sjh> Smid et svar :-)
Så er projektet midlertidigt færdigt (virker i XP, skal teste og rette med Windows 98 SE).. jeg kunne ikke finde noget kode, der automatisk slettede en enhed..
Så jeg brugte SendKeys.. denne kode er vist ikke 100% sikker, da der kan komme fejl, og den måske (tror det dog ikke) sletter en anden enhed, end den den skal :-)
Her er ideen:
- "System Properties" > "Hardware"-fanen poppes up via kode, tak til:
http://www.vbexplorer.com/VBExplorer/shellcpl.htm- Der tabbes ned til "Device Manager"-knappen, og der sendes et " " (space), der så åbner "Device Manager"
- "System Properties" lukkes ved at tabbe ned til Cancel, og space sendes
-- Da det tager tid, at udfører handlingerne, bruge jeg en timer, med et interval på XXXXXXX
- Pos = 1 (pos = position): skal "Monitors" markeres, og derefter åbnes
- Pos = 2: "HL-7770A" (enhedsnavnet på min eksterne monitor) markeres, og "DEL" sendes, hvorefter space bekræfter sletningen
- Pos = 3: Lukning af "Device Manager", man kan ikke klikke Cancel/Escape, og ALT+F4-SendKeys-kombinationen virker vist ikke altid.. derfor sendes ALT+F og derefter X
Herefter sættes "Pos" til 0
- Hver gang timer-koden udføres, checkes om pos = 0.. hvis den er det, disables timeren, og skift-opløsning-koden kaldes:
Call ChangeRes(1280, 1024, 32) (opløsning på 1280x1024, med 32 bit farver)
Som det er nu, aktiveres koden via en knap der hedder "cmdDM"..
-------------------- koden --------------------
Option Explicit
Dim pos As Integer
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
Private Sub cmdDM_Click()
Shell "rundll32.exe shell32.dll,Control_RunDLL sysdm.cpl,,2" ' System Properties, "Hardware"-tab
AppActivate "System Properties", False ' focus on System Properties
' "Add Hardware Wizard"-button is selected by default
SendKeys vbTab ' "Driver signing"-button selected
SendKeys vbTab ' "Device Manager"-button selected
SendKeys " " ' space = open "Device Manager"
' close System Properties:
SendKeys vbTab '
SendKeys vbTab '
SendKeys vbTab '
SendKeys " " ' "Cancel"-button selected, space = close "System Properties"
pos = 1
tmr.Enabled = True
End Sub
Private Sub tmr_Timer()
Select Case pos
Case 1
SendKeys vbTab
SendKeys "Monitors"
SendKeys "{RIGHT}"
pos = 2
Case 2
' "Monitors" is selected.. pressing "DEL" does nothing
SendKeys "HL-7770A"
SendKeys "{DEL}"
SendKeys " " ' space = OK to "delete unit HL-7770A", if it exists
tmr.Interval = 3000
pos = 3
Case 3
SendKeys "%{F}" ' File menu
SendKeys "X" ' eXit option in File menu
pos = 0
End Select
If pos = 0 Then
tmr.Enabled = False
Call ChangeRes(1280, 1024, 32)
End If
End Sub
Private Sub Form_Load()
'KPD-Team 1999
'URL:
http://www.allapi.net/ 'E-Mail: KPDTeam@Allapi.net
Dim nDC As Long
'retrieve the screen's resolution
OldX = Screen.Width / Screen.TwipsPerPixelX
OldY = Screen.Height / Screen.TwipsPerPixelY
'Create a device context, compatible with the screen
nDC = CreateDC("DISPLAY", vbNullString, vbNullString, ByVal 0&)
End Sub
Sub ChangeRes(X As Long, Y As Long, Bits As Long)
Dim DevM As DEVMODE, ScInfo As Long, erg As Long, an As VbMsgBoxResult
'Get the info into DevM
erg = EnumDisplaySettings(0&, 0&, DevM)
'This is what we're going to change
DevM.dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT Or DM_BITSPERPEL
DevM.dmPelsWidth = X 'ScreenWidth
DevM.dmPelsHeight = Y 'ScreenHeight
DevM.dmBitsPerPel = Bits '(can be 8, 16, 24, 32 or even 4)
'Now change the display and check if possible
erg = ChangeDisplaySettings(DevM, CDS_TEST)
'Check if succesfull
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
'Notify all the windows of the screen resolution change
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
