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Ignore IE Hotkeys By Using MSHTML

 Keywords:  Comcontrol Ignore Block HTML Webbrowser Browser MSHTML IE Navigate Navigation Hotkeys Keystroke Ctrl Ctrl+o Ctrl+t Ctrl+n DialogObject WriteLn

Question:

I am displaying an html page in a comcontrol but the user is able to navigate away from that page if they hit Ctrl+O. The problem is my exe is running with elevated permissions so, the user could navigate to another file and install something they shouldn't have access to. How would I block the Ctrl+O?

Answer:

Sounds like you are using the WebBrowser component to display your HTML. You could switch to the MSHTML component to display your html which does not have the ctrl+O functionality. Alternatively, you could add a navigate event handler to your dialog in a dialog callback procedure and block any navigation you do not wish the user to perform. Here is some sample code that uses the MSHTML method:
#DefineSubRoutine InitDialogConstants()
   ;DialogprocOptions Constants
   MSG_INIT=0                    ; The one-time initialization
   MSG_TIMER=1                   ; Timer event
   MSG_BUTTONPUSHED=2            ; Pushbutton or Picturebutton
   MSG_RADIOPUSHED=3             ; Radiobutton clicked
   MSG_CHECKBOX=4                ; Checkbox clicked
   MSG_EDITBOX=5                 ; Editbox or Multilinebox
   MSG_FILESELECT=6              ; Filelistbox
   MSG_ITEMSELECT=7              ; Itembox
   MSG_COMBOCHANGE=8             ; Combobox/Droplistbox
   MSG_CALENDAR=9                ; Calendar date change
   MSG_SPINNER=10                ; Spinner number change
   MSG_CLOSEVIA49=11             ; Close clicked (Enabled via DialogProcOptions 1002
   MSG_FILEBOXDOUBLECLICK=12     ; Get double-click message on a FileListBox
   MSG_ITEMBOXDOUBLECLICK=13     ; Get double-click message on an ItemBox
   MSG_COMEVENT=14               ; COMCONTROL Event notification from DialogObject (NOT DialogProcOptions)
   MSG_MENUITEM=15               ; MenuItem selected
   MSG_MENUITEMINIT=16           ; MenuItem initialized
   MSG_RESIZE=17                 ; Dialog resized
   MSG_RVITEMSELROW=18           ; Reportview item select row
   MSG_RVDBLCLICKROW=19          ; Reportview double-click row
   MSG_RVCHECKEDITEM=20          ; Reportview checked/unchecked Item
   MSG_RVITEMTEXT=21             ; Reportview changed text of first column
   MSG_RVHEADER=22               ; Reportview header clicked

   DPO_DISABLESTATE=1000         ; codes -1=GetSetting 0=EnableDialog 1=DisableDialog
   DPO_CHANGEBACKGROUND=1001     ; -1=Get Current otherise bitmap or color string
   DPO_CHANGESYSMENU=1002        ; -1=Get Current 0=none 1=close 2=close/min 3=close/max 4=close/min/max
   DPO_CHANGETITLE=1003          ; Set/Get Dialog Title - (-1 to get)
   DPO_GETNAME=1004              ; Returns the name associated with a control's number.
   DPO_GETNUMBER=1005            ; Returns the number associated with a control's name.
   DPO_GETCLIENTAREA=1007        ; Returns a space delimited list of the width and height of the client area.

   ;DialogControlState Constants
   DCSTATE_SETFOCUS=1            ; Give Control Focus
   DCSTATE_QUERYSTYLE=2          ; Query control's style
   DCSTATE_ADDSTYLE=3            ; Add control style
   DCSTATE_REMOVESTYLE=4         ; Remove control style
   DCSTATE_GETFOCUS=5            ; Get control that has focus
   DCSTATE_MOVEMOUSEOVER=6       ; Move the mouse over the control

   DCSTYLE_DEFAULT=0             ; Set Default Style
   DCSTYLE_INVISIBLE=1           ; Set Control Invisible
   DCSTYLE_DISABLED=2            ; Set Control Disabled
   DCSTYLE_NOUSERDATA=4          ; Note: Setable via DialogControlState function ONLY SPINNER control only
   DCSTYLE_READONLY=8            ; Sets control to read-only (user cannot type in data) EDITBOX MULTILINEBOX SPINNER
   DCSTYLE_PASSWORD=16           ; Sets 'password mode' where only *'s are displayed EDITBOX
   DCSTYLE_DEFAULTBUTTON=32      ; Sets a button as the default button PUSHBUTTON PICTUREBUTTON
   DCSTYLE_DIGITSONLY=64         ; Set edit box to accept digits only EDITMOX MULTILINEBOX
   DCSTYLE_FLAT=128              ; Makes a 'flat' hyperlink-looking button PUSHBUTTON PICTUREBUTTON
   DCSTYLE_NOADJUST=256          ; Turns off auto-height adjustment  ITEMBOX FILELISTBOX
   DCSTYLE_TEXTCENTER=512        ; Center text in control VARYTEXT STATICTEXT
   DCSTYLE_TEXTRIGHT=1024        ; Flush-Right text in control VARYTEXT STATICTEXT
   DCSTYLE_NOSELCURLEFT=2048     ; No selection, cursor left EDITBOX MULTILINEBOX
   DCSTYLE_NOSELCURRIGHT=4096    ; No selection, cursor right EDITBOX MULTILINEBOX
   DCSTYLE_SHIELD=8192           ; Display Security Shield icon on button (Vista only) PUSHBUTTON PICTUREBUTTON
   DCSTYLE_MENUCHECK=32768       ; Adds a check mark to the left of a menu item MENUITEM
   DCSTYLE_MENURADIO=65536       ; Adds a radio button like dot graphic to the left of a menu item MENUITEM
   DCSTYLE_MENUSEP=131072        ; Separator bar graphic MENUITEM
   DCSTYLE_MENUBREAK=262144      ; Column break MENUBAR
   DCSTYLE_NOHEADER=524288       ; No header bar REPORTVIEW
   DCSTYLE_COLHEADER=1048576     ; First row column header REPORTVIEW
   DCSTYLE_GRIDLINES=2097152     ; Grid lines REPORTVIEW
   DCSTYLE_SELONEROW=4194304     ; Only one row can be selected at a time REPORTVIEW
   DCSTYLE_SELALLROW = 8388608   ; Highlight complete row REPORTVIEW
   DCSTYLE_SORTASC=16777216      ; Ascending sort REPORTVIEW
   DCSTYLE_SORTDESC=33554432     ; Descending sort REPORTVIEW
   DCSTYLE_EDITCOL=67108864      ; Edit first columns text REPORTVIEW
   DCSTYLE_COLCHECKBOX=134217728 ; Add checkbox to first column REPORTVIEW
   DCSTYLE_INSHEADER=268435456   ; Include column header text REPORTVIEW

   ;DialogControlSet / DialogControlGet Constants
   DC_CHECKBOX=1             ; CHECKBOX REPORTVIEW
   DC_RADIOBUTTON=2          ; RADIOBUTTON
   DC_EDITBOX=3              ; EDITBOX MULTILINEBOX
   DC_TITLE=4                ; PICTURE RADIOBUTTON CHECKBOX PICTUREBUTTON VARYTEXT STATICTEXT GROUPBOX PUSHBUTTON MENUITEM
   DC_ITEMBOXCONTENTS=5      ; ITEMBOX FILELISTBOX DROPLISTBOX REPORTVIEW
   DC_ITEMBOXSELECT=6        ; ITEMBOX FILELISTBOX DROPLISTBOX REPORTVIEW
   DC_CALENDAR=7             ; CALENDAR
   DC_SPINNER=8              ; SPINNER
   DC_MULTITABSTOPS=9        ; MULTILINEBOX
   DC_ITEMSCROLLPOS=10       ; ITEMBOX FILELISTBOX
   DC_BACKGROUNDCOLOR=11     ; RADIOBUTTON CHECKBOX VARYTEXT STATICTEXT GROUPBOX PUSHBUTTON ITEMBOX FILELISTBOX DROPLISTBOX SPINNER EDITBOX MULTILINEBOX REPORTVIEW
   DC_PICTUREBITMAP=12       ; PICTURE PICTUREBUTTON
   DC_TEXTCOLOR=13           ; RADIOBUTTON CHECKBOX VARYTEXT STATICTEXT GROUPBOX PUSHBUTTON ITEMBOX FILELISTBOX DROPLISTBOX SPINNER EDITBOX MULTILINEBOX REPORTVIEW
   DC_ITEMBOXADD=14          ; ITEMBOX FILELISTBOX DROPLISTBOX REPORTVIEW
   DC_ITEMBOXREMOVE=15       ; ITEMBOX FILELISTBOX DROPLISTBOX REPORTVIEW
   DC_RADIOVALUE=16          ; RADIOBUTTON
   DC_POSITION=17            ; ALL CONTROLS (Except MENUBAR and MENUITEM)
   DC_MENUNAMES=18           ; ALL CONTROLS
   DC_HANDLE=19              ; ALL CONTROLS (Except MENUBAR and MENUITEM)
   DC_RVCOLHEAD=20           ; REPORTVIEW
   DC_RVCOLWIDTH=21          ; REPORTVIEW
   DC_RVADDCOL=22            ; REPORTVIEW
   DC_RVREMOVECOL=23         ; REPORTVIEW
   DC_RVMATCHCOL=24          ; REPORTVIEW
   DC_RVCANCELEDIT=25        ; REPORTVIEW
   DC_RVCHECKEDROWS=26       ; REPORTVIEW
   DC_RVJUSTIFY=27           ; REPORTVIEW


   ;DialogObject constants
   DLGOBJECT_ADDEVENT=1      ; Call dialog callback when the specified event occurs
   DLGOBJECT_STOPEVENT=2     ; Stop calling dialog callback when an event previously requested with
   DLGOBJECT_GETOBJECT=3     ; Return an object references to the specified control
   DLGOBJECT_GETPICTURE=4    ; Create and return an object reference to a picture object

   ;Return code constants
   RET_DO_CANCEL=0           ; Cancels dialog
   RET_DO_DEFAULT= -1        ; Continue with default processing for control
   RET_DO_NOT_EXIT= -2       ; Do not exit the dialog
   Return
#EndSubRoutine

;============================================================
;============================================================
;============================================================

#DefineFunction NoKeyNavCallbackProc(NoKeyNav_Handle,NoKeyNav_Message,NoKeyNav_Name,NoKeyNav_EventInfo,NoKeyNav_ChangeInfo)
    InitDialogConstants()                                   ; Initialize Dialog Constants
   ON_EQUAL = @TRUE                                         ; Initialize variable ON_EQUAL
   Switch NoKeyNav_Message                                  ; Switch based on Dialog Message type
      Case MSG_INIT                                         ; Standard Initialization message
         ;DialogProcOptions(NoKeyNav_Handle,MSG_TIMER,1000)
         DialogProcOptions(NoKeyNav_Handle,MSG_BUTTONPUSHED,@TRUE)
         ;DialogObject(NoKeyNav_Handle, "ComControl_1", request-code, event-name/image-file, event-id )
         objMSHTML = DialogObject(NoKeyNav_Handle,"ComControl_1",DLGOBJECT_GETOBJECT)
         html = GetHTML('http://www.winbatch.com')
         objMSHTML.Writeln(html)

         Return(RET_DO_DEFAULT)

     Case MSG_BUTTONPUSHED
        If NoKeyNav_Name == "PushButton_OK"                ; OK
              Return(RET_DO_DEFAULT)

        ElseIf NoKeyNav_Name == "PushButton_Cancel"        ; Cancel
              Return(RET_DO_CANCEL)

        EndIf                                              ; NoKeyNav_Name
        Return(RET_DO_DEFAULT)

     Case MSG_COMEVENT                                     ; ID "ComControl_1"  MSHTML:
        Return(RET_DO_DEFAULT)

   EndSwitch                                                ; NoKeyNav_Message
   Return(RET_DO_DEFAULT)
#EndFunction                                                ; End of Dialog Callback NoKeyNavCallbackProc

#DefineFunction GetHTML(url)
   ;create simple HTTP request
   objWinHttp = CreateObject("WinHttp.WinHttpRequest.5.1")
   objWinHttp.Open("GET", url, @FALSE)
   objWinHttp.Send()
   objWinHttp.WaitForResponse()
   html = objWinHttp.ResponseText
   objWinHttp = 0
   Return html
#EndFunction


NoKeyNavFormat=`WWWDLGED,6.2`

NoKeyNavCaption=`Disable Keystroke Navigation`
NoKeyNavX=002
NoKeyNavY=059
NoKeyNavWidth=766
NoKeyNavHeight=353
NoKeyNavNumControls=004
NoKeyNavProcedure=`NoKeyNavCallbackProc`
NoKeyNavFont=`DEFAULT`
NoKeyNavTextColor=`DEFAULT`
NoKeyNavBackground=`DEFAULT,DEFAULT`
NoKeyNavConfig=0

NoKeyNav001=`231,333,036,012,PUSHBUTTON,"PushButton_OK",DEFAULT,"OK",1,10,32,DEFAULT,DEFAULT,DEFAULT`
NoKeyNav002=`499,333,036,012,PUSHBUTTON,"PushButton_Cancel",DEFAULT,"Cancel",0,20,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
NoKeyNav003=`015,029,728,298,COMCONTROL,"ComControl_1",DEFAULT,"MSHTML:",DEFAULT,30,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
NoKeyNav004=`161,009,404,012,STATICTEXT,"StaticText_1",DEFAULT,"IE keystrokes are ignored: ctrl+o, ctrl+t, ctrl+e",DEFAULT,40,512,"Microsoft Sans Serif|6656|70|34","255|0|0",DEFAULT`

ButtonPushed=Dialog("NoKeyNav")

Article ID:   W17707
Filename:   Ignore IE Hotkeys By Using MSHTML.txt
File Created: 2013:09:06:08:51:00
Last Updated: 2013:09:06:08:51:00