICENAME = 32
Public Const CCFORMNAME = 32
Public Const DM_BITSPERPEL = &H40000
Public Const DM_PELSWIDTH = &H80000
Public Const DM_PELSHEIGHT = &H100000
Public Const CDS_UPDATEREGISTRY = &H1
Public Const CDS_TEST = &H4
Public Const DISP_CHANGE_SUCCESSFUL = 0
Public Const DISP_CHANGE_RESTART = 1
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
'Esempio
'Modificare la risoluzione a 640x480 con i colori correnti.
Dim DevM As DEVMODE
erg& = EnumDisplaySettings(0&, 0&, DevM)
DevM.dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT 'O DM_BITSPERPEL
DevM.dmPelsWidth = 640 'ScreenWidth
DevM.dmPelsHeight = 480 'ScreenHeight
Case DISP_CHANGE_RESTART
an = MsgBox("Vuoi eseguire il Reboot ?", vbYesNo + vbSystemModal, "Info")
if an = vbYes Then
    erg& = ExitWindowsEx(EWX_REBOOT, 0&)
End If
Case DISP_CHANGE_SUCCESSFUL
erg& = ChangeDisplaySettings(DevM, CDS_UPDATEREGISTRY)
MsgBox "Modifica ok", vbOKOnly + vbSystemModal, "Eseguito!"
Case Else
MsgBox "Modalita non supportata", vbOKOnly + vbSystemModal, "Errore"
End Select
End Sub

[DanieleC88]

Attenzione: Se usi CDS_UPDATEREGISTRY le informazioni relative allo schermo verranno salvate e potresti sconvelgere le impostazioni precedenti. Meglio usare CDS_FULLSCREEN.

bye bye
NTH Labs