What parameters does PB use internally to create windows?

[Sparkie]

@Netmaestro: Thank you...You ain't too bad yourself my friend.

@AND51: You can pick and choose which MessageRequesters to hook. You just call the SetWindowsHookEx() as needed prior to using MessageRequester().

I'll clean this up and make it more user friendly later this weekend.

[AND51]

Although I don't want to get everything served, but I would appreciate it, if you can made one or two procedures out of this code.

I would like to have a procedure that replaces my MessageRequester(). Furthemore, I think, you cannot overcome the Hook-callback, so therefor you need an additional procedure.

If you want I can try it on my own. I have some experience with API; however, there are many new API-commands and I must look up each of them which makes me processing the code more slowly.

All in all, I thank you a lot! THANK YOU! I also post this code and a lin to this thread to the german forum: [http://www.purebasic.fr/german/viewtopic.php?t=10825]

[AND51]

I've got a furhter question: Can you auto-locate the checkbox? The checkbox overlaps the text and/or the buttons, if you have multi-line text!

I try to figure it out, but I'm too tired...

[rsts]

Another Sparkie masterpiece.

Well done and thanks for sharing with us.

It's going in my toolbox

cheers

[srod]

That is great Sparks.

Where the hell d'ya pull #WH_CBT from?

I've seen it in passing, but never thought anything of it! It really seems quite powerful though - as demonstrated by your code! I don't think the docs do this one justice.

Nice one.

[Sparkie]

Thank you all, and you're all welcome

@srod: I first used WH_CALLWNDPROC but then I remembered using WH_CBT in one of my previous projects after reading somewhere (Google) that the WH_CBT uses less overhead since it reports back on fewer messages. The only messages we really need are the creation (HCBT_CREATEWND) and activation (HCBT_ACTIVATE) of our MessageRequester.

The checkbox overlaps the text and/or the buttons, if you have multi-line text!

I can't reproduce this. See if the new code works any better for you.

Use AskAgainRequester() in place of the native PB MessageRequester(). It takes the exact same parameters.

Code: Select all

; ***************************************************** 
; Code    : MessageRequester with "Don't ask me again" 
; Author  : Sparkie 
; Date    : November 18, 2006 
; OS      : Windows only 
; License : It's all yours to use as you so desire 
;           (props/credit would be nice) 
; ***************************************************** 

Global hHook.l = 0, oldProc.l = 0, askagain.l = 0 

;...These are missing in PB def 
#BS_TEXT = 0 
#IDABORT = 3
#IDTRYAGAIN = 10
#IDCONTINUE = 11

;...Make sure Checkbox ID <> any of the other MessageRequester buttons 
#CheckBoxID = 12 

;...Subclassed MessageRequester Procedure() 
Procedure MsgBoxProc(hwnd.l, msg.l, wParam.l, lParam.l) 
  result.l = CallWindowProc_(oldProc, hwnd, msg, wParam, lParam) 
  Select msg 
    Case #WM_DESTROY 
      ;...Get handle to our checkbox 
      hCheckBox.l = GetDlgItem_(hwnd, #CheckBoxID) 
      ;...Get the checkbox state. <0 = not checked> <1 = checked> 
      ;...For this test I'll set a Global var to = CheckBox state 
      ;...In a real app you could set the value in a config/ini file 
      ;...or maybe a use a Registry setting 
      askagain = SendMessage_(hCheckBox, #BM_GETCHECK, 0, 0) 
  EndSelect 
  ProcedureReturn result 
EndProcedure 

;...Our hook Procedure() 
Procedure CBTProc(nCode.l, wParam.l, lParam.l) 
  result.l = CallNextHookEx_(hHook, nCode,wParam,lParam) 
  ;...Creation of MessageRequester is here 
  If nCode = #HCBT_CREATEWND 
    *cbt_cw.CBT_CREATEWND = lParam 
    *lpcs.CREATESTRUCT = *cbt_cw\lpcs 
    ;...Take action only if this is our MessageRequester 
    If *lpcs\hWndParent = WindowID(0) And *lpcs\lpszClass = 32770 
      ;...Resize the MessageRequester to make room for our CheckBoxGadget 
      *lpcs\cy + 25 
    EndIf
    result = 0 
  EndIf 
  
  ;...MessageRequester is about to become active 
  ;...Here we will add our "Don't ask me this again" checkbox 
  If nCode = #HCBT_ACTIVATE 
    hMsgBox.l = wParam 
    ;...Subclass the MessageRequester 
    oldProc = SetWindowLong_(hMsgBox, #GWL_WNDPROC, @MsgBoxProc()) 
    hFont.l = GetStockObject_(#DEFAULT_GUI_FONT) 
    StartDrawing(WindowOutput(0))
    DrawingFont(hFont)
    cbWidth = TextWidth("Don't ask me this again.") + 22 ; add room for checkbox
    cbHeight = TextHeight("Don't ask me this again.")
    StopDrawing()
    ;...Determine Checkbox placement
    GetWindowRect_(hMsgBox, @winRC.RECT)
    pt.POINT\x = winRC\left
    pt.POINT\y = winRC\bottom
    ScreenToClient_(hMsgBox, pt)
    cbX = 10
    cbY = (pt\y - cbHeight) - 10
    hCheckBox.l = CreateWindowEx_(0, "Button", "Don't ask me this again.", #BS_AUTOCHECKBOX | #BS_TEXT | #WS_GROUP | #WS_TABSTOP | #WS_CHILD | #WS_VISIBLE, cbX, cbY, cbWidth, cbHeight, hMsgBox, #CheckBoxID, GetModuleHandle_(0), 0) 
    SendMessage_(hCheckBox, #WM_SETFONT, hFont, 0) 
    ;...Release the hook 
    UnhookWindowsHookEx_(hHook) 
    hHook = 0 
    result = 0 
  EndIf 
  ProcedureReturn result 
EndProcedure 

;...Procedure for custom MessageRequester with "Don't ask again" CheckBox
Procedure AskAgainRequester(caption$, message$, buttons_icon)
  hHook = SetWindowsHookEx_(#WH_CBT, @CBTProc(), 0, GetCurrentThreadId_()) 
  If hHook
    result = MessageRequester(caption$, message$, buttons_icon)
  EndIf
  ProcedureReturn result
EndProcedure

;Procedure to diplay the result from MessageRequester
Procedure.s DisplayAnswer(ans.l)
  Select ans
    Case #IDABORT
      ans$ = "Abort"
    Case #IDCANCEL
      ans$ = "Cancel"
    Case #IDCONTINUE
      ans$ = "Continue"
    Case #IDIGNORE
      ans$ = "Ignore"
    Case #IDNO
      ans$ = "No"
    Case #IDOK
      ans$ = "Ok"
    Case #IDRETRY
      ans$ = "Retry"
    Case #IDTRYAGAIN
      ans$ = "Try Again"
    Case #IDYES
      ans$ = "Yes"
  EndSelect
  ProcedureReturn ans$
EndProcedure
      
If OpenWindow(0, 100, 100, 300, 200, "Don't ask me again", #PB_Window_SystemMenu | #PB_Window_ScreenCentered) And CreateGadgetList(WindowID(0)) 
  ButtonGadget(1, 10, 40, 280, 25, "Display Custom MessageRequester")
  ButtonGadget(2, 10, 80, 280, 25, "Display Normal MessageRequester")
  TextGadget(3, 10, 120, 280, 50, "")
  Repeat 
    Event.l = WaitWindowEvent() 
    If Event = #PB_Event_Gadget
      Select EventGadget()
        Case 1
          SetGadgetText(3, "")
          ans$ = ""
          answer.l = AskAgainRequester("Welcome", "Do you want to continue?", #MB_YESNOCANCEL | #MB_ICONQUESTION) 
          If askagain
            ans$ + #CRLF$ + "Don't ask me again was checked"
          Else
            ans$ + #CRLF$ + "Don't ask me again was not checked"
          EndIf
          SetGadgetText(3, "The answer was "  + DisplayAnswer(answer) + #CRLF$ + ans$)
        Case 2
          SetGadgetText(3, "")
          answer.l = MessageRequester("Hello", "No hook is being used right now.", #MB_OK | #MB_ICONINFORMATION) 
          SetGadgetText(3, "The answer was "  + DisplayAnswer(answer))
      EndSelect
    EndIf 
  Until Event = #PB_Event_CloseWindow 
EndIf 
;...Just in case it's still there
If hHook 
  UnhookWindowsHookEx_(hHook) 
  hHook = 0 
EndIf
End

[Dare]

Doffs hat. Nice.

[Sparkie]

Thanks Dare

Here is another MessaageBox with a checkbox option. It's only for Win2K and up, and IMHO, it's not as useful as the previous example, but here it is just the same.

http://msdn.microsoft.com/library/defau ... xcheck.asp

Running this code will create a new Registry entry at HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\DontShowMeThisDialogAgain. The Name will be SparkieSaysDeleteMe. Use the App Button or go into RegEdit and delete it by hand if so desired. As always, anytime you deal with the Registry...backup...backup...backup.

Code: Select all

; ******************************************************************************* 
; Code    : MessageRequester with "In the future, do not show me this dialog box" 
; Author  : Sparkie 
; Date    : November 18, 2006 
; OS      : Windows only 
; Notes   : Use at your own risk as this reads/writes in the Registry
; License : It's all yours to use as you so desire 
;           (props/credit would be nice) 
; ******************************************************************************* 

If OSVersion() > #PB_OS_Windows_ME
  If OpenWindow(0, 100, 100, 300, 200, "Don't ask me again", #PB_Window_SystemMenu | #PB_Window_ScreenCentered) And CreateGadgetList(WindowID(0)) 
    ButtonGadget(1, 10, 40, 280, 25, "Display Custom MessageRequester") 
    ButtonGadget(2, 10, 70, 280, 25, "Delete Registry Entry to enable MessageRequester") 
    DisableGadget(2, 1)
    Repeat 
      Event.l = WaitWindowEvent() 
      If Event = #PB_Event_Gadget 
        Select EventGadget() 
          Case 1 
            hdll = OpenLibrary(0, "shlwapi.dll")
            If hdll
              ;...SHMessageBoxCheck() can only be called by it's ordinal
              *shmbc = GetFunctionEntry(0, 185)
              If *shmbc
                ;...6th parameter is value to return if this MessageRequester has been turned off
                ;...7th parameter is unique Registry identifier
                result = CallFunctionFast(*shmbc, WindowID(0), @"This is a test of the SHMessageBoxCheck() Function", @"Welcome", #MB_YESNO, -1, @"SparkieSaysDeleteMe")
                Select result
                  Case -1
                    ;...MessageRequester has been disabled
                    ;...Allow removal of Registry entry to re-enable Messagerequester
                    DisableGadget(2, 0)
                  Default
                    ;...MessageRequester is still enabled
                    ;...No need to delete Registry entry
                    DisableGadget(2, 1)
                EndSelect
              EndIf
              CloseLibrary(0)
            EndIf
          Case 2
            ;...Delete Registry entry
            hKey = 0
            RegOpenKeyEx_(#HKEY_CURRENT_USER, @"Software\Microsoft\Windows\CurrentVersion\Explorer\DontShowMeThisDialogAgain", 0, #KEY_ALL_ACCESS, @hKey)
            If hKey <> 0 And result = -1
              RegDeleteValue_(hKey, @"SparkieSaysDeleteMe")
              RegCloseKey_(hKey)
              hKey = 0
              DisableGadget(2, 1)
            EndIf
        EndSelect 
      EndIf 
    Until Event = #PB_Event_CloseWindow 
  EndIf 
Else
  MessageRequester("Sorry", "This requires a minimum of Win2K", #MB_OK | #MB_ICONEXCLAMATION)
EndIf
End

[AND51]

The checkbox overlaps the text and/or the buttons, if you have multi-line text!

I can't reproduce this. See if the new code works any better for you.

Hi! I tried this message-text with your old code and th checkbox overlapped the text and the buttons.
Well, with your new code (not the 2k+ one) it works well! THANK YOU AGAIN!

Code: Select all

AskAgainRequester("Welcome", "Do you want to continue?"+#CRLF$+#CRLF$+#CRLF$+#CRLF$+#CRLF$+#CRLF$+#CRLF$+#CRLF$+"There are many line-breaks... =(", #MB_YESNOCANCEL | #MB_ICONQUESTION) 

• I tried this message-text. Old code: overlap; new code: OK!

[AND51]

Here is another MessaageBox with a checkbox option. It's only for Win2K and up, and IMHO, it's not as useful as the previous example, but here it is just the same.

http://msdn.microsoft.com/library/defau ... xcheck.asp

I'm not sure, but can't you import functions since PB 4.00 with Import and/or Prototype?

I'm just guessing right now, because I have never worked with these commands. My idea is: If you import the functions into your final EXE, you can use the API command also on Win 9x/ME etc.

[BarryG]

Sparkie's code here doesn't work anymore (illegal memory access) -> viewtopic.php?p=171031#p171031

Anyone know how to fix it? Thanks.

[Comfort]

Sparkie's code here doesn't work anymore (illegal memory access) -> viewtopic.php?p=171031#p171031

Anyone know how to fix it? Thanks.

A couple of variables need to be integers for it to work with C backend compiler... there could be more.

Line 10 :

Code: Select all

Global hHook.i = 0, oldProc.i = 0, askagain.l = 0 

[Fred]

I just updated the code for PB6+