XProfan

 $H windows.ph
 $H structs.ph
 $H messages.ph
 $H commctrl.ph
 $H shellapi.ph
Declare BBPSettings$,HSettings$,WSettings$,X&
Declare Dev#,Static&,CB&,Dummy$,OK&,Change&,Ende&,GC&,F$

Proc GetCurrentSettings

    Declare RetString$,c$,whx$,why$,co$
    c$   = Str$(~GetDeviceCaps(~GetDC(0),~BITSPIXEL))
    whx$ = Str$(~GetDeviceCaps(~GetDC(0),~HORZRES))
    why$ = Str$(~GetDeviceCaps(~GetDC(0),~VERTRES))

    If c$ = 4

        co$ = 16 Farben

    ElseIf c$ = 8

        co$ = 256 Farben

    ElseIf c$ = 16

        co$ = HightColor

    ElseIf c$ = 32

        co$ = TrueColor

    EndIf

    Retstring$ = whx$ +  *  + why$ +   -   + co$
    Return Retstring$

EndProc

Proc EnumDisplay

    Declare F$,DD$

    While ~EnumDisplaySettings(0,X&,Dev#)

        If Long(Dev#,104) = 4

            F$ = 16 Farben

        ElseIf Long(Dev#,104) = 8

            F$ = 256 Farben

        ElseIf Long(Dev#,104) = 16

            F$ = HightColor

        ElseIf Long(Dev#,104) = 32

            F$ = TrueColor

        EndIf

        BBPSettings$ = BBPSettings$ + Str$(Long(Dev#,104))+|
        HSettings$ = HSettings$ + Str$(Long(Dev#,108))+|
        WSettings$ = WSettings$ + Str$(Long(Dev#,112))+|
        DD$ = Str$(Long(Dev#,108)) +  *  + Str$(Long(Dev#,112)) +   -   + F$
        AddChoice(CB&,DD$)
        Inc X&

    Wend

EndProc

WindowStyle 20
Window 10,10-250,150
cls ~GetSysColor(~COLOR_BTNFACE)
SetDialogFont ~GetStockObject(~DEFAULT_GUI_FONT)
Dummy$ = GetCurrentSettings()
Static& = Create(TEXT,%hwnd,Current Settings : +Dummy$,10,10,300,24)
CB& = ~CreateWindowEx($200,COMBOBOX,,~WS_CHILD | ~WS_VISIBLE | ~CBS_DROPDOWN | ~WS_VSCROLL ,10,40,220,300,%hwnd,100,%hInstance,0)
SendMessage(CB&,~WM_SETFONT,~GetStockObject(~DEFAULT_GUI_FONT),1)
OK& = Create(BUTTON,%hwnd,Ende,10,70,80,24)
Change& = Create(BUTTON,%hwnd,Change,150,70,80,24)
Dim Dev#,156
EnumDisplay()
SendMessage(CB&,~CB_SETCURSEL,SendMessage(CB&,~CB_FINDSTRING,0,ADDR(Dummy$)),0)

WhileNot Ende&

    Waitinput

    If GetFocus(Change&)

        SetFocus(%hwnd)
        GC& = SendMessage(CB&,~CB_GETCURSEL,0,0)
        Long Dev#,40 = ~DM_PELSHEIGHT | ~DM_PELSWIDTH | ~DM_BITSPERPEL
        Long Dev#,104 = Val(Substr$(BBPSettings$,GC&+1,|))
        Long Dev#,108 = Val(Substr$(HSettings$,GC&+1,|))
        Long dev#,112 = Val(Substr$(WSettings$,GC&+1,|))

        If GetText$(CB&) <> Mid$(GetText$(Static&),20,100)

            If ~ChangeDisplaySettings(Dev#,~CDS_UPDATEREGISTRY) = ~DISP_CHANGE_RESTART

                If Long(Dev#,104) = 4

                    F$ = 16 Farben

                ElseIf Long(Dev#,104) = 8

                    F$ = 256 Farben

                ElseIf Long(Dev#,104) = 16

                    F$ = HightColor

                ElseIf Long(Dev#,104) = 32

                    F$ = TrueColor

                EndIf

                SetText Static&,Current Settings :  + Str$(Long(Dev#,108)) +  *  + Str$(Long(Dev#,112)) +   -   + F$
                External(setupapi.dll,SetupPromptReboot,0,0,0)

            Else

                SetText Static&,Current Settings : +GetCurrentSettings()

            Endif

        Else

            MessageBox(Auflösung muss nicht geändert werden,Meldung,0)

        Endif

    ElseIf GetFocus(OK&)

        Dispose Dev#
        Ende& = 1

    Endif